+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>Headphone hub</title>
-<!-- 2020-12-25 Fri 23:48 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
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-});
-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Headphone hub</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-<p>
-Simple hub that allows connecting up to 4 devices via headphone
-jack. For example single laptop or mp3 player can power up to 3
-headphones.
-</p>
-
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Schematic diagram:
-<img src="schematic.png" class="img-responsive" alt="schematic.png">
-</p>
-
-<p>
-Warning: All devices are connected in parallel. Make sure that audio
-producing device can handle combined load. See:
-<a href="https://en.wikipedia.org/wiki/Series_and_parallel_circuits#Resistance_units_2">https://en.wikipedia.org/wiki/Series_and_parallel_circuits#Resistance_units_2</a>
-</p>
-
-
-<figure>
-<p><img src="make,%202.png" class="img-responsive" alt="make,%202.png">
-</p>
-</figure>
-
-<p>
-Device consists of body and cover that are held together by single
-screw at the center:
-</p>
-
-
-<figure>
-<p><img src="cover,%202.png" class="img-responsive" alt="cover,%202.png">
-</p>
-</figure>
-</div>
-</div>
-
-<div id="outline-container-sec-3" class="outline-2">
-<h2 id="sec-3"><span class="section-number-2">3</span> Download</h2>
-<div class="outline-text-2" id="text-3">
-<ul class="org-ul">
-<li><a href="hub.FCStd">FreeCAD project</a>
-</li>
-</ul>
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-
-<p>
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-<img src="body.png" class="img-responsive" alt="body.png">
-</p>
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-
-
-<hr >
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-</p>
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-
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-<li><a href="#sec-2">2. Project description</a></li>
-<li><a href="#sec-3">3. Download</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-12-25 Fri 23:48</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Headphone hub
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
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-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-Simple hub that allows connecting up to 4 devices via headphone
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-headphones.
-
-[[file:make.png]]
-
-Schematic diagram:
-[[file:schematic.png]]
-
-Warning: All devices are connected in parallel. Make sure that audio
-producing device can handle combined load. See:
-https://en.wikipedia.org/wiki/Series_and_parallel_circuits#Resistance_units_2
-
-[[file:make,%202.png]]
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-* Download
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-- [[file:hub.FCStd][FreeCAD project]]
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-
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-
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------
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+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>Portable stereo speaker</title>
-<!-- 2020-04-12 P 23:58 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
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-pre {background-color: #111; color: #ccc;}
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- min-height: 100%;
-}
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-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Portable stereo speaker</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-<p>
-I had pair of good compact stereo speakers lying uselessly around as
-well as secondhand TDA2030 Chinese knockoff audio amplifier chips.
-Also I wanted to test modular construction approach: motherboard with
-shared bus and functionality realized via pluggable modules. So I
-built stereo speaker:
-</p>
-
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Indicator on the front panel shows available power within the
-system. Ideally it should be at the maximum. It drops when batteries
-run empty or when consumed power (too loud music) is greater than
-onboard power supply or batteries can handle. It has on/off switch and
-stereo audio input. Audio input impedance is about 100 ohms.
-</p>
-
-
-<figure>
-<p><img src="make,%20side.png" class="img-responsive" alt="make,%20side.png">
-</p>
-</figure>
-
-<p>
-Idea for the holes on the top and smaller ones on the bottom back is
-to enable air flow for passive cooling.
-</p>
-
-
-<figure>
-<p><img src="make,%20back.png" class="img-responsive" alt="make,%20back.png">
-</p>
-</figure>
-
-<p>
-Entire construction is made of parts, no larger than
-120x120x120mm. Maximum for my printer.
-</p>
-</div>
-</div>
-
-<div id="outline-container-sec-3" class="outline-2">
-<h2 id="sec-3"><span class="section-number-2">3</span> Battery holder</h2>
-<div class="outline-text-2" id="text-3">
-<p>
-Device is powered by 4 times AA NiMH batteries (1.2V each).
-</p>
-
-
-<figure>
-<p><img src="battery%20holder/schematic.png" class="img-responsive" alt="schematic.png">
-</p>
-</figure>
-
-<p>
-I happened to have AA battery adapters lying around with different
-bottom hole configurations. Therefore this weird hole design:
-</p>
-
-
-<figure>
-<p><img src="battery%20holder/battery%20holder.png" class="img-responsive" alt="battery%20holder.png">
-</p>
-</figure>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="battery%20holder/battery%20holder.FCStd">FreeCAD file</a>
-</li>
-<li><a href="battery%20holder/battery%20holder.stl">STL file</a>
-</li>
-</ul>
-
-<p>
-Result:
-<img src="battery%20holder/make.png" class="img-responsive" alt="make.png">
-</p>
-
-<p>
-Attaches to the back of the body:
-<img src="battery%20holder/mounted%20on%20the%20back.png" class="img-responsive" alt="mounted%20on%20the%20back.png">
-</p>
-</div>
-</div>
-
-<div id="outline-container-sec-4" class="outline-2">
-<h2 id="sec-4"><span class="section-number-2">4</span> 20V up-step module</h2>
-<div class="outline-text-2" id="text-4">
-<p>
-Battery pack voltage is routed through main on/off switch on the front
-panel, and then it goes to the 20V up-step module.
-</p>
-
-
-<figure>
-<p><img src="20V%20upstep%20module/schematic.png" class="img-responsive" alt="schematic.png">
-</p>
-</figure>
-
-<p>
-It uses ready made upstep module, but adds extra voltage filtering via
-inductor and capacitors.
-</p>
-
-
-<figure>
-<p><img src="20V%20upstep%20module/make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-</div>
-</div>
-
-<div id="outline-container-sec-5" class="outline-2">
-<h2 id="sec-5"><span class="section-number-2">5</span> Main board</h2>
-<div class="outline-text-2" id="text-5">
-<p>
-Voltage upstep above sits on top of main board (motherboard). It has
-uniform central bus that spans all connectors.
-</p>
-
-
-<figure>
-<p><img src="main%20board/internal%20bus.png" class="img-responsive" alt="internal%20bus.png">
-</p>
-</figure>
-
-
-<figure>
-<p><img src="main%20board/bus%20on%20the%20bottom,%202.png" class="img-responsive" alt="bus%20on%20the%20bottom,%202.png">
-</p>
-</figure>
-
-<p>
-First row of the main board is special IO terminal (for connecting
-speakers, front panel, etc..)
-</p>
-
-
-<figure>
-<p><img src="main%20board/IO%20terminal.png" class="img-responsive" alt="IO%20terminal.png">
-</p>
-</figure>
-
-<p>
-Remaining rows are for connecting boards:
-</p>
-
-
-<figure>
-<p><img src="main%20board/1.png" class="img-responsive" alt="1.png">
-</p>
-</figure>
-
-<p>
-To provide structural support, main board is attached to frame:
-</p>
-
-
-<figure>
-<p><img src="main%20board/board%20fixator%20body.png" class="img-responsive" alt="board%20fixator%20body.png">
-</p>
-</figure>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="main%20board/board%20fixator%20body.FCStd">FreeCAD file</a>
-</li>
-<li><a href="main%20board/board%20fixator%20body.stl">STL file</a>
-</li>
-</ul>
-
-<p>
-And boards plugged into main board are fixed at the top, using clip:
-</p>
-
-
-<figure>
-<p><img src="main%20board/board%20fixator%20top%20clip.png" class="img-responsive" alt="board%20fixator%20top%20clip.png">
-</p>
-</figure>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="main%20board/board%20fixator%20top%20clip.FCStd">FreeCAD file</a>
-</li>
-<li><a href="main%20board/board%20fixator%20top%20clip.stl">STL file</a>
-</li>
-</ul>
-
-<p>
-Result:
-</p>
-
-
-<figure>
-<p><img src="main%20board/bus%20on%20the%20bottom,%201.png" class="img-responsive" alt="bus%20on%20the%20bottom,%201.png">
-</p>
-</figure>
-
-
-<figure>
-<p><img src="main%20board/board%20fixator.png" class="img-responsive" alt="board%20fixator.png">
-</p>
-</figure>
-</div>
-</div>
-
-<div id="outline-container-sec-6" class="outline-2">
-<h2 id="sec-6"><span class="section-number-2">6</span> Mono audio amplifier module</h2>
-<div class="outline-text-2" id="text-6">
-<p>
-Design uses scavenged secondhand Chinese TDA2030 audio amp
-clones. Each chip is mono audio amplifier. Therefore 2 almost
-identical audio amp modules had to be built, one for left speaker, one
-for right.
-</p>
-
-
-<figure>
-<p><img src="mono%20audio%20amp%20module/schematic.png" class="img-responsive" alt="schematic.png">
-</p>
-</figure>
-
-<p>
-I like to build on top of prototype PCBs. Gives results much faster
-for one-off projects. Before soldering, I solve component layout on
-paper:
-</p>
-
-
-<figure>
-<p><img src="mono%20audio%20amp%20module/PCB%20layout.png" class="img-responsive" alt="PCB%20layout.png">
-</p>
-</figure>
-
-<p>
-Result - front:
-</p>
-
-
-<figure>
-<p><img src="mono%20audio%20amp%20module/assembled%20front.png" class="img-responsive" alt="assembled%20front.png">
-</p>
-</figure>
-
-<p>
-Result - back:
-</p>
-
-
-<figure>
-<p><img src="mono%20audio%20amp%20module/assembled%20back.png" class="img-responsive" alt="assembled%20back.png">
-</p>
-</figure>
-
-<p>
-Here copper tape is used as improvised heatsink.
-</p>
-</div>
-</div>
-
-<div id="outline-container-sec-7" class="outline-2">
-<h2 id="sec-7"><span class="section-number-2">7</span> Speakers</h2>
-<div class="outline-text-2" id="text-7">
-<p>
-High frequency small speaker and medium frequency bigger speaker are
-combined.
-</p>
-
-
-<figure>
-<p><img src="speakers/schematic.png" class="img-responsive" alt="schematic.png">
-</p>
-</figure>
-
-<p>
-Capacitor acts as high-pass filter on top of tiny PCB:
-</p>
-
-
-<figure>
-<p><img src="speakers/PCB%20layout.png" class="img-responsive" alt="PCB%20layout.png">
-</p>
-</figure>
-
-<p>
-Speaker enclosure:
-</p>
-
-
-<figure>
-<p><img src="speakers/speaker%20enclosure.png" class="img-responsive" alt="speaker%20enclosure.png">
-</p>
-</figure>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="speakers/speaker%20enclosure.FCStd">FreeCAD file</a>
-</li>
-<li><a href="speakers/speaker%20enclosure.stl">STL file</a>
-</li>
-</ul>
-
-<p>
-Speaker enclosure cover:
-</p>
-
-
-<figure>
-<p><img src="speakers/speaker%20enclosure%20cover.png" class="img-responsive" alt="speaker%20enclosure%20cover.png">
-</p>
-</figure>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="speakers/speaker%20enclosure%20cover.FCStd">FreeCAD file</a>
-</li>
-<li><a href="speakers/speaker%20enclosure%20cover.stl">STL file</a>
-</li>
-</ul>
-
-<p>
-Result:
-</p>
-
-
-<figure>
-<p><img src="speakers/make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-</div>
-</div>
-
-<div id="outline-container-sec-8" class="outline-2">
-<h2 id="sec-8"><span class="section-number-2">8</span> Front panel</h2>
-<div class="outline-text-2" id="text-8">
-<p>
-Initial idea was really simple panel:
-</p>
-<ul class="org-ul">
-<li>on/off switch
-</li>
-<li>system power indicator
-</li>
-<li>stereo audio input
-</li>
-</ul>
-
-<p>
-But, since I'm using "agile" approach, during load-testing, it become
-clear that active fan based cooling would be nice (when playing loud
-music). I found tiny cooler fan that needs 5 volts to operate. Also I
-need to power backlight for power indicator. For both of these cases,
-I decided to add another voltage up-step module (target voltage output
-set to 6V). This time directly on the front panel.
-</p>
-
-
-<figure>
-<p><img src="front%20panel/schematic.png" class="img-responsive" alt="schematic.png">
-</p>
-</figure>
-
-<p>
-Front panel case:
-</p>
-
-
-<figure>
-<p><img src="front%20panel/front%20panel,%20front.png" class="img-responsive" alt="front%20panel,%20front.png">
-</p>
-</figure>
-
-
-<figure>
-<p><img src="front%20panel/front%20panel,%20back.png" class="img-responsive" alt="front%20panel,%20back.png">
-</p>
-</figure>
-
-<p>
-Electronics fits inside:
-</p>
-
-
-<figure>
-<p><img src="front%20panel/front%20panel,%20back,%20make.png" class="img-responsive" alt="front%20panel,%20back,%20make.png">
-</p>
-</figure>
-
-<p>
-Front view:
-</p>
-
-
-<figure>
-<p><img src="front%20panel/front%20panel,%20front,%20make.png" class="img-responsive" alt="front%20panel,%20front,%20make.png">
-</p>
-</figure>
-
-<p>
-And attaches to the remaining components:
-</p>
-
-
-<figure>
-<p><img src="front%20panel/attachment.png" class="img-responsive" alt="attachment.png">
-</p>
-</figure>
-</div>
-</div>
-
-
-<div id="outline-container-sec-9" class="outline-2">
-<h2 id="sec-9"><span class="section-number-2">9</span> Extra capacitors</h2>
-<div class="outline-text-2" id="text-9">
-<p>
-Another thing that become clear during load-testing: output
-power/volume can be further enhanced by adding high power capacitors
-to even out load on primary 20V up-step module.
-</p>
-
-
-<figure>
-<p><img src="extra%20capacitors/extra%20caps.png" class="img-responsive" alt="extra%20caps.png">
-</p>
-</figure>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="extra%20capacitors/extra%20caps.FCStd">FreeCAD project</a>
-</li>
-<li><a href="extra%20capacitors/extra%20caps.stl">STL file</a>
-</li>
-</ul>
-
-<p>
-Extra caps are mounted on top of the speaker and electrically attached
-to the main board.
-</p>
-
-
-<figure>
-<p><img src="extra%20capacitors/make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-</div>
-</div>
-
-<div id="outline-container-sec-10" class="outline-2">
-<h2 id="sec-10"><span class="section-number-2">10</span> Center box</h2>
-<div class="outline-text-2" id="text-10">
-<p>
-Last physical part, to attach it all together: central body.
-</p>
-
-<p>
-Front:
-<img src="center%20box/front.png" class="img-responsive" alt="front.png">
-</p>
-
-<p>
-Back:
-<img src="center%20box/back.png" class="img-responsive" alt="back.png">
-</p>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="center%20box/center%20box.FCStd">FreeCAD file</a>
-</li>
-<li><a href="center%20box/center%20box.stl">STL file</a>
-</li>
-</ul>
-</div>
-</div>
-
-
-<div id="outline-container-sec-11" class="outline-2">
-<h2 id="sec-11"><span class="section-number-2">11</span> Conclusions / TODO</h2>
-<div class="outline-text-2" id="text-11">
-<p>
-These things could be done better:
-</p>
-
-<ul class="org-ul">
-<li>Instead of using undersized heatsinks on the audio amplifiers and
-need for active cooling as a consequence, it would be better to try
-to mount audio amplifier chip on top of speaker metallic body. It
-would provide plenty of cooling and reduces power losses within
-cable, since amplifier would be as close to the speaker as possible.
-</li>
-
-<li>I used agile design. That is, implemented functionality ad-hoc. If I
-had done design in advance, then I could have had smarter connector
-layout between main board and front panel. That is: Instead of
-multiple smaller cables, one wide (multi connector) cable.
-</li>
-
-<li>Screw holes are too close to the edges on the front panel.
-</li>
-
-<li>It would be better if screw heads were slightly buried within
-construction body.
-</li>
-</ul>
-
-
-<p>
-Overall, it was good learning experience and I was able to test
-various ideas on it. Will add cooler later :)
-</p>
-
-
-<p>
-Photo of initial PSU + audio amp test:
-</p>
-
-
-<figure>
-<p><img src="initial%20test.png" class="img-responsive" alt="initial%20test.png">
-</p>
-</figure>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-<li><a href="#sec-3">3. Battery holder</a></li>
-<li><a href="#sec-4">4. 20V up-step module</a></li>
-<li><a href="#sec-5">5. Main board</a></li>
-<li><a href="#sec-6">6. Mono audio amplifier module</a></li>
-<li><a href="#sec-7">7. Speakers</a></li>
-<li><a href="#sec-8">8. Front panel</a></li>
-<li><a href="#sec-9">9. Extra capacitors</a></li>
-<li><a href="#sec-10">10. Center box</a></li>
-<li><a href="#sec-11">11. Conclusions / TODO</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-04-12 P 23:58</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Portable stereo speaker
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-I had pair of good compact stereo speakers lying uselessly around as
-well as secondhand TDA2030 Chinese knockoff audio amplifier chips.
-Also I wanted to test modular construction approach: motherboard with
-shared bus and functionality realized via pluggable modules. So I
-built stereo speaker:
-
-[[file:make.png]]
-
-Indicator on the front panel shows available power within the
-system. Ideally it should be at the maximum. It drops when batteries
-run empty or when consumed power (too loud music) is greater than
-onboard power supply or batteries can handle. It has on/off switch and
-stereo audio input. Audio input impedance is about 100 ohms.
-
-[[file:make,%20side.png]]
-
-Idea for the holes on the top and smaller ones on the bottom back is
-to enable air flow for passive cooling.
-
-[[file:make,%20back.png]]
-
-Entire construction is made of parts, no larger than
-120x120x120mm. Maximum for my printer.
-
-* Battery holder
-Device is powered by 4 times AA NiMH batteries (1.2V each).
-
-[[file:battery%20holder/schematic.png]]
-
-I happened to have AA battery adapters lying around with different
-bottom hole configurations. Therefore this weird hole design:
-
-[[file:battery%20holder/battery%20holder.png]]
-
-Download:
-+ [[file:battery%20holder/battery%20holder.FCStd][FreeCAD file]]
-+ [[file:battery%20holder/battery%20holder.stl][STL file]]
-
-Result:
-[[file:battery%20holder/make.png]]
-
-Attaches to the back of the body:
-[[file:battery%20holder/mounted%20on%20the%20back.png]]
-
-* 20V up-step module
-Battery pack voltage is routed through main on/off switch on the front
-panel, and then it goes to the 20V up-step module.
-
-[[file:20V%20upstep%20module/schematic.png]]
-
-It uses ready made upstep module, but adds extra voltage filtering via
-inductor and capacitors.
-
-[[file:20V%20upstep%20module/make.png]]
-
-* Main board
-
-Voltage upstep above sits on top of main board (motherboard). It has
-uniform central bus that spans all connectors.
-
-[[file:main%20board/internal%20bus.png]]
-
-[[file:main%20board/bus%20on%20the%20bottom,%202.png]]
-
-First row of the main board is special IO terminal (for connecting
-speakers, front panel, etc..)
-
-[[file:main%20board/IO%20terminal.png]]
-
-Remaining rows are for connecting boards:
-
-[[file:main%20board/1.png]]
-
-To provide structural support, main board is attached to frame:
-
-[[file:main%20board/board%20fixator%20body.png]]
-
-Download:
-+ [[file:main%20board/board%20fixator%20body.FCStd][FreeCAD file]]
-+ [[file:main%20board/board%20fixator%20body.stl][STL file]]
-
-And boards plugged into main board are fixed at the top, using clip:
-
-[[file:main%20board/board%20fixator%20top%20clip.png]]
-
-Download:
-+ [[file:main%20board/board%20fixator%20top%20clip.FCStd][FreeCAD file]]
-+ [[file:main%20board/board%20fixator%20top%20clip.stl][STL file]]
-
-Result:
-
-[[file:main%20board/bus%20on%20the%20bottom,%201.png]]
-
-[[file:main%20board/board%20fixator.png]]
-
-* Mono audio amplifier module
-
-Design uses scavenged secondhand Chinese TDA2030 audio amp
-clones. Each chip is mono audio amplifier. Therefore 2 almost
-identical audio amp modules had to be built, one for left speaker, one
-for right.
-
-[[file:mono%20audio%20amp%20module/schematic.png]]
-
-I like to build on top of prototype PCBs. Gives results much faster
-for one-off projects. Before soldering, I solve component layout on
-paper:
-
-[[file:mono%20audio%20amp%20module/PCB%20layout.png]]
-
-Result - front:
-
-[[file:mono%20audio%20amp%20module/assembled%20front.png]]
-
-Result - back:
-
-[[file:mono%20audio%20amp%20module/assembled%20back.png]]
-
-Here copper tape is used as improvised heatsink.
-
-* Speakers
-
-High frequency small speaker and medium frequency bigger speaker are
-combined.
-
-[[file:speakers/schematic.png]]
-
-Capacitor acts as high-pass filter on top of tiny PCB:
-
-[[file:speakers/PCB%20layout.png]]
-
-Speaker enclosure:
-
-[[file:speakers/speaker%20enclosure.png]]
-
-Download:
-+ [[file:speakers/speaker%20enclosure.FCStd][FreeCAD file]]
-+ [[file:speakers/speaker%20enclosure.stl][STL file]]
-
-Speaker enclosure cover:
-
-[[file:speakers/speaker%20enclosure%20cover.png]]
-
-Download:
-+ [[file:speakers/speaker%20enclosure%20cover.FCStd][FreeCAD file]]
-+ [[file:speakers/speaker%20enclosure%20cover.stl][STL file]]
-
-Result:
-
-[[file:speakers/make.png]]
-
-* Front panel
-
-Initial idea was really simple panel:
-+ on/off switch
-+ system power indicator
-+ stereo audio input
-
-But, since I'm using "agile" approach, during load-testing, it become
-clear that active fan based cooling would be nice (when playing loud
-music). I found tiny cooler fan that needs 5 volts to operate. Also I
-need to power backlight for power indicator. For both of these cases,
-I decided to add another voltage up-step module (target voltage output
-set to 6V). This time directly on the front panel.
-
-[[file:front%20panel/schematic.png]]
-
-Front panel case:
-
-[[file:front%20panel/front%20panel,%20front.png]]
-
-[[file:front%20panel/front%20panel,%20back.png]]
-
-Electronics fits inside:
-
-[[file:front%20panel/front%20panel,%20back,%20make.png]]
-
-Front view:
-
-[[file:front%20panel/front%20panel,%20front,%20make.png]]
-
-And attaches to the remaining components:
-
-[[file:front%20panel/attachment.png]]
-
-
-* Extra capacitors
-Another thing that become clear during load-testing: output
-power/volume can be further enhanced by adding high power capacitors
-to even out load on primary 20V up-step module.
-
-[[file:extra%20capacitors/extra%20caps.png]]
-
-Download:
-+ [[file:extra%20capacitors/extra%20caps.FCStd][FreeCAD project]]
-+ [[file:extra%20capacitors/extra%20caps.stl][STL file]]
-
-Extra caps are mounted on top of the speaker and electrically attached
-to the main board.
-
-[[file:extra%20capacitors/make.png]]
-
-* Center box
-
-Last physical part, to attach it all together: central body.
-
-Front:
-[[file:center%20box/front.png]]
-
-Back:
-[[file:center%20box/back.png]]
-
-Download:
-+ [[file:center%20box/center%20box.FCStd][FreeCAD file]]
-+ [[file:center%20box/center%20box.stl][STL file]]
-
-
-* Conclusions / TODO
-
-These things could be done better:
-
-+ Instead of using undersized heatsinks on the audio amplifiers and
- need for active cooling as a consequence, it would be better to try
- to mount audio amplifier chip on top of speaker metallic body. It
- would provide plenty of cooling and reduces power losses within
- cable, since amplifier would be as close to the speaker as possible.
-
-+ I used agile design. That is, implemented functionality ad-hoc. If I
- had done design in advance, then I could have had smarter connector
- layout between main board and front panel. That is: Instead of
- multiple smaller cables, one wide (multi connector) cable.
-
-+ Screw holes are too close to the edges on the front panel.
-
-+ It would be better if screw heads were slightly buried within
- construction body.
-
-
-Overall, it was good learning experience and I was able to test
-various ideas on it. Will add cooler later :)
-
-
-Photo of initial PSU + audio amp test:
-
-[[file:initial%20test.png]]
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--- /dev/null
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+.bs-docs-sidebar .nav > li > a {
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+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Fujifilm XC15-45mm lens case</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Case for Fujifilm XC15-45mm lens.
+</p>
+
+<p>
+Design utilizes <a href="https://www.amazon.de/gp/product/B00TACKU0O/">3mm x 2mm thick neodymium magnets</a>.
+</p>
+
+<p>
+Schematic assembled:
+<img src="assembled.png" class="img-responsive" alt="assembled.png">
+</p>
+
+<ul class="org-ul">
+<li>see also:
+<ul class="org-ul">
+<li><a href="../Fuji%20XC50-230mm%20lens%20case/">Fujifilm XC50-230mm lens case</a>
+</li>
+<li><a href="../Fujifilm%20camera%20battery%20box/">Fujifilm camera battery box</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-3" class="outline-2">
+<h2 id="sec-3"><span class="section-number-2">3</span> Files</h2>
+<div class="outline-text-2" id="text-3">
+<p>
+You can <a href="Fuji%20camera%20lens%20container.FCStd">download FreeCAD project</a> file to tweak design or generated STL
+files ready for 3D printing:
+</p>
+
+<p>
+Body: <a href="body.stl">body.stl</a>
+<img src="body.png" class="img-responsive" alt="body.png">
+</p>
+
+<p>
+Cover: <a href="cover.stl">cover.stl</a>
+<img src="cover.png" class="img-responsive" alt="cover.png">
+</p>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+<li><a href="#sec-3">3. Files</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-11-20 R 21:51</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Fujifilm XC15-45mm lens case
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+[[file:make.png]]
+
+Case for Fujifilm XC15-45mm lens.
+
+Design utilizes [[https://www.amazon.de/gp/product/B00TACKU0O/][3mm x 2mm thick neodymium magnets]].
+
+Schematic assembled:
+[[file:assembled.png]]
+
+- see also:
+ - [[file:../Fuji%20XC50-230mm%20lens%20case/][Fujifilm XC50-230mm lens case]]
+ - [[file:../Fujifilm%20camera%20battery%20box/][Fujifilm camera battery box]]
+
+* Files
+
+You can [[file:Fuji%20camera%20lens%20container.FCStd][download FreeCAD project]] file to tweak design or generated STL
+files ready for 3D printing:
+
+Body: [[file:body.stl][body.stl]]
+[[file:body.png]]
+
+Cover: [[file:cover.stl][cover.stl]]
+[[file:cover.png]]
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>Fujifilm XC50-230mm lens case</title>
+<!-- 2020-11-20 R 21:45 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Fujifilm XC50-230mm lens case</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Case for Fujifilm XC50-230mm lens.
+</p>
+
+<p>
+Design utilizes <a href="https://www.amazon.de/gp/product/B00TACKU0O/">3mm x 2mm thick neodymium magnets</a>.
+</p>
+
+<p>
+Schematic assembled:
+<img src="assembled.png" class="img-responsive" alt="assembled.png">
+</p>
+</div>
+</div>
+<div id="outline-container-sec-3" class="outline-2">
+<h2 id="sec-3"><span class="section-number-2">3</span> Files</h2>
+<div class="outline-text-2" id="text-3">
+<p>
+You can <a href="Fuji%20camera%20lens%20container.FCStd">download FreeCAD project</a> file to tweak design or generated STL
+files ready for 3D printing:
+</p>
+
+<p>
+Body: <a href="body.stl">body.stl</a>
+<img src="body.png" class="img-responsive" alt="body.png">
+</p>
+
+<p>
+Cover: <a href="cover.stl">cover.stl</a>
+<img src="cover.png" class="img-responsive" alt="cover.png">
+</p>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+<li><a href="#sec-3">3. Files</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-11-20 R 21:45</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Fujifilm XC50-230mm lens case
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+[[file:make.png]]
+
+Case for Fujifilm XC50-230mm lens.
+
+Design utilizes [[https://www.amazon.de/gp/product/B00TACKU0O/][3mm x 2mm thick neodymium magnets]].
+
+Schematic assembled:
+[[file:assembled.png]]
+* Files
+
+You can [[file:Fuji%20camera%20lens%20container.FCStd][download FreeCAD project]] file to tweak design or generated STL
+files ready for 3D printing:
+
+Body: [[file:body.stl][body.stl]]
+[[file:body.png]]
+
+Cover: [[file:cover.stl][cover.stl]]
+[[file:cover.png]]
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>Fujifilm camera battery box</title>
+<!-- 2020-03-21 Sat 00:37 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Fujifilm camera battery box</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Carrying case for spare Fujifilm camera Newell NP-W126 batteries.
+</p>
+
+<p>
+Design utilizes <a href="https://www.amazon.de/gp/product/B00TACKU0O/">3mm x 2mm thick neodymium magnets</a>.
+</p>
+</div>
+</div>
+<div id="outline-container-sec-3" class="outline-2">
+<h2 id="sec-3"><span class="section-number-2">3</span> Files</h2>
+<div class="outline-text-2" id="text-3">
+<p>
+You can <a href="body%20and%20cover.FCStd">download FreeCAD project</a> file to tweak design or generated STL
+files ready for 3D printing:
+</p>
+
+<ul class="org-ul">
+<li>Body: <a href="body.stl">download STL</a>
+<ul class="org-ul">
+<li><img src="body.png" class="img-responsive" alt="body.png">
+</li>
+</ul>
+</li>
+
+<li>Cover: <a href="cover.stl">download STL</a>
+<ul class="org-ul">
+<li><img src="cover.png" class="img-responsive" alt="cover.png">
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+<li><a href="#sec-3">3. Files</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-03-21 Sat 00:37</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Fujifilm camera battery box
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+[[file:make.png]]
+
+Carrying case for spare Fujifilm camera Newell NP-W126 batteries.
+
+Design utilizes [[https://www.amazon.de/gp/product/B00TACKU0O/][3mm x 2mm thick neodymium magnets]].
+* Files
+You can [[file:body%20and%20cover.FCStd][download FreeCAD project]] file to tweak design or generated STL
+files ready for 3D printing:
+
++ Body: [[file:body.stl][download STL]]
+ + [[file:body.png]]
+
++ Cover: [[file:cover.stl][download STL]]
+ + [[file:cover.png]]
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>Meiqqm portable dosimeter case</title>
+<!-- 2020-06-01 E 07:00 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Meiqqm portable dosimeter case</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+This Geiger–Müller counter based nuclear radiation detector can be
+bought <a href="https://www.amazon.de/gp/product/B07S171CD1/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1">here</a>.
+</p>
+
+<p>
+To better protect its display (for portable use), simple case have
+been made:
+</p>
+
+
+<figure>
+<p><img src="Meiqqm%20portable%20dosimeter%20case.png" class="img-responsive" alt="Meiqqm%20portable%20dosimeter%20case.png">
+</p>
+</figure>
+
+<p>
+Case has internally small bumps on the sides. It is suggested to
+insert device with the front panel towards the bump. Bumps are to
+ensure that screen and buttons are not scratched by the case.
+</p>
+
+<p>
+Download:
+</p>
+
+<ul class="org-ul">
+<li><a href="Meiqqm%20portable%20dosimeter%20case.stl">STL file</a>
+</li>
+<li><a href="Meiqqm%20portable%20dosimeter%20case.FCStd">FreeCAD project</a>
+</li>
+</ul>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-06-01 E 07:00</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Meiqqm portable dosimeter case
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+
+[[file:make.png]]
+
+This Geiger–Müller counter based nuclear radiation detector can be
+bought [[https://www.amazon.de/gp/product/B07S171CD1/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1][here]].
+
+To better protect its display (for portable use), simple case have
+been made:
+
+[[file:Meiqqm%20portable%20dosimeter%20case.png]]
+
+Case has internally small bumps on the sides. It is suggested to
+insert device with the front panel towards the bump. Bumps are to
+ensure that screen and buttons are not scratched by the case.
+
+Download:
+
+- [[file:Meiqqm%20portable%20dosimeter%20case.stl][STL file]]
+- [[file:Meiqqm%20portable%20dosimeter%20case.FCStd][FreeCAD project]]
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>NanoVNA case</title>
+<!-- 2020-05-24 P 12:44 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">NanoVNA case</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+<p>
+I felt that original NanoVNA case is too fragile for carrying this
+thing around in the bag. Also originally there is no housing for
+calibration and adapter connectors.
+</p>
+
+
+<figure>
+<p><img src="make,%201.png" class="img-responsive" alt="make,%201.png">
+</p>
+</figure>
+
+<p>
+This body/case provides better protection for device.
+</p>
+
+
+
+<figure>
+<p><img src="make,%202.png" class="img-responsive" alt="make,%202.png">
+</p>
+</figure>
+
+<p>
+While external case helps to carry this thing around in the bag, by
+covering touchscreen and housing calibration and adapter connectors.
+</p>
+
+
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Stylus / pincers help using touch screen and picking connectors from
+the box.
+</p>
+
+
+
+<figure>
+<p><img src="make,%204.png" class="img-responsive" alt="make,%204.png">
+</p>
+</figure>
+
+<p>
+Cover attaches to the body using <a href="https://www.amazon.de/gp/product/B00TACKU0O/">3mm x 2mm thick neodymium magnets</a>.
+</p>
+</div>
+</div>
+
+<div id="outline-container-sec-3" class="outline-2">
+<h2 id="sec-3"><span class="section-number-2">3</span> CAD renderings of assembled covers</h2>
+<div class="outline-text-2" id="text-3">
+<p>
+<img src="inner%20body%20assembled.png" class="img-responsive" alt="inner%20body%20assembled.png">
+CAD drawing for inner box/case.
+</p>
+
+<p>
+<img src="assembled.png" class="img-responsive" alt="assembled.png">
+CAD drawing for inner box/case within outer box.
+</p>
+</div>
+</div>
+<div id="outline-container-sec-4" class="outline-2">
+<h2 id="sec-4"><span class="section-number-2">4</span> Ready to print STL files</h2>
+<div class="outline-text-2" id="text-4">
+<hr >
+
+<p>
+<a href="inner%20box.stl">download: inner box</a>
+</p>
+
+<p>
+<img src="inner%20box,%201.png" class="img-responsive" alt="inner%20box,%201.png">
+<img src="inner%20box,%202.png" class="img-responsive" alt="inner%20box,%202.png">
+</p>
+
+<hr >
+
+<p>
+<a href="inner%20cover.stl">download: inner cover</a>
+<img src="inner%20cover.png" class="img-responsive" alt="inner%20cover.png">
+</p>
+
+<hr >
+
+<p>
+<a href="outer%20box.stl">download: outer box</a>
+<img src="outer%20box.png" class="img-responsive" alt="outer%20box.png">
+</p>
+
+<hr >
+
+<p>
+<a href="outer%20cover.stl">download: outer cover</a>
+<img src="outer%20cover.png" class="img-responsive" alt="outer%20cover.png">
+</p>
+
+<hr >
+
+<p>
+<a href="stylus.stl">download: stylus</a>
+<img src="stylus.png" class="img-responsive" alt="stylus.png">
+</p>
+</div>
+</div>
+
+<div id="outline-container-sec-5" class="outline-2">
+<h2 id="sec-5"><span class="section-number-2">5</span> CAD files</h2>
+<div class="outline-text-2" id="text-5">
+<p>
+Files can be edited using <a href="https://www.freecadweb.org/">FreeCAD</a>.
+</p>
+
+<ul class="org-ul">
+<li><a href="NanoVNA%20case.FCStd">NanoVNA case</a>
+</li>
+<li><a href="stylus.FCStd">Stylus</a>
+</li>
+</ul>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+<li><a href="#sec-3">3. CAD renderings of assembled covers</a></li>
+<li><a href="#sec-4">4. Ready to print STL files</a></li>
+<li><a href="#sec-5">5. CAD files</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-05-24 P 12:44</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: NanoVNA case
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+
+
+I felt that original NanoVNA case is too fragile for carrying this
+thing around in the bag. Also originally there is no housing for
+calibration and adapter connectors.
+
+[[file:make,%201.png]]
+
+This body/case provides better protection for device.
+
+
+[[file:make,%202.png]]
+
+While external case helps to carry this thing around in the bag, by
+covering touchscreen and housing calibration and adapter connectors.
+
+
+[[file:make.png]]
+
+Stylus / pincers help using touch screen and picking connectors from
+the box.
+
+
+[[file:make,%204.png]]
+
+Cover attaches to the body using [[https://www.amazon.de/gp/product/B00TACKU0O/][3mm x 2mm thick neodymium magnets]].
+
+* CAD renderings of assembled covers
+
+[[file:inner%20body%20assembled.png]]
+CAD drawing for inner box/case.
+
+[[file:assembled.png]]
+CAD drawing for inner box/case within outer box.
+* Ready to print STL files
+
+-----
+
+[[file:inner%20box.stl][download: inner box]]
+
+[[file:inner%20box,%201.png]]
+[[file:inner%20box,%202.png]]
+
+-----
+
+[[file:inner%20cover.stl][download: inner cover]]
+[[file:inner%20cover.png]]
+
+-----
+
+[[file:outer%20box.stl][download: outer box]]
+[[file:outer%20box.png]]
+
+-----
+
+[[file:outer%20cover.stl][download: outer cover]]
+[[file:outer%20cover.png]]
+
+-----
+
+[[file:stylus.stl][download: stylus]]
+[[file:stylus.png]]
+
+* CAD files
+Files can be edited using [[https://www.freecadweb.org/][FreeCAD]].
+
++ [[file:NanoVNA%20case.FCStd][NanoVNA case]]
++ [[file:stylus.FCStd][Stylus]]
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>Nokia 105 (2019) modification for seniors</title>
+<!-- 2020-03-21 Sat 00:36 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Nokia 105 (2019) modification for seniors</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Very old people often have problems with mental abilities, touch and
+vision. When the phone rings it is real issue to figure out what
+button to press and hit the right one to pick up the call. It is easy
+to end up in random phone menus instead that are incomprehensible for
+the elderly.
+</p>
+
+<p>
+Here is solution for the problem in the form of 3D printed case and
+extra add-on button that is glued to the original dial/receive key of
+the phone. All other buttons are rendered inaccessible on purpose.
+</p>
+
+<p>
+For extra clarity, this one important button:
+</p>
+<ul class="org-ul">
+<li>Is painted red.
+</li>
+<li>Has exaggerated surface and relief raising above main case surface.
+</li>
+<li>Has big white circle around it (I used <a href="https://en.wikipedia.org/wiki/Airbrush">airbrush</a> with stencil to
+paint the circle).
+</li>
+</ul>
+</div>
+
+<div id="outline-container-sec-2-1" class="outline-3">
+<h3 id="sec-2-1"><span class="section-number-3">2.1</span> Original Nokia 105 (2019)</h3>
+<div class="outline-text-3" id="text-2-1">
+
+<figure>
+<p><img src="1.png" class="img-responsive" alt="1.png">
+</p>
+</figure>
+
+<p>
+Nokia 105 (2019) allows receiving calls and dialing back the most
+recent call using single dial button (cannot hang up) though. Receiver
+of the call on the other end has to hang up. Prepaid SIM card is used,
+to avoid accidental/unintended charges for whatever reason.
+</p>
+</div>
+</div>
+
+<div id="outline-container-sec-2-2" class="outline-3">
+<h3 id="sec-2-2"><span class="section-number-3">2.2</span> Enlarged dial button</h3>
+<div class="outline-text-3" id="text-2-2">
+
+<figure>
+<p><img src="2.png" class="img-responsive" alt="2.png">
+</p>
+</figure>
+
+<p>
+Download button:
+<img src="button.png" class="img-responsive" alt="button.png">
+</p>
+
+<ul class="org-ul">
+<li><a href="button.FCStd">FreeCAD file</a>
+</li>
+<li><a href="button.stl">STL file</a>
+</li>
+</ul>
+
+
+<p>
+I glued button to the dial key of the phone.
+</p>
+
+
+<figure>
+<p><img src="3.png" class="img-responsive" alt="3.png">
+</p>
+</figure>
+</div>
+</div>
+
+
+
+<div id="outline-container-sec-2-3" class="outline-3">
+<h3 id="sec-2-3"><span class="section-number-3">2.3</span> Body and cover</h3>
+<div class="outline-text-3" id="text-2-3">
+
+<figure>
+<p><img src="body.png" class="img-responsive" alt="body.png">
+</p>
+</figure>
+
+<ul class="org-ul">
+<li>Cover inside:
+<ul class="org-ul">
+<li><img src="cover,%20inside.png" class="img-responsive" alt="cover,%20inside.png">
+</li>
+</ul>
+</li>
+
+<li>Cover outside:
+<ul class="org-ul">
+<li><img src="cover,%20outside.png" class="img-responsive" alt="cover,%20outside.png">
+</li>
+</ul>
+</li>
+
+<li>Download:
+<ul class="org-ul">
+<li><a href="body%20and%20cover.FCStd">body and cover FreeCAD file</a>
+</li>
+<li><a href="body.stl">body in STL format</a>
+</li>
+<li><a href="cover.stl">cover in STL format</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+
+<div id="outline-container-sec-2-4" class="outline-3">
+<h3 id="sec-2-4"><span class="section-number-3">2.4</span> Result</h3>
+<div class="outline-text-3" id="text-2-4">
+<p>
+End result looks like this:
+</p>
+
+
+<figure>
+<p><img src="4.png" class="img-responsive" alt="4.png">
+</p>
+</figure>
+
+<p>
+Connectors for headphones and charging are exposed though the hole in
+the body.
+</p>
+
+
+<figure>
+<p><img src="5.png" class="img-responsive" alt="5.png">
+</p>
+</figure>
+</div>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a>
+<ul class="nav">
+<li><a href="#sec-2-1">2.1. Original Nokia 105 (2019)</a></li>
+<li><a href="#sec-2-2">2.2. Enlarged dial button</a></li>
+<li><a href="#sec-2-3">2.3. Body and cover</a></li>
+<li><a href="#sec-2-4">2.4. Result</a></li>
+</ul>
+</li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-03-21 Sat 00:36</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Nokia 105 (2019) modification for seniors
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+[[file:make.png]]
+
+Very old people often have problems with mental abilities, touch and
+vision. When the phone rings it is real issue to figure out what
+button to press and hit the right one to pick up the call. It is easy
+to end up in random phone menus instead that are incomprehensible for
+the elderly.
+
+Here is solution for the problem in the form of 3D printed case and
+extra add-on button that is glued to the original dial/receive key of
+the phone. All other buttons are rendered inaccessible on purpose.
+
+For extra clarity, this one important button:
++ Is painted red.
++ Has exaggerated surface and relief raising above main case surface.
++ Has big white circle around it (I used [[https://en.wikipedia.org/wiki/Airbrush][airbrush]] with stencil to
+ paint the circle).
+
+** Original Nokia 105 (2019)
+[[file:1.png]]
+
+Nokia 105 (2019) allows receiving calls and dialing back the most
+recent call using single dial button (cannot hang up) though. Receiver
+of the call on the other end has to hang up. Prepaid SIM card is used,
+to avoid accidental/unintended charges for whatever reason.
+
+** Enlarged dial button
+
+[[file:2.png]]
+
+Download button:
+[[file:button.png]]
+
++ [[file:button.FCStd][FreeCAD file]]
++ [[file:button.stl][STL file]]
+
+
+I glued button to the dial key of the phone.
+
+[[file:3.png]]
+
+
+
+** Body and cover
+
+[[file:body.png]]
+
++ Cover inside:
+ + [[file:cover,%20inside.png]]
+
++ Cover outside:
+ + [[file:cover,%20outside.png]]
+
++ Download:
+ + [[file:body%20and%20cover.FCStd][body and cover FreeCAD file]]
+ + [[file:body.stl][body in STL format]]
+ + [[file:cover.stl][cover in STL format]]
+
+
+** Result
+End result looks like this:
+
+[[file:4.png]]
+
+Connectors for headphones and charging are exposed though the hole in
+the body.
+
+[[file:5.png]]
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>DIY USB extension cable</title>
+<!-- 2020-05-21 N 00:35 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">DIY USB extension cable</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+<p>
+Original cable endings could not handle all the twisting, so why not
+to make new and better ones.
+</p>
+
+<p>
+There are 2 designs:
+</p>
+
+<ol class="org-ol">
+<li><a href="#sec-3">PLA + rubber/TPU design</a>
+</li>
+
+<li><a href="#sec-4">TPU only design</a>
+</li>
+</ol>
+</div>
+</div>
+
+<div id="outline-container-sec-3" class="outline-2">
+<h2 id="sec-3"><a id="ID-36c7eef2-83a1-440d-99a6-86d826ba0621" name="ID-36c7eef2-83a1-440d-99a6-86d826ba0621"></a><span class="section-number-2">3</span> PLA + rubber/TPU design</h2>
+<div class="outline-text-2" id="text-3">
+
+<figure>
+<p><img src="PLA%20+%20TPU/make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Following parts are glued together:
+<img src="PLA%20+%20TPU/make,%202.png" class="img-responsive" alt="make,%202.png">
+</p>
+</div>
+
+<div id="outline-container-sec-3-1" class="outline-3">
+<h3 id="sec-3-1"><span class="section-number-3">3.1</span> Male connector case</h3>
+<div class="outline-text-3" id="text-3-1">
+
+<figure>
+<p><img src="PLA%20+%20TPU/male%20connector%20case.png" class="img-responsive" alt="male%20connector%20case.png">
+</p>
+</figure>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="PLA + TPU/male%20connector%20case.FCStd">FreeCAD project</a>
+</li>
+<li><a href="PLA + TPU/male%20connector%20case.stl">STL file</a>
+</li>
+</ul>
+</div>
+</div>
+
+
+<div id="outline-container-sec-3-2" class="outline-3">
+<h3 id="sec-3-2"><span class="section-number-3">3.2</span> Female connector case</h3>
+<div class="outline-text-3" id="text-3-2">
+
+<figure>
+<p><img src="PLA%20+%20TPU/female%20connector%20case,%201.png" class="img-responsive" alt="female%20connector%20case,%201.png">
+</p>
+</figure>
+
+
+<figure>
+<p><img src="PLA%20+%20TPU/female%20connector%20case,%202.png" class="img-responsive" alt="female%20connector%20case,%202.png">
+</p>
+</figure>
+
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="PLA%20+%20TPU/female%20connector%20case.FCStd">FreeCAD project</a>
+</li>
+<li><a href="PLA%20+%20TPU/female%20connector%20case.stl">STL file</a>
+</li>
+</ul>
+</div>
+</div>
+</div>
+
+<div id="outline-container-sec-4" class="outline-2">
+<h2 id="sec-4"><a id="ID-b19bae1f-aa07-438f-aba0-276697a77355" name="ID-b19bae1f-aa07-438f-aba0-276697a77355"></a><span class="section-number-2">4</span> TPU only design for male connector case</h2>
+<div class="outline-text-2" id="text-4">
+
+<figure>
+<p><img src="TPU/make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+3D rendering of the cover:
+<img src="TPU/schematic.png" class="img-responsive" alt="schematic.png">
+</p>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="TPU/USB%20cover.FCStd">FreeCAD project</a>
+</li>
+<li><a href="TPU/USB%20cover.stl">STL file</a>
+</li>
+</ul>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+<li><a href="#sec-3">3. PLA + rubber/TPU design</a>
+<ul class="nav">
+<li><a href="#sec-3-1">3.1. Male connector case</a></li>
+<li><a href="#sec-3-2">3.2. Female connector case</a></li>
+</ul>
+</li>
+<li><a href="#sec-4">4. TPU only design for male connector case</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-05-21 N 00:35</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: DIY USB extension cable
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+Original cable endings could not handle all the twisting, so why not
+to make new and better ones.
+
+There are 2 designs:
+
+1. [[id:36c7eef2-83a1-440d-99a6-86d826ba0621][PLA + rubber/TPU design]]
+
+2. [[id:b19bae1f-aa07-438f-aba0-276697a77355][TPU only design]]
+
+* PLA + rubber/TPU design
+:PROPERTIES:
+:ID: 36c7eef2-83a1-440d-99a6-86d826ba0621
+:END:
+
+[[file:PLA%20+%20TPU/make.png]]
+
+Following parts are glued together:
+[[file:PLA%20+%20TPU/make,%202.png]]
+
+** Male connector case
+[[file:PLA%20+%20TPU/male%20connector%20case.png]]
+
+Download:
+- [[file:PLA + TPU/male%20connector%20case.FCStd][FreeCAD project]]
+- [[file:PLA + TPU/male%20connector%20case.stl][STL file]]
+
+
+** Female connector case
+
+[[file:PLA%20+%20TPU/female%20connector%20case,%201.png]]
+
+[[file:PLA%20+%20TPU/female%20connector%20case,%202.png]]
+
+
+Download:
+- [[file:PLA%20+%20TPU/female%20connector%20case.FCStd][FreeCAD project]]
+- [[file:PLA%20+%20TPU/female%20connector%20case.stl][STL file]]
+
+* TPU only design for male connector case
+:PROPERTIES:
+:ID: b19bae1f-aa07-438f-aba0-276697a77355
+:END:
+
+[[file:TPU/make.png]]
+
+3D rendering of the cover:
+[[file:TPU/schematic.png]]
+
+Download:
+- [[file:TPU/USB%20cover.FCStd][FreeCAD project]]
+- [[file:TPU/USB%20cover.stl][STL file]]
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>Book stand</title>
+<!-- 2020-05-02 Sat 22:48 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Book stand</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Small book stand.
+</p>
+
+
+<figure>
+<p><img src="book%20stand.png" class="img-responsive" alt="book%20stand.png">
+</p>
+</figure>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="book%20stand.stl">STL file</a>
+</li>
+<li><a href="book%20stand.FCStd">FreeCAD file</a>
+</li>
+</ul>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-05-02 Sat 22:48</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Book stand
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+[[file:make.png]]
+
+Small book stand.
+
+[[file:book%20stand.png]]
+
+Download:
++ [[file:book%20stand.stl][STL file]]
++ [[file:book%20stand.FCStd][FreeCAD file]]
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>Cable organizer</title>
+<!-- 2020-03-21 Sat 00:37 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Cable organizer</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+I have lots of wires in my lab, and I need quick access to them. This
+organizer allows to conveniently hang them on the wall. I use double
+sided tape to make it stick.
+</p>
+
+
+<figure>
+<p><img src="body.png" class="img-responsive" alt="body.png">
+</p>
+</figure>
+</div>
+</div>
+
+<div id="outline-container-sec-3" class="outline-2">
+<h2 id="sec-3"><span class="section-number-2">3</span> Files</h2>
+<div class="outline-text-2" id="text-3">
+<p>
+You can <a href="body.FCStd">download FreeCAD project</a> file to tweak design or generated STL
+file ready for 3D printing:
+</p>
+
+<ul class="org-ul">
+<li><a href="body.stl">body.stl</a>
+</li>
+</ul>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+<li><a href="#sec-3">3. Files</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-03-21 Sat 00:37</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Cable organizer
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+[[file:make.png]]
+
+I have lots of wires in my lab, and I need quick access to them. This
+organizer allows to conveniently hang them on the wall. I use double
+sided tape to make it stick.
+
+[[file:body.png]]
+
+* Files
+You can [[file:body.FCStd][download FreeCAD project]] file to tweak design or generated STL
+file ready for 3D printing:
+
++ [[file:body.stl]]
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>Alpha Tools digital calipers mod and container box</title>
+<!-- 2020-03-21 Sat 00:37 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Alpha Tools digital calipers mod and container box</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+
+<figure>
+<p><img src="make,%203.png" class="img-responsive" alt="make,%203.png">
+</p>
+</figure>
+
+<p>
+As regular user of this tool, I got annoyed that original cell
+batteries run empty so fast and I have to worry about finding
+replacements.
+</p>
+
+
+<figure>
+<p><img src="make,%202.png" class="img-responsive" alt="make,%202.png">
+</p>
+</figure>
+
+<p>
+So I added AAA battery compartment to the bottom, and now I can use
+relatively large capacity and rechargeable NiMH batteries.
+</p>
+
+
+<figure>
+<p><img src="make,%201.png" class="img-responsive" alt="make,%201.png">
+</p>
+</figure>
+
+<p>
+The new problem I got is, how can I store and carry this thing
+around. So special case is designed.
+</p>
+
+
+<figure>
+<p><img src="box.png" class="img-responsive" alt="box.png">
+</p>
+</figure>
+
+<p>
+And special cover. Design utilizes <a href="https://www.amazon.de/gp/product/B00TACKU0O/">3mm x 2mm thick neodymium magnets</a>
+to keep cover magnetically attached to storage box.
+</p>
+
+
+<figure>
+<p><img src="cover.png" class="img-responsive" alt="cover.png">
+</p>
+</figure>
+
+<p>
+My printer can print only 120x120x120 mm objects. So only the most
+delicate part is protected. There is some empty space in the box
+because of geometry of the tool. It can be used as small storage
+compartments for something.
+</p>
+
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Closed box:
+<img src="make,%204.png" class="img-responsive" alt="make,%204.png">
+</p>
+</div>
+</div>
+
+<div id="outline-container-sec-3" class="outline-2">
+<h2 id="sec-3"><span class="section-number-2">3</span> Files</h2>
+<div class="outline-text-2" id="text-3">
+<p>
+You can <a href="box%20and%20cover.FCStd">download FreeCAD project</a> file to tweak design or generated STL
+files ready for 3D printing:
+</p>
+
+<ul class="org-ul">
+<li><a href="box.stl">box.stl</a>
+</li>
+<li><a href="cover.stl">cover.stl</a>
+</li>
+</ul>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+<li><a href="#sec-3">3. Files</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-03-21 Sat 00:37</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Alpha Tools digital calipers mod and container box
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+[[file:make,%203.png]]
+
+As regular user of this tool, I got annoyed that original cell
+batteries run empty so fast and I have to worry about finding
+replacements.
+
+[[file:make,%202.png]]
+
+So I added AAA battery compartment to the bottom, and now I can use
+relatively large capacity and rechargeable NiMH batteries.
+
+[[file:make,%201.png]]
+
+The new problem I got is, how can I store and carry this thing
+around. So special case is designed.
+
+[[file:box.png]]
+
+And special cover. Design utilizes [[https://www.amazon.de/gp/product/B00TACKU0O/][3mm x 2mm thick neodymium magnets]]
+to keep cover magnetically attached to storage box.
+
+[[file:cover.png]]
+
+My printer can print only 120x120x120 mm objects. So only the most
+delicate part is protected. There is some empty space in the box
+because of geometry of the tool. It can be used as small storage
+compartments for something.
+
+[[file:make.png]]
+
+Closed box:
+[[file:make,%204.png]]
+
+* Files
+You can [[file:box%20and%20cover.FCStd][download FreeCAD project]] file to tweak design or generated STL
+files ready for 3D printing:
+
++ [[file:box.stl]]
++ [[file:cover.stl]]
--- /dev/null
+% Created 2020-02-29 L 00:34
+% Intended LaTeX compiler: pdflatex
+\documentclass[11pt]{article}
+\usepackage[utf8]{inputenc}
+\usepackage[T1]{fontenc}
+\usepackage{graphicx}
+\usepackage{grffile}
+\usepackage{longtable}
+\usepackage{wrapfig}
+\usepackage{rotating}
+\usepackage[normalem]{ulem}
+\usepackage{amsmath}
+\usepackage{textcomp}
+\usepackage{amssymb}
+\usepackage{capt-of}
+\usepackage{hyperref}
+\author{Svjatoslav Agejenko}
+\date{\today}
+\title{Alpha Tools digital calipers mod and container box}
+\hypersetup{
+ pdfauthor={Svjatoslav Agejenko},
+ pdftitle={Alpha Tools digital calipers mod and container box},
+ pdfkeywords={},
+ pdfsubject={},
+ pdfcreator={Emacs 26.1 (Org mode 9.1.9)},
+ pdflang={English}}
+\begin{document}
+
+\maketitle
+\tableofcontents
+
+
+\section{General}
+\label{sec:orgcf86045}
+\begin{itemize}
+\item DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+
+\item Author:
+\begin{itemize}
+\item Svjatoslav Agejenko
+\item Homepage: \url{https://svjatoslav.eu}
+\item Email: \href{mailto://svjatoslav@svjatoslav.eu}{svjatoslav@svjatoslav.eu}
+\end{itemize}
+
+\item See also:
+\begin{itemize}
+\item \href{../../index.html}{Other physical projects in this repository}
+\item \href{https://www.svjatoslav.eu/projects/}{Other projects hosted at svjatoslav.eu}
+\end{itemize}
+\end{itemize}
+
+\section{Project description}
+\label{sec:org74ad9cd}
+\begin{center}
+\includegraphics[width=.9\linewidth]{make,%201.png}
+\end{center}
+
+As regular user of this tool, I got annoyed that cell battery run
+empty so fast and I have to worry about finding replacements. So I
+added AAA battery compartment to the bottom, and now I can use
+relatively large capacity and rechargeable NiMH batteries.
+
+The new problem I got is, how can I store and carry this thing
+around. So special case is designed.
+
+\begin{center}
+\includegraphics[width=.9\linewidth]{make.png}
+\end{center}
+
+Design utilizes \href{https://www.amazon.de/gp/product/B00TACKU0O/}{3mm x 2mm thick neodymium magnets}.
+\section{Files}
+\label{sec:org42557cd}
+You can \href{body\%20and\%20cover.FCStd}{download FreeCAD project} file to tweak design or generated STL
+files ready for 3D printing:
+
+\begin{itemize}
+\item Body: \href{body.stl}{download STL}
+\begin{itemize}
+\item \begin{center}
+\includegraphics[width=.9\linewidth]{body.png}
+\end{center}
+\end{itemize}
+
+\item Cover: \href{cover.stl}{download STL}
+\begin{itemize}
+\item \begin{center}
+\includegraphics[width=.9\linewidth]{cover.png}
+\end{center}
+\end{itemize}
+\end{itemize}
+\end{document}
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>Macro filter storage compartment</title>
+<!-- 2020-03-21 Sat 00:37 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Macro filter storage compartment</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Case for 52mm <a href="https://en.wikipedia.org/wiki/Close-up_lens">macro filter</a>.
+</p>
+
+<ul class="org-ul">
+<li>Body:
+<ul class="org-ul">
+<li><img src="body.png" class="img-responsive" alt="body.png">
+</li>
+</ul>
+</li>
+
+<li>Cover:
+<ul class="org-ul">
+<li><img src="cover.png" class="img-responsive" alt="cover.png">
+</li>
+</ul>
+</li>
+</ul>
+
+
+<p>
+Download:
+</p>
+<table class="table table-striped table-bordered table-hover table-condensed">
+
+
+<colgroup>
+<col class="left">
+
+<col class="left">
+
+<col class="left">
+</colgroup>
+<thead>
+<tr>
+<th scope="col" class="text-left">item</th>
+<th scope="col" class="text-left">FreeCAD file</th>
+<th scope="col" class="text-left">STL file</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="text-left">body</td>
+<td class="text-left"><a href="body.FCStd">download</a></td>
+<td class="text-left"><a href="body.stl">download</a></td>
+</tr>
+
+<tr>
+<td class="text-left">cover</td>
+<td class="text-left"><a href="cover.FCStd">download</a></td>
+<td class="text-left"><a href="cover.stl">download</a></td>
+</tr>
+</tbody>
+</table>
+
+<p>
+See also:
+</p>
+<ul class="org-ul">
+<li><a href="../Fujifilm%20camera%20battery%20box/index.html">Fujifilm camera battery box</a>
+</li>
+</ul>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-03-21 Sat 00:37</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Macro filter storage compartment
+#+author: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+[[file:make.png]]
+
+Case for 52mm [[https://en.wikipedia.org/wiki/Close-up_lens][macro filter]].
+
++ Body:
+ + [[file:body.png]]
+
++ Cover:
+ + [[file:cover.png]]
+
+
+Download:
+| item | FreeCAD file | STL file |
+|-------+--------------+----------|
+| body | [[file:body.FCStd][download]] | [[file:body.stl][download]] |
+| cover | [[file:cover.FCStd][download]] | [[file:cover.stl][download]] |
+
+See also:
++ [[file:../Fujifilm%20camera%20battery%20box/index.html][Fujifilm camera battery box]]
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>Case for microscope slides and cover slips.</title>
+<!-- 2020-03-21 Sat 00:38 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Case for microscope slides and cover slips.</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Case for microscope slides and cover slips. Design utilizes <a href="https://www.amazon.de/gp/product/B00TACKU0O/">3mm x 2mm
+thick neodymium magnets</a>. Holes for magnets are made intentionally bit
+larger for magnets to easily fit in. You would need glue to fix
+magnets in holes.
+</p>
+
+<ul class="org-ul">
+<li>Can fit:
+<ul class="org-ul">
+<li>10x slides (25.5mm x 75.5mm x 1.5mm)
+</li>
+<li>10x cover slips: (20.5 x 20.5 x 0.5mm)
+</li>
+</ul>
+</li>
+
+<li>Parts:
+<ul class="org-ul">
+<li>Body:
+<ul class="org-ul">
+<li><img src="body.png" class="img-responsive" alt="body.png">
+</li>
+</ul>
+</li>
+
+<li>Cover:
+<ul class="org-ul">
+<li><img src="cover.png" class="img-responsive" alt="cover.png">
+</li>
+</ul>
+</li>
+</ul>
+</li>
+</ul>
+
+<p>
+Download:
+</p>
+<table class="table table-striped table-bordered table-hover table-condensed">
+
+
+<colgroup>
+<col class="left">
+
+<col class="left">
+
+<col class="left">
+</colgroup>
+<thead>
+<tr>
+<th scope="col" class="text-left">item</th>
+<th scope="col" class="text-left">FreeCAD file</th>
+<th scope="col" class="text-left">STL file</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td class="text-left">body</td>
+<td class="text-left"><a href="body.FCStd">download</a></td>
+<td class="text-left"><a href="body.stl">download</a></td>
+</tr>
+
+<tr>
+<td class="text-left">cover</td>
+<td class="text-left"><a href="cover.FCStd">download</a></td>
+<td class="text-left"><a href="cover.stl">download</a></td>
+</tr>
+</tbody>
+</table>
+
+<p>
+See also:
+</p>
+<ul class="org-ul">
+<li><a href="../../optics/Fujifilm%20X-mount%20microscope%20adapter/">Fujifilm microscope adapter</a>
+</li>
+</ul>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-03-21 Sat 00:38</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Case for microscope slides and cover slips.
+#+author: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+[[file:make.png]]
+
+Case for microscope slides and cover slips. Design utilizes [[https://www.amazon.de/gp/product/B00TACKU0O/][3mm x 2mm
+thick neodymium magnets]]. Holes for magnets are made intentionally bit
+larger for magnets to easily fit in. You would need glue to fix
+magnets in holes.
+
++ Can fit:
+ + 10x slides (25.5mm x 75.5mm x 1.5mm)
+ + 10x cover slips: (20.5 x 20.5 x 0.5mm)
+
++ Parts:
+ + Body:
+ + [[file:body.png]]
+
+ + Cover:
+ + [[file:cover.png]]
+
+Download:
+| item | FreeCAD file | STL file |
+|-------+--------------+----------|
+| body | [[file:body.FCStd][download]] | [[file:body.stl][download]] |
+| cover | [[file:cover.FCStd][download]] | [[file:cover.stl][download]] |
+
+See also:
++ [[file:../../optics/Fujifilm%20X-mount%20microscope%20adapter/][Fujifilm microscope adapter]]
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>27mm and 55mm rolls</title>
+<!-- 2020-04-30 N 19:05 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">27mm and 55mm rolls</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+I am a big fan of <a href="https://www.thingiverse.com/thing:2471753">stackable bins organizer</a>. I find 2x2 bins with 21mm
+height are particularly good for storing rolls of wire. Also electric
+handheld screwdriver is good for twisting wire onto the
+roll. Therefore I designed rolls that have standard hexagonal hole on
+the bottom (for screwdriver compatibility):
+</p>
+
+
+<figure>
+<p><img src="roll%2027mm,%20body,%202.png" class="img-responsive" alt="roll%2027mm,%20body,%202.png">
+</p>
+</figure>
+
+<p>
+and 20mm total roll height, to be used with stackable bins
+organizer. Rolls are made from body and cover:
+</p>
+
+<ul class="org-ul">
+<li>Body:
+<ul class="org-ul">
+<li><img src="roll%2027mm,%20body.png" class="img-responsive" alt="roll%2027mm,%20body.png">
+</li>
+</ul>
+</li>
+
+<li>Cover:
+<ul class="org-ul">
+<li><img src="roll%2027mm,%20cover.png" class="img-responsive" alt="roll%2027mm,%20cover.png">
+</li>
+</ul>
+</li>
+</ul>
+
+<p>
+After printing, both parts have to be glued together. This is to avoid
+overhangs that are hard to print.
+</p>
+</div>
+</div>
+
+<div id="outline-container-sec-3" class="outline-2">
+<h2 id="sec-3"><span class="section-number-2">3</span> 27mm diameter roll</h2>
+<div class="outline-text-2" id="text-3">
+
+<figure>
+<p><img src="roll%2027mm,%20assembled.png" class="img-responsive" alt="roll%2027mm,%20assembled.png">
+</p>
+</figure>
+
+
+<figure>
+<p><img src="roll%2027mm,%20assembled,%202.png" class="img-responsive" alt="roll%2027mm,%20assembled,%202.png">
+</p>
+</figure>
+
+<ul class="org-ul">
+<li><a href="roll%2027mm,%20body.stl">body STL</a>
+</li>
+<li><a href="roll%2027mm,%20cover.stl">cover STL</a>
+</li>
+<li><a href="roll%2027mm.FCStd">FreeCAD file</a>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-4" class="outline-2">
+<h2 id="sec-4"><span class="section-number-2">4</span> 55mm diameter roll</h2>
+<div class="outline-text-2" id="text-4">
+
+<figure>
+<p><img src="roll%2055mm,%20assembled.png" class="img-responsive" alt="roll%2055mm,%20assembled.png">
+</p>
+</figure>
+
+<ul class="org-ul">
+<li><a href="roll%2055mm,%20body.stl">body STL</a>
+</li>
+<li><a href="roll%2055mm,%20cover.stl">cover STL</a>
+</li>
+<li><a href="roll%2055mm.FCStd">FreeCAD file</a>
+</li>
+</ul>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+<li><a href="#sec-3">3. 27mm diameter roll</a></li>
+<li><a href="#sec-4">4. 55mm diameter roll</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-04-30 N 19:05</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: 27mm and 55mm rolls
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+[[file:make.png]]
+
+I am a big fan of [[https://www.thingiverse.com/thing:2471753][stackable bins organizer]]. I find 2x2 bins with 21mm
+height are particularly good for storing rolls of wire. Also electric
+handheld screwdriver is good for twisting wire onto the
+roll. Therefore I designed rolls that have standard hexagonal hole on
+the bottom (for screwdriver compatibility):
+
+[[file:roll%2027mm,%20body,%202.png]]
+
+and 20mm total roll height, to be used with stackable bins
+organizer. Rolls are made from body and cover:
+
+- Body:
+ - [[file:roll%2027mm,%20body.png]]
+
+- Cover:
+ - [[file:roll%2027mm,%20cover.png]]
+
+After printing, both parts have to be glued together. This is to avoid
+overhangs that are hard to print.
+
+* 27mm diameter roll
+
+[[file:roll%2027mm,%20assembled.png]]
+
+[[file:roll%2027mm,%20assembled,%202.png]]
+
+- [[file:roll%2027mm,%20body.stl][body STL]]
+- [[file:roll%2027mm,%20cover.stl][cover STL]]
+- [[file:roll%2027mm.FCStd][FreeCAD file]]
+
+* 55mm diameter roll
+
+[[file:roll%2055mm,%20assembled.png]]
+
+- [[file:roll%2055mm,%20body.stl][body STL]]
+- [[file:roll%2055mm,%20cover.stl][cover STL]]
+- [[file:roll%2055mm.FCStd][FreeCAD file]]
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>Tiny wall shelf</title>
+<!-- 2020-03-29 P 12:06 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Tiny wall shelf</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+My current printer does at most 120x120x120 (mm) prints. And I needed
+a small wall shelf for my lab. Here comes design for 119x119x119 (just
+in case). I used double sided tape for wall attachment.
+</p>
+
+
+<figure>
+<p><img src="shelf.png" class="img-responsive" alt="shelf.png">
+</p>
+</figure>
+
+<ul class="org-ul">
+<li>Download:
+<ul class="org-ul">
+<li><a href="shelf.stl">Printable STL file.</a>
+</li>
+<li><a href="shelf.FCStd">Editable FreeCAD file.</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-03-29 P 12:06</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Tiny wall shelf
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+[[file:make.png]]
+
+My current printer does at most 120x120x120 (mm) prints. And I needed
+a small wall shelf for my lab. Here comes design for 119x119x119 (just
+in case). I used double sided tape for wall attachment.
+
+[[file:shelf.png]]
+
+- Download:
+ - [[file:shelf.stl][Printable STL file.]]
+ - [[file:shelf.FCStd][Editable FreeCAD file.]]
--- /dev/null
+EESchema Schematic File Version 4
+EELAYER 30 0
+EELAYER END
+$Descr A4 11693 8268
+encoding utf-8
+Sheet 6 6
+Title ""
+Date ""
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+Text HLabel 3900 3350 0 50 Input ~ 0
+V_in
+Text HLabel 4450 3350 2 50 Input ~ 0
+V_out
+Text HLabel 4150 3650 0 50 BiDi ~ 0
+GND
+$EndSCHEMATC
--- /dev/null
+EESchema Schematic File Version 4
+EELAYER 30 0
+EELAYER END
+$Descr A4 11693 8268
+encoding utf-8
+Sheet 6 6
+Title ""
+Date ""
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+Text HLabel 3900 3350 0 50 Input ~ 0
+V_in
+Text HLabel 4450 3350 2 50 Input ~ 0
+V_out
+Text HLabel 4150 3650 0 50 BiDi ~ 0
+GND
+$EndSCHEMATC
--- /dev/null
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
+#
+# Connector_Conn_WallPlug
+#
+DEF Connector_Conn_WallPlug P 0 0 Y Y 1 F N
+F0 "P" -50 175 50 H V C BNN
+F1 "Connector_Conn_WallPlug" -225 0 50 V V C BNN
+F2 "" 400 0 50 H I C CNN
+F3 "" 400 0 50 H I C CNN
+DRAW
+A -125 0 150 -899 899 0 1 10 f -125 -150 -125 150
+P 2 0 1 20 -175 -100 -25 -100 N
+P 2 0 1 20 -175 100 -25 100 N
+P 2 0 1 10 -125 -150 -125 150 N
+P 2 0 1 0 -25 -100 100 -100 N
+P 2 0 1 0 -25 100 100 100 N
+X AC_P 1 200 100 200 L 50 50 1 1 w
+X AC_N 2 200 -100 200 L 50 50 1 1 w
+ENDDRAW
+ENDDEF
+#
+# Connector_USB_A
+#
+DEF Connector_USB_A J 0 40 Y Y 1 F N
+F0 "J" -200 450 50 H V L CNN
+F1 "Connector_USB_A" -200 350 50 H V L CNN
+F2 "" 150 -50 50 H I C CNN
+F3 "" 150 -50 50 H I C CNN
+$FPLIST
+ USB*
+$ENDFPLIST
+DRAW
+C -150 85 25 0 1 10 F
+C -25 135 15 0 1 10 F
+S -200 -300 200 300 0 1 10 f
+S -60 190 -170 210 0 1 0 F
+S -50 180 -180 230 0 1 0 N
+S -5 -300 5 -270 0 1 0 N
+S 10 50 -20 20 0 1 10 F
+S 200 -105 170 -95 0 1 0 N
+S 200 -5 170 5 0 1 0 N
+S 200 195 170 205 0 1 0 N
+P 4 0 1 10 -125 85 -100 85 -50 135 -25 135 N
+P 4 0 1 10 -100 85 -75 85 -50 35 0 35 N
+P 4 0 1 10 25 110 25 60 75 85 25 110 F
+P 2 1 1 10 -75 85 25 85 N
+X VBUS 1 300 200 100 L 50 50 1 1 W
+X D- 2 300 -100 100 L 50 50 1 1 P
+X D+ 3 300 0 100 L 50 50 1 1 P
+X GND 4 0 -400 100 U 50 50 1 1 W
+X Shield 5 -100 -400 100 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_C
+#
+DEF Device_C C 0 10 N Y 1 F N
+F0 "C" 25 100 50 H V L CNN
+F1 "Device_C" 25 -100 50 H V L CNN
+F2 "" 38 -150 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ C_*
+$ENDFPLIST
+DRAW
+P 2 0 1 20 -80 -30 80 -30 N
+P 2 0 1 20 -80 30 80 30 N
+X ~ 1 0 150 110 D 50 50 1 1 P
+X ~ 2 0 -150 110 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_D_Bridge_+-AA
+#
+DEF Device_D_Bridge_+-AA D 0 0 Y Y 1 F N
+F0 "D" 100 275 50 H V L CNN
+F1 "Device_D_Bridge_+-AA" 100 200 50 H V L CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ D*Bridge*
+ D*Rectifier*
+$ENDFPLIST
+DRAW
+C -200 0 10 0 1 0 F
+C 0 -200 10 0 1 0 F
+C 0 200 10 0 1 0 F
+C 200 0 10 0 1 0 F
+P 2 0 1 10 -100 150 -50 100 N
+P 2 0 1 10 -50 -100 -100 -150 N
+P 2 0 1 10 100 -50 150 -100 N
+P 2 0 1 10 100 50 150 100 N
+P 4 0 1 10 -150 100 -100 50 -75 125 -150 100 N
+P 4 0 1 10 -100 -50 -150 -100 -75 -125 -100 -50 N
+P 4 0 1 10 50 100 100 150 125 75 50 100 N
+P 4 0 1 10 125 -75 50 -100 100 -150 125 -75 N
+P 5 0 1 0 -200 0 0 -200 200 0 0 200 -200 0 N
+X + 1 300 0 100 L 50 50 1 1 P
+X - 2 -300 0 100 R 50 50 1 1 P
+X ~~ 3 0 300 100 D 50 50 1 1 P
+X ~~ 4 0 -300 100 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_R
+#
+DEF Device_R R 0 0 N Y 1 F N
+F0 "R" 80 0 50 V V C CNN
+F1 "Device_R" 0 0 50 V V C CNN
+F2 "" -70 0 50 V I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ R_*
+$ENDFPLIST
+DRAW
+S -40 -100 40 100 0 1 10 N
+X ~ 1 0 150 50 D 50 50 1 1 P
+X ~ 2 0 -150 50 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_Transformer_1P_1S
+#
+DEF Device_Transformer_1P_1S T 0 40 Y N 1 F N
+F0 "T" 0 250 50 H V C CNN
+F1 "Device_Transformer_1P_1S" 0 -300 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+A -100 -150 50 899 1 0 1 0 N -100 -100 -50 -150
+A -100 -150 50 -1 -899 0 1 0 N -50 -150 -100 -199
+A -100 -50 50 899 1 0 1 0 N -100 0 -50 -50
+A -100 -50 50 -1 -899 0 1 0 N -50 -50 -100 -99
+A -100 50 50 899 1 0 1 0 N -100 100 -50 50
+A -100 50 50 -1 -899 0 1 0 N -50 50 -100 1
+A -100 150 50 899 1 0 1 0 N -100 200 -50 150
+A -100 150 50 -1 -899 0 1 0 N -50 150 -100 101
+A 100 -50 50 899 -1799 0 1 0 N 100 0 51 -50
+A 100 -50 50 1799 -899 0 1 0 N 51 -50 100 -99
+A 100 50 50 899 -1799 0 1 0 N 100 100 51 50
+A 100 50 50 1799 -899 0 1 0 N 51 50 100 1
+A 100 150 50 899 -1799 0 1 0 N 100 200 51 150
+A 100 150 50 1799 -899 0 1 0 N 51 150 100 101
+A 101 -150 50 910 -1799 0 1 0 N 101 -100 52 -150
+A 101 -150 50 -912 -1799 0 1 0 N 101 -199 52 -150
+P 2 0 1 0 -25 200 -25 -200 N
+P 2 0 1 0 25 -200 25 200 N
+X AA 1 -400 200 300 R 50 50 1 1 P
+X AB 2 -400 -200 300 R 50 50 1 1 P
+X SA 3 400 -200 300 L 50 50 1 1 P
+X SB 4 400 200 300 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_Voltmeter_DC
+#
+DEF Device_Voltmeter_DC MES 0 1 N N 1 F N
+F0 "MES" -130 40 50 H V R CNN
+F1 "Device_Voltmeter_DC" -130 -30 50 H V R CNN
+F2 "" 0 100 50 V I C CNN
+F3 "" 0 100 50 V I C CNN
+DRAW
+C 0 0 100 0 1 10 N
+T 0 0 0 100 0 0 0 V Normal 0 C C
+P 2 0 0 0 -125 -125 -75 -75 N
+P 2 0 0 0 75 75 125 125 N
+P 3 0 0 0 75 125 125 125 125 75 N
+P 2 0 1 0 10 150 30 150 N
+P 2 0 1 0 20 160 20 140 N
+X - 1 0 -200 100 U 50 50 1 1 P
+X + 2 0 200 100 D 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Regulator_Linear_LM317_3PinPackage
+#
+DEF Regulator_Linear_LM317_3PinPackage U 0 10 Y Y 1 F N
+F0 "U" -150 125 50 H V C CNN
+F1 "Regulator_Linear_LM317_3PinPackage" 0 125 50 H V L CNN
+F2 "" 0 250 50 H I C CIN
+F3 "" 0 0 50 H I C CNN
+ALIAS AZ1117-ADJ
+$FPLIST
+ SOT?223*
+ SOT?89*
+ TO?220*
+ TO?252*
+ TO?263*
+$ENDFPLIST
+DRAW
+S -200 75 200 -200 0 1 10 f
+X ADJ 1 0 -300 100 U 50 50 1 1 I
+X VO 2 300 0 100 L 50 50 1 1 w
+X VI 3 -300 0 100 R 50 50 1 1 W
+ENDDRAW
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+#
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+F3 "" 0 0 50 H I C CNN
+DRAW
+C -80 -100 20 0 0 0 N
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+C 80 -100 20 0 0 0 N
+C 80 100 20 0 0 0 N
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+#
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+#
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+#
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--- /dev/null
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--- /dev/null
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+$EndComp
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+$EndComp
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+L power:GND #PWR016
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+U 1 1 5F10B6BB
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+F 0 "J3" H 2807 5317 50 0000 C CNN
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+Wire Wire Line
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+L Connector:USB_A J6
+U 1 1 5F10B6C6
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+F 0 "J6" H 3607 5317 50 0000 C CNN
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+ 1 3550 4850
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+$EndComp
+Wire Wire Line
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+L power:GND #PWR05
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+F 3 "" H 2750 5300 50 0001 C CNN
+ 1 2750 5300
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+$EndComp
+$Comp
+L power:GND #PWR08
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+ 1 3550 5300
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+$EndComp
+Wire Wire Line
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+Wire Wire Line
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+L Connector:USB_A J9
+U 1 1 5F10B6F3
+P 4350 4850
+F 0 "J9" H 4407 5317 50 0000 C CNN
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+F 2 "" H 4500 4800 50 0001 C CNN
+F 3 " ~" H 4500 4800 50 0001 C CNN
+ 1 4350 4850
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+$EndComp
+Wire Wire Line
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+L power:GND #PWR011
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+F 3 "" H 4350 5300 50 0001 C CNN
+ 1 4350 5300
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+$EndComp
+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+L Device:C C4
+U 1 1 5F10B718
+P 4900 5150
+F 0 "C4" H 5015 5196 50 0000 L CNN
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+F 2 "" H 4938 5000 50 0001 C CNN
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+ 1 4900 5150
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+Wire Wire Line
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+L power:GND #PWR014
+U 1 1 5F10B724
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+F 0 "#PWR014" H 4900 5150 50 0001 C CNN
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+ 1 4900 5400
+ 1 0 0 -1
+$EndComp
+Wire Wire Line
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+L Device:C C7
+U 1 1 5F10B72F
+P 5250 4800
+F 0 "C7" H 5365 4846 50 0000 L CNN
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+F 2 "" H 5288 4650 50 0001 C CNN
+F 3 "~" H 5250 4800 50 0001 C CNN
+ 1 5250 4800
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+$EndComp
+Wire Wire Line
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+$Comp
+L power:GND #PWR017
+U 1 1 5F10B73B
+P 5250 5050
+F 0 "#PWR017" H 5250 4800 50 0001 C CNN
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+F 2 "" H 5250 5050 50 0001 C CNN
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+ 1 5250 5050
+ 1 0 0 -1
+$EndComp
+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Connection ~ 2050 4000
+Connection ~ 3450 5600
+$EndSCHEMATC
--- /dev/null
+EESchema Schematic File Version 4
+EELAYER 30 0
+EELAYER END
+$Descr A4 11693 8268
+encoding utf-8
+Sheet 6 6
+Title ""
+Date ""
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+$Comp
+L Connector:USB_A J1
+U 1 1 5F0CC9AF
+P 2750 1650
+F 0 "J1" H 2807 2117 50 0000 C CNN
+F 1 "USB_A" H 2807 2026 50 0000 C CNN
+F 2 "" H 2900 1600 50 0001 C CNN
+F 3 " ~" H 2900 1600 50 0001 C CNN
+ 1 2750 1650
+ 1 0 0 -1
+$EndComp
+Wire Wire Line
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+$Comp
+L Connector:USB_A J4
+U 1 1 5F0CE176
+P 3550 1650
+F 0 "J4" H 3607 2117 50 0000 C CNN
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+F 2 "" H 3700 1600 50 0001 C CNN
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+$EndComp
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+$Comp
+L power:GND #PWR03
+U 1 1 5F0CF308
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+F 0 "#PWR03" H 2750 1850 50 0001 C CNN
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+F 2 "" H 2750 2100 50 0001 C CNN
+F 3 "" H 2750 2100 50 0001 C CNN
+ 1 2750 2100
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+$EndComp
+$Comp
+L power:GND #PWR06
+U 1 1 5F0CF8C4
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+$EndComp
+Wire Wire Line
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+Text HLabel 1100 950 0 50 Input ~ 0
+5V
+Wire Wire Line
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+Text HLabel 1100 1250 0 50 Input ~ 0
+GND
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+Battery
+$Comp
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+U 1 1 5F0D429A
+P 1200 1300
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+Wire Wire Line
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+L power:GND #PWR09
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+Wire Wire Line
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+Wire Wire Line
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+P 4900 1950
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+Wire Wire Line
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+L power:GND #PWR015
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+F 2 "" H 5250 1850 50 0001 C CNN
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+$EndComp
+Wire Wire Line
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+U 1 1 5F0DE4EE
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+F 0 "J2" H 2807 3717 50 0000 C CNN
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+F 2 "" H 2900 3200 50 0001 C CNN
+F 3 " ~" H 2900 3200 50 0001 C CNN
+ 1 2750 3250
+ 1 0 0 -1
+$EndComp
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+U 1 1 5F0DE4F9
+P 3550 3250
+F 0 "J5" H 3607 3717 50 0000 C CNN
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+$EndComp
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+L power:GND #PWR07
+U 1 1 5F0DE513
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+ 1 3550 3700
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+Wire Wire Line
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+Wire Wire Line
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+$Comp
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+U 1 1 5F0DE52A
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+F 0 "J8" H 4407 3717 50 0000 C CNN
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+ 1 4350 3250
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+$EndComp
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+Wire Wire Line
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+Wire Wire Line
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+L power:GND #PWR010
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+F 2 "" H 4350 3700 50 0001 C CNN
+F 3 "" H 4350 3700 50 0001 C CNN
+ 1 4350 3700
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+$EndComp
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+Wire Wire Line
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+U 1 1 5F0DE54F
+P 4900 3550
+F 0 "C3" H 5015 3596 50 0000 L CNN
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+ 1 4900 3550
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+$EndComp
+Wire Wire Line
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+Connection ~ 4900 3250
+$Comp
+L power:GND #PWR013
+U 1 1 5F0DE55B
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+F 0 "#PWR013" H 4900 3550 50 0001 C CNN
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+<!doctype html>
+<html lang="en">
+<head>
+<title>Battery charger and dual power supply unit</title>
+<!-- 2020-07-12 Sun 02:52 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
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+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
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+
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+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
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+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
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+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
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+
+/* from twbs docs */
+
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+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
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+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
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+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
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+.bs-docs-sidebar .nav > .active:hover > a,
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+ font-weight: bold;
+ color: #A1283B;
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+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
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+ .bs-docs-sidebar.affix-bottom {
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+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
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+</style>
+<script type="text/javascript">
+$(function() {
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+ $('.bs-docs-sidebar li').first().addClass('active');
+
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+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Battery charger and dual power supply unit</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Authors:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+<ul class="org-ul">
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>Valeria Agejenko
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+<p>
+I needed dual voltage power supply for my lab that runs on mains
+electricity (wall power) and slowly charges attached 12V Lead-Acid
+battery. Lead-acid battery in turn provides high current when needed
+as well as power in portable situations or when mains electricity is
+not available.
+</p>
+
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Power supply provides about 13 Volts and 5 Volts simultaneously.
+</p>
+
+<p>
+!!!WARNING!!! I use USB-A connectors for power output, but IT IS NOT
+COMPATIBLE WITH USB DEVICES AND POSSIBLY WITH EXISTING USB CABLES.
+</p>
+
+<p>
+Normal USB devices and cables should not be plugged in! It would
+damage device/cable and likely power supply.
+</p>
+
+<p>
+I found USB-A connectors to be easily available, cheap, reliable and
+functional, so I re-purposed connector for my own needs but I'm using
+totally incompatible electrical wiring.
+</p>
+
+
+<figure>
+<p><img src="connector%20terminal/USB%20hack.png" class="img-responsive" alt="USB%20hack.png">
+</p>
+</figure>
+
+<p>
+As seen, it has dual voltage output. Additionally one wire is
+dedicated to data transmission and can be used with <a href="https://en.wikipedia.org/wiki/1-Wire">1-wire</a>
+protocol. Power supply simply passively links all data wires together
+but does not participate in communication.
+</p>
+
+<p>
+Power supply uses 3D printed body with lots of holes, for fanless
+cooling.
+</p>
+
+
+<figure>
+<p><img src="body%20and%20covers/body,%201.png" class="img-responsive" alt="body,%201.png">
+</p>
+</figure>
+
+<p>
+Various modules are realized on top of prototype PCBs that slide into
+dedicated rails within the body.
+</p>
+
+
+<figure>
+<p><img src="body%20and%20covers/body,%202.png" class="img-responsive" alt="body,%202.png">
+</p>
+</figure>
+
+<p>
+Like this:
+</p>
+
+
+<figure>
+<p><img src="make,%202.png" class="img-responsive" alt="make,%202.png">
+</p>
+</figure>
+
+<p>
+When cover is closed, it blocks PCB movement:
+</p>
+
+
+<figure>
+<p><img src="body%20and%20covers/cover.png" class="img-responsive" alt="cover.png">
+</p>
+</figure>
+
+<p>
+There is still some empty space inside, so why not add dummy cover on
+top that can be replaced later with add-on functionality/expansion
+board/terminal :)
+</p>
+
+
+<figure>
+<p><img src="body%20and%20covers/cover%20cover.png" class="img-responsive" alt="cover%20cover.png">
+</p>
+</figure>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="body%20and%20covers/body.stl">Body STL file</a>
+</li>
+<li><a href="body%20and%20covers/cover.stl">Big cover STL file</a>
+</li>
+<li><a href="body%20and%20covers/cover%20cover.stl">Small dummy cover on top, STL file</a>
+</li>
+<li><a href="body%20and%20covers/body%20and%20covers.FCStd">Body and covers FreeCAD project</a>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-3" class="outline-2">
+<h2 id="sec-3"><span class="section-number-2">3</span> Transformer and AC to DC converter</h2>
+<div class="outline-text-2" id="text-3">
+<p>
+This is where high voltage from mains electricity enters the system.
+</p>
+
+<p>
+Schematic:
+<img src="transformer%20and%20AC%20DC%20converter%20board/schematic.png" class="img-responsive" alt="schematic.png">
+</p>
+
+<p>
+For safety I kept high voltage section as minimal as possible. That
+is, wall plug runs straight into transformer. Also I used <a href="https://www.amazon.de/gp/product/B07VGQKM3G/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1">UV hardening
+glue</a> for extra safety and isolation on PCB.
+</p>
+
+<p>
+Power on/off switch operates on already reduced voltage of about 30
+volts. Power switch is located on <a href="#sec-6">indicator panel</a>.
+</p>
+
+
+<figure>
+<p><img src="transformer%20and%20AC%20DC%20converter%20board/make,%201.png" class="img-responsive" alt="make,%201.png">
+</p>
+</figure>
+
+<p>
+DC current of about 30 volts is then routed to <a href="#sec-4">Main board</a>.
+</p>
+
+
+<figure>
+<p><img src="transformer%20and%20AC%20DC%20converter%20board/make,%202.png" class="img-responsive" alt="make,%202.png">
+</p>
+</figure>
+
+<p>
+<a href="https://www.amazon.de/gp/product/B07RLQH5TR/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1">Single sided prototype PCB is used</a>.
+</p>
+</div>
+</div>
+
+<div id="outline-container-sec-4" class="outline-2">
+<h2 id="sec-4"><a id="ID-65d68227-4bf2-4c4f-b4d3-c390bc6a9c34" name="ID-65d68227-4bf2-4c4f-b4d3-c390bc6a9c34"></a><span class="section-number-2">4</span> Main board</h2>
+<div class="outline-text-2" id="text-4">
+<p>
+This is logically main board because it appears to be central hub that
+connects all components. It also houses 2 <a href="https://www.amazon.de/gp/product/B072MQYJ93/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1">adjustable DC-DC Step Down
+voltage converters</a>.
+</p>
+
+
+<figure>
+<p><img src="main%20board/main%20board,%201.png" class="img-responsive" alt="main%20board,%201.png">
+</p>
+</figure>
+
+<p>
+High-level schematic of entire device:
+<img src="main%20board/schematic.png" class="img-responsive" alt="schematic.png">
+</p>
+
+<p>
+As seen from schematic, ~30 volts DC from transformer board is routed
+into first step-down converter that reduces it to about 15V. Reduced
+voltage is then directed to <a href="#sec-5">Current limiter circuit</a>. Current limiter
+loses about 2 volts. Now we have current and voltage limited power at
+about 13 volts. This power is used to charge connected 12V Lead-Acid
+battery. Also the same power is routed to <a href="#sec-7">connector terminal</a> to be
+consumed by connected devices.
+</p>
+
+<p>
+As seen from this schematic, device is not meant to provide high
+current for long periods of time. Instead it gets comparatively
+limited current to charge the battery and feed devices with low
+current requirements. Occasional current spikes are backed up by
+battery that stays in use-changing mode.
+</p>
+
+<p>
+Also about 13V output voltage is approximate and depends on connected
+battery charge level.
+</p>
+
+<p>
+Second Step-Down converter reduces voltage even further to quite
+precisely 5V DC. This resulting voltage is also routed to <a href="#sec-7">connector
+terminal</a>.
+</p>
+
+<p>
+Both 13V and 5V lines are also routed to <a href="#sec-6">indicator panel</a> for
+monitoring.
+</p>
+
+<p>
+There is single on/off switch. In off position, it disconnects battery
+and transformer from the system effectively powering everything down.
+</p>
+
+<p>
+On schematic above, some wires are annotated with numbers from 1
+to 13. This corresponds to output pins on the board.
+</p>
+
+
+<figure>
+<p><img src="main%20board/main%20board,%202.png" class="img-responsive" alt="main%20board,%202.png">
+</p>
+</figure>
+</div>
+</div>
+<div id="outline-container-sec-5" class="outline-2">
+<h2 id="sec-5"><a id="ID-afc22d23-9bc4-421c-9cac-e0ce34bd36bc" name="ID-afc22d23-9bc4-421c-9cac-e0ce34bd36bc"></a><span class="section-number-2">5</span> Current limiter</h2>
+<div class="outline-text-2" id="text-5">
+<p>
+Schematic:
+<img src="current%20limiter/schematic.png" class="img-responsive" alt="schematic.png">
+</p>
+
+<p>
+Simple LM317 based current limiter is used. I used 4.7 ohm
+resistor. It provides about 265 milliamps of current. See <a href="http://www.reuk.co.uk/wordpress/electric-circuit/lm317-current-calculator/">calculator</a>.
+</p>
+
+
+<figure>
+<p><img src="current%20limiter/current%20limiter,%201.png" class="img-responsive" alt="current%20limiter,%201.png">
+</p>
+</figure>
+
+<p>
+Thermal paste below and UV hardening glue on top is used to attach
+LM317 to the heatsink. There is also jumper-like solution on top
+right. This is handy to attach multimeter tap to verify/monitor
+current during initial device calibration.
+</p>
+
+<p>
+If attached battery is really empty, significant voltage drop can
+occur in LM317. Heatsink is needed to dissipate that power.
+</p>
+
+
+<figure>
+<p><img src="current%20limiter/current%20limiter,%202.png" class="img-responsive" alt="current%20limiter,%202.png">
+</p>
+</figure>
+
+<p>
+Note: resistor gets hot too.
+</p>
+</div>
+</div>
+
+<div id="outline-container-sec-6" class="outline-2">
+<h2 id="sec-6"><a id="ID-c9a69490-f920-4a31-b32e-b101bfc3d01b" name="ID-c9a69490-f920-4a31-b32e-b101bfc3d01b"></a><span class="section-number-2">6</span> Indicator panel</h2>
+<div class="outline-text-2" id="text-6">
+
+<figure>
+<p><img src="indicator%20panel/indicator%20panel,%201.png" class="img-responsive" alt="indicator%20panel,%201.png">
+</p>
+</figure>
+
+<p>
+Basically 2 digital DC voltmeters and main on/off switch.
+</p>
+
+
+<figure>
+<p><img src="indicator%20panel/indicator%20panel,%202.png" class="img-responsive" alt="indicator%20panel,%202.png">
+</p>
+</figure>
+
+<p>
+Download:
+</p>
+
+
+<figure>
+<p><img src="indicator%20panel/indicator%20panel.png" class="img-responsive" alt="indicator%20panel.png">
+</p>
+</figure>
+
+<ul class="org-ul">
+<li><a href="indicator%20panel/indicator%20panel.stl">STL file</a>
+</li>
+<li><a href="indicator%20panel/indicator%20panel.FCStd">FreeCAD project</a>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-7" class="outline-2">
+<h2 id="sec-7"><a id="ID-e33940bd-652f-4ec0-b53b-1c03e16941c8" name="ID-e33940bd-652f-4ec0-b53b-1c03e16941c8"></a><span class="section-number-2">7</span> Connector terminal</h2>
+<div class="outline-text-2" id="text-7">
+<p>
+Schematic:
+<img src="connector%20terminal/schematic.png" class="img-responsive" alt="schematic.png">
+</p>
+
+<p>
+As seen above, most of the USB connectors are used to deliver dual
+power output and 1-wire data connectivity, except one on the bottom
+right. This is used to attach 12V battery. Some capacitors are thrown
+in as well to stabilize against smaller current spikes.
+</p>
+
+<p>
+Electrically schematic is realized using smaller prototype PCBs.
+</p>
+
+
+<figure>
+<p><img src="connector%20terminal/make,%201.png" class="img-responsive" alt="make,%201.png">
+</p>
+</figure>
+
+
+<p>
+Those PCBs are wired to central small PCB that acts as a hub:
+</p>
+
+
+<figure>
+<p><img src="connector%20terminal/make,%202.png" class="img-responsive" alt="make,%202.png">
+</p>
+</figure>
+
+<p>
+PCBs are held together by being sandwiched between front panel:
+</p>
+
+
+<figure>
+<p><img src="connector%20terminal/front%20panel.png" class="img-responsive" alt="front%20panel.png">
+</p>
+</figure>
+
+<p>
+and smaller back-end plate:
+</p>
+
+
+<figure>
+<p><img src="connector%20terminal/back%20panel.png" class="img-responsive" alt="back%20panel.png">
+</p>
+</figure>
+
+<p>
+Result:
+</p>
+
+
+<figure>
+<p><img src="connector%20terminal/make,%203.png" class="img-responsive" alt="make,%203.png">
+</p>
+</figure>
+
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="connector%20terminal/front%20panel.stl">front panel STL</a>
+</li>
+<li><a href="connector%20terminal/back%20panel.stl">back panel STL</a>
+</li>
+<li><a href="connector%20terminal/connector%20terminal.FCStd">FreeCAD project</a>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-8" class="outline-2">
+<h2 id="sec-8"><span class="section-number-2">8</span> Calibration</h2>
+<div class="outline-text-2" id="text-8">
+<p>
+Since device uses adjustable step-down modules, these need to be
+calibrated to provide correct output voltage. It is important that
+battery receives proper charging voltage otherwise either no charging
+occurs or battery starts gassing out and gets destroyed.
+</p>
+
+<p>
+See here for more details: <a href="https://www.powerstream.com/SLA.htm">https://www.powerstream.com/SLA.htm</a>
+</p>
+
+<hr >
+
+<p>
+Happy building! :)
+</p>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+<li><a href="#sec-3">3. Transformer and AC to DC converter</a></li>
+<li><a href="#sec-4">4. Main board</a></li>
+<li><a href="#sec-5">5. Current limiter</a></li>
+<li><a href="#sec-6">6. Indicator panel</a></li>
+<li><a href="#sec-7">7. Connector terminal</a></li>
+<li><a href="#sec-8">8. Calibration</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-07-12 Sun 02:52</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Battery charger and dual power supply unit
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Authors:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
+ - Valeria Agejenko
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+I needed dual voltage power supply for my lab that runs on mains
+electricity (wall power) and slowly charges attached 12V Lead-Acid
+battery. Lead-acid battery in turn provides high current when needed
+as well as power in portable situations or when mains electricity is
+not available.
+
+[[file:make.png]]
+
+Power supply provides about 13 Volts and 5 Volts simultaneously.
+
+!!!WARNING!!! I use USB-A connectors for power output, but IT IS NOT
+COMPATIBLE WITH USB DEVICES AND POSSIBLY WITH EXISTING USB CABLES.
+
+Normal USB devices and cables should not be plugged in! It would
+damage device/cable and likely power supply.
+
+I found USB-A connectors to be easily available, cheap, reliable and
+functional, so I re-purposed connector for my own needs but I'm using
+totally incompatible electrical wiring.
+
+[[file:connector%20terminal/USB%20hack.png]]
+
+As seen, it has dual voltage output. Additionally one wire is
+dedicated to data transmission and can be used with [[https://en.wikipedia.org/wiki/1-Wire][1-wire]]
+protocol. Power supply simply passively links all data wires together
+but does not participate in communication.
+
+Power supply uses 3D printed body with lots of holes, for fanless
+cooling.
+
+[[file:body%20and%20covers/body,%201.png]]
+
+Various modules are realized on top of prototype PCBs that slide into
+dedicated rails within the body.
+
+[[file:body%20and%20covers/body,%202.png]]
+
+Like this:
+
+[[file:make,%202.png]]
+
+When cover is closed, it blocks PCB movement:
+
+[[file:body%20and%20covers/cover.png]]
+
+There is still some empty space inside, so why not add dummy cover on
+top that can be replaced later with add-on functionality/expansion
+board/terminal :)
+
+[[file:body%20and%20covers/cover%20cover.png]]
+
+Download:
++ [[file:body%20and%20covers/body.stl][Body STL file]]
++ [[file:body%20and%20covers/cover.stl][Big cover STL file]]
++ [[file:body%20and%20covers/cover%20cover.stl][Small dummy cover on top, STL file]]
++ [[file:body%20and%20covers/body%20and%20covers.FCStd][Body and covers FreeCAD project]]
+
+* Transformer and AC to DC converter
+
+This is where high voltage from mains electricity enters the system.
+
+Schematic:
+[[file:transformer%20and%20AC%20DC%20converter%20board/schematic.png]]
+
+For safety I kept high voltage section as minimal as possible. That
+is, wall plug runs straight into transformer. Also I used [[https://www.amazon.de/gp/product/B07VGQKM3G/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1][UV hardening
+glue]] for extra safety and isolation on PCB.
+
+Power on/off switch operates on already reduced voltage of about 30
+volts. Power switch is located on [[id:c9a69490-f920-4a31-b32e-b101bfc3d01b][indicator panel]].
+
+[[file:transformer%20and%20AC%20DC%20converter%20board/make,%201.png]]
+
+DC current of about 30 volts is then routed to [[id:65d68227-4bf2-4c4f-b4d3-c390bc6a9c34][Main board]].
+
+[[file:transformer%20and%20AC%20DC%20converter%20board/make,%202.png]]
+
+[[https://www.amazon.de/gp/product/B07RLQH5TR/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1][Single sided prototype PCB is used]].
+
+* Main board
+:PROPERTIES:
+:ID: 65d68227-4bf2-4c4f-b4d3-c390bc6a9c34
+:END:
+
+This is logically main board because it appears to be central hub that
+connects all components. It also houses 2 [[https://www.amazon.de/gp/product/B072MQYJ93/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1][adjustable DC-DC Step Down
+voltage converters]].
+
+[[file:main%20board/main%20board,%201.png]]
+
+High-level schematic of entire device:
+[[file:main%20board/schematic.png]]
+
+As seen from schematic, ~30 volts DC from transformer board is routed
+into first step-down converter that reduces it to about 15V. Reduced
+voltage is then directed to [[id:afc22d23-9bc4-421c-9cac-e0ce34bd36bc][Current limiter circuit]]. Current limiter
+loses about 2 volts. Now we have current and voltage limited power at
+about 13 volts. This power is used to charge connected 12V Lead-Acid
+battery. Also the same power is routed to [[id:e33940bd-652f-4ec0-b53b-1c03e16941c8][connector terminal]] to be
+consumed by connected devices.
+
+As seen from this schematic, device is not meant to provide high
+current for long periods of time. Instead it gets comparatively
+limited current to charge the battery and feed devices with low
+current requirements. Occasional current spikes are backed up by
+battery that stays in use-changing mode.
+
+Also about 13V output voltage is approximate and depends on connected
+battery charge level.
+
+Second Step-Down converter reduces voltage even further to quite
+precisely 5V DC. This resulting voltage is also routed to [[id:e33940bd-652f-4ec0-b53b-1c03e16941c8][connector
+terminal]].
+
+Both 13V and 5V lines are also routed to [[id:c9a69490-f920-4a31-b32e-b101bfc3d01b][indicator panel]] for
+monitoring.
+
+There is single on/off switch. In off position, it disconnects battery
+and transformer from the system effectively powering everything down.
+
+On schematic above, some wires are annotated with numbers from 1
+to 13. This corresponds to output pins on the board.
+
+[[file:main%20board/main%20board,%202.png]]
+* Current limiter
+:PROPERTIES:
+:ID: afc22d23-9bc4-421c-9cac-e0ce34bd36bc
+:END:
+
+Schematic:
+[[file:current%20limiter/schematic.png]]
+
+Simple LM317 based current limiter is used. I used 4.7 ohm
+resistor. It provides about 265 milliamps of current. See [[http://www.reuk.co.uk/wordpress/electric-circuit/lm317-current-calculator/][calculator]].
+
+[[file:current%20limiter/current%20limiter,%201.png]]
+
+Thermal paste below and UV hardening glue on top is used to attach
+LM317 to the heatsink. There is also jumper-like solution on top
+right. This is handy to attach multimeter tap to verify/monitor
+current during initial device calibration.
+
+If attached battery is really empty, significant voltage drop can
+occur in LM317. Heatsink is needed to dissipate that power.
+
+[[file:current%20limiter/current%20limiter,%202.png]]
+
+Note: resistor gets hot too.
+
+* Indicator panel
+:PROPERTIES:
+:ID: c9a69490-f920-4a31-b32e-b101bfc3d01b
+:END:
+
+[[file:indicator%20panel/indicator%20panel,%201.png]]
+
+Basically 2 digital DC voltmeters and main on/off switch.
+
+[[file:indicator%20panel/indicator%20panel,%202.png]]
+
+Download:
+
+[[file:indicator%20panel/indicator%20panel.png]]
+
++ [[file:indicator%20panel/indicator%20panel.stl][STL file]]
++ [[file:indicator%20panel/indicator%20panel.FCStd][FreeCAD project]]
+
+* Connector terminal
+:PROPERTIES:
+:ID: e33940bd-652f-4ec0-b53b-1c03e16941c8
+:END:
+
+Schematic:
+[[file:connector%20terminal/schematic.png]]
+
+As seen above, most of the USB connectors are used to deliver dual
+power output and 1-wire data connectivity, except one on the bottom
+right. This is used to attach 12V battery. Some capacitors are thrown
+in as well to stabilize against smaller current spikes.
+
+Electrically schematic is realized using smaller prototype PCBs.
+
+[[file:connector%20terminal/make,%201.png]]
+
+
+Those PCBs are wired to central small PCB that acts as a hub:
+
+[[file:connector%20terminal/make,%202.png]]
+
+PCBs are held together by being sandwiched between front panel:
+
+[[file:connector%20terminal/front%20panel.png]]
+
+and smaller back-end plate:
+
+[[file:connector%20terminal/back%20panel.png]]
+
+Result:
+
+[[file:connector%20terminal/make,%203.png]]
+
+
+Download:
++ [[file:connector%20terminal/front%20panel.stl][front panel STL]]
++ [[file:connector%20terminal/back%20panel.stl][back panel STL]]
++ [[file:connector%20terminal/connector%20terminal.FCStd][FreeCAD project]]
+
+* Calibration
+
+Since device uses adjustable step-down modules, these need to be
+calibrated to provide correct output voltage. It is important that
+battery receives proper charging voltage otherwise either no charging
+occurs or battery starts gassing out and gets destroyed.
+
+See here for more details: https://www.powerstream.com/SLA.htm
+
+-----
+
+Happy building! :)
--- /dev/null
+
+
+Thermistor used: UEI005 (NTC Thermistor)
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>Headphone hub</title>
+<!-- 2020-12-25 Fri 23:48 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Headphone hub</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+<p>
+Simple hub that allows connecting up to 4 devices via headphone
+jack. For example single laptop or mp3 player can power up to 3
+headphones.
+</p>
+
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Schematic diagram:
+<img src="schematic.png" class="img-responsive" alt="schematic.png">
+</p>
+
+<p>
+Warning: All devices are connected in parallel. Make sure that audio
+producing device can handle combined load. See:
+<a href="https://en.wikipedia.org/wiki/Series_and_parallel_circuits#Resistance_units_2">https://en.wikipedia.org/wiki/Series_and_parallel_circuits#Resistance_units_2</a>
+</p>
+
+
+<figure>
+<p><img src="make,%202.png" class="img-responsive" alt="make,%202.png">
+</p>
+</figure>
+
+<p>
+Device consists of body and cover that are held together by single
+screw at the center:
+</p>
+
+
+<figure>
+<p><img src="cover,%202.png" class="img-responsive" alt="cover,%202.png">
+</p>
+</figure>
+</div>
+</div>
+
+<div id="outline-container-sec-3" class="outline-2">
+<h2 id="sec-3"><span class="section-number-2">3</span> Download</h2>
+<div class="outline-text-2" id="text-3">
+<ul class="org-ul">
+<li><a href="hub.FCStd">FreeCAD project</a>
+</li>
+</ul>
+
+
+<p>
+Body <a href="body.stl">STL file</a>
+<img src="body.png" class="img-responsive" alt="body.png">
+</p>
+
+
+
+<hr >
+<p>
+Cover <a href="cover.stl">STL file</a>
+</p>
+
+
+<figure>
+<p><img src="cover.png" class="img-responsive" alt="cover.png">
+</p>
+</figure>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+<li><a href="#sec-3">3. Download</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-12-25 Fri 23:48</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Headphone hub
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+Simple hub that allows connecting up to 4 devices via headphone
+jack. For example single laptop or mp3 player can power up to 3
+headphones.
+
+[[file:make.png]]
+
+Schematic diagram:
+[[file:schematic.png]]
+
+Warning: All devices are connected in parallel. Make sure that audio
+producing device can handle combined load. See:
+https://en.wikipedia.org/wiki/Series_and_parallel_circuits#Resistance_units_2
+
+[[file:make,%202.png]]
+
+Device consists of body and cover that are held together by single
+screw at the center:
+
+[[file:cover,%202.png]]
+
+* Download
+
+- [[file:hub.FCStd][FreeCAD project]]
+
+
+Body [[file:body.stl][STL file]]
+[[file:body.png]]
+
+
+
+-----
+Cover [[file:cover.stl][STL file]]
+
+[[file:cover.png]]
--- /dev/null
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
+#
+# Connector_AudioJack3
+#
+DEF Connector_AudioJack3 J 0 20 Y Y 1 F N
+F0 "J" 0 350 50 H V C CNN
+F1 "Connector_AudioJack3" 0 250 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Jack*
+$ENDFPLIST
+DRAW
+S -200 -200 -250 -100 0 1 10 F
+S 100 150 -200 -200 0 1 10 f
+P 4 0 1 10 0 -100 25 -125 50 -100 100 -100 N
+P 5 0 1 10 -75 -100 -50 -125 -25 -100 -25 0 100 0 N
+P 5 0 1 10 100 100 -100 100 -100 -100 -125 -125 -150 -100 N
+X ~ R 200 0 100 L 50 50 1 1 P
+X ~ S 200 100 100 L 50 50 1 1 P
+X ~ T 200 -100 100 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+#End Library
--- /dev/null
+EESchema Schematic File Version 4
+EELAYER 30 0
+EELAYER END
+$Descr A4 11693 8268
+encoding utf-8
+Sheet 1 1
+Title ""
+Date ""
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+$Comp
+L Connector:AudioJack3 J1
+U 1 1 5FE65EA5
+P 3100 3300
+F 0 "J1" V 3036 3488 50 0000 L CNN
+F 1 "AudioJack3" V 3127 3488 50 0000 L CNN
+F 2 "" H 3100 3300 50 0001 C CNN
+F 3 "~" H 3100 3300 50 0001 C CNN
+ 1 3100 3300
+ 0 1 1 0
+$EndComp
+$Comp
+L Connector:AudioJack3 J2
+U 1 1 5FE6658D
+P 4000 3300
+F 0 "J2" V 3936 3488 50 0000 L CNN
+F 1 "AudioJack3" V 4027 3488 50 0000 L CNN
+F 2 "" H 4000 3300 50 0001 C CNN
+F 3 "~" H 4000 3300 50 0001 C CNN
+ 1 4000 3300
+ 0 1 1 0
+$EndComp
+$Comp
+L Connector:AudioJack3 J3
+U 1 1 5FE66E55
+P 4850 3300
+F 0 "J3" V 4786 3488 50 0000 L CNN
+F 1 "AudioJack3" V 4877 3488 50 0000 L CNN
+F 2 "" H 4850 3300 50 0001 C CNN
+F 3 "~" H 4850 3300 50 0001 C CNN
+ 1 4850 3300
+ 0 1 1 0
+$EndComp
+Wire Wire Line
+ 3000 3500 3000 3800
+Wire Wire Line
+ 3000 3800 3900 3800
+Wire Wire Line
+ 3900 3800 3900 3500
+Wire Wire Line
+ 3900 3800 4750 3800
+Wire Wire Line
+ 4750 3800 4750 3500
+Connection ~ 3900 3800
+Wire Wire Line
+ 3100 3500 3100 3750
+Wire Wire Line
+ 3100 3750 4000 3750
+Wire Wire Line
+ 4000 3750 4000 3500
+Wire Wire Line
+ 4000 3750 4850 3750
+Wire Wire Line
+ 4850 3750 4850 3500
+Connection ~ 4000 3750
+Wire Wire Line
+ 3200 3500 3200 3700
+Wire Wire Line
+ 3200 3700 4100 3700
+Wire Wire Line
+ 4100 3700 4100 3500
+Wire Wire Line
+ 4100 3700 4950 3700
+Wire Wire Line
+ 4950 3700 4950 3500
+Connection ~ 4100 3700
+$Comp
+L Connector:AudioJack3 J4
+U 1 1 5FE687FA
+P 5700 3300
+F 0 "J4" V 5636 3488 50 0000 L CNN
+F 1 "AudioJack3" V 5727 3488 50 0000 L CNN
+F 2 "" H 5700 3300 50 0001 C CNN
+F 3 "~" H 5700 3300 50 0001 C CNN
+ 1 5700 3300
+ 0 1 1 0
+$EndComp
+Wire Wire Line
+ 4750 3800 5600 3800
+Wire Wire Line
+ 5600 3800 5600 3500
+Wire Wire Line
+ 4850 3750 5700 3750
+Wire Wire Line
+ 5700 3750 5700 3500
+Wire Wire Line
+ 4950 3700 5800 3700
+Wire Wire Line
+ 5800 3700 5800 3500
+Connection ~ 4750 3800
+Connection ~ 4850 3750
+Connection ~ 4950 3700
+$EndSCHEMATC
+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>Meiqqm portable dosimeter case</title>
-<!-- 2020-06-01 E 07:00 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-<style type="text/css">
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- min-height: 100%;
-}
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-body {
- font-size: 18px;
- margin-bottom: 105px;
-}
-
-footer {
- position: absolute;
- bottom: 0;
- width: 100%;
- height: 101px;
- background-color: #f5f5f5;
-}
-
-footer > div {
- padding: 10px;
-}
-
-footer p {
- margin: 0 0 5px;
- text-align: center;
- font-size: 16px;
-}
-
-#table-of-contents {
- margin-top: 20px;
- margin-bottom: 20px;
-}
-
-blockquote p {
- font-size: 18px;
-}
-
-pre {
- font-size: 16px;
-}
-
-.footpara {
- display: inline-block;
-}
-
-figcaption {
- font-size: 16px;
- color: #666;
- font-style: italic;
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-/* from twbs docs */
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-.bs-docs-sidebar.affix {
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- }
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-
-/* All levels of nav */
-.bs-docs-sidebar .nav > li > a {
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-
-/* Show and affix the side nav when space allows it */
-@media (min-width: 992px) {
- .bs-docs-sidebar .nav > .active > ul {
- display: block;
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- /* Widen the fixed sidebar */
- .bs-docs-sidebar.affix,
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-</style>
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-$(function() {
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-
- $('.bs-docs-sidebar').affix();
-});
-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Meiqqm portable dosimeter case</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-This Geiger–Müller counter based nuclear radiation detector can be
-bought <a href="https://www.amazon.de/gp/product/B07S171CD1/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1">here</a>.
-</p>
-
-<p>
-To better protect its display (for portable use), simple case have
-been made:
-</p>
-
-
-<figure>
-<p><img src="Meiqqm%20portable%20dosimeter%20case.png" class="img-responsive" alt="Meiqqm%20portable%20dosimeter%20case.png">
-</p>
-</figure>
-
-<p>
-Case has internally small bumps on the sides. It is suggested to
-insert device with the front panel towards the bump. Bumps are to
-ensure that screen and buttons are not scratched by the case.
-</p>
-
-<p>
-Download:
-</p>
-
-<ul class="org-ul">
-<li><a href="Meiqqm%20portable%20dosimeter%20case.stl">STL file</a>
-</li>
-<li><a href="Meiqqm%20portable%20dosimeter%20case.FCStd">FreeCAD project</a>
-</li>
-</ul>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-06-01 E 07:00</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Meiqqm portable dosimeter case
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-
-[[file:make.png]]
-
-This Geiger–Müller counter based nuclear radiation detector can be
-bought [[https://www.amazon.de/gp/product/B07S171CD1/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1][here]].
-
-To better protect its display (for portable use), simple case have
-been made:
-
-[[file:Meiqqm%20portable%20dosimeter%20case.png]]
-
-Case has internally small bumps on the sides. It is suggested to
-insert device with the front panel towards the bump. Bumps are to
-ensure that screen and buttons are not scratched by the case.
-
-Download:
-
-- [[file:Meiqqm%20portable%20dosimeter%20case.stl][STL file]]
-- [[file:Meiqqm%20portable%20dosimeter%20case.FCStd][FreeCAD project]]
+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>Nokia 105 (2019) modification for seniors</title>
-<!-- 2020-03-21 Sat 00:36 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-<style type="text/css">
-footer {background-color: #111 !important;}
-pre {background-color: #111; color: #ccc;}
-</style>
-<style type="text/css">
-/* org mode styles on top of twbs */
-
-html {
- position: relative;
- min-height: 100%;
-}
-
-body {
- font-size: 18px;
- margin-bottom: 105px;
-}
-
-footer {
- position: absolute;
- bottom: 0;
- width: 100%;
- height: 101px;
- background-color: #f5f5f5;
-}
-
-footer > div {
- padding: 10px;
-}
-
-footer p {
- margin: 0 0 5px;
- text-align: center;
- font-size: 16px;
-}
-
-#table-of-contents {
- margin-top: 20px;
- margin-bottom: 20px;
-}
-
-blockquote p {
- font-size: 18px;
-}
-
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- font-size: 16px;
-}
-
-.footpara {
- display: inline-block;
-}
-
-figcaption {
- font-size: 16px;
- color: #666;
- font-style: italic;
- padding-bottom: 15px;
-}
-
-/* from twbs docs */
-
-.bs-docs-sidebar.affix {
- position: static;
-}
-@media (min-width: 768px) {
- .bs-docs-sidebar {
- padding-left: 20px;
- }
-}
-
-/* All levels of nav */
-.bs-docs-sidebar .nav > li > a {
- display: block;
- padding: 4px 20px;
- font-size: 14px;
- font-weight: 500;
- color: #999;
-}
-.bs-docs-sidebar .nav > li > a:hover,
-.bs-docs-sidebar .nav > li > a:focus {
- padding-left: 19px;
- color: #A1283B;
- text-decoration: none;
- background-color: transparent;
- border-left: 1px solid #A1283B;
-}
-.bs-docs-sidebar .nav > .active > a,
-.bs-docs-sidebar .nav > .active:hover > a,
-.bs-docs-sidebar .nav > .active:focus > a {
- padding-left: 18px;
- font-weight: bold;
- color: #A1283B;
- background-color: transparent;
- border-left: 2px solid #A1283B;
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-
-/* Nav: second level (shown on .active) */
-.bs-docs-sidebar .nav .nav {
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-.bs-docs-sidebar .nav .nav > li > a:hover,
-.bs-docs-sidebar .nav .nav > li > a:focus {
- padding-left: 29px;
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-.bs-docs-sidebar .nav .nav > .active > a,
-.bs-docs-sidebar .nav .nav > .active:hover > a,
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- padding-left: 28px;
- font-weight: 500;
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- padding-bottom: 10px;
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-.bs-docs-sidebar .nav .nav .nav > li > a {
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-.bs-docs-sidebar .nav .nav .nav > li > a:hover,
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- padding-left: 39px;
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-.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
-.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
- padding-left: 38px;
- font-weight: 500;
-}
-
-/* Show and affix the side nav when space allows it */
-@media (min-width: 992px) {
- .bs-docs-sidebar .nav > .active > ul {
- display: block;
- }
- /* Widen the fixed sidebar */
- .bs-docs-sidebar.affix,
- .bs-docs-sidebar.affix-bottom {
- width: 213px;
- }
- .bs-docs-sidebar.affix {
- position: fixed; /* Undo the static from mobile first approach */
- top: 20px;
- }
- .bs-docs-sidebar.affix-bottom {
- position: absolute; /* Undo the static from mobile first approach */
- }
- .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
- margin-top: 0;
- margin-bottom: 0
- }
-}
-@media (min-width: 1200px) {
- /* Widen the fixed sidebar again */
- .bs-docs-sidebar.affix-bottom,
- .bs-docs-sidebar.affix {
- width: 263px;
- }
-}
-</style>
-<script type="text/javascript">
-$(function() {
- 'use strict';
-
- $('.bs-docs-sidebar li').first().addClass('active');
-
- $(document.body).scrollspy({target: '.bs-docs-sidebar'});
-
- $('.bs-docs-sidebar').affix();
-});
-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Nokia 105 (2019) modification for seniors</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Very old people often have problems with mental abilities, touch and
-vision. When the phone rings it is real issue to figure out what
-button to press and hit the right one to pick up the call. It is easy
-to end up in random phone menus instead that are incomprehensible for
-the elderly.
-</p>
-
-<p>
-Here is solution for the problem in the form of 3D printed case and
-extra add-on button that is glued to the original dial/receive key of
-the phone. All other buttons are rendered inaccessible on purpose.
-</p>
-
-<p>
-For extra clarity, this one important button:
-</p>
-<ul class="org-ul">
-<li>Is painted red.
-</li>
-<li>Has exaggerated surface and relief raising above main case surface.
-</li>
-<li>Has big white circle around it (I used <a href="https://en.wikipedia.org/wiki/Airbrush">airbrush</a> with stencil to
-paint the circle).
-</li>
-</ul>
-</div>
-
-<div id="outline-container-sec-2-1" class="outline-3">
-<h3 id="sec-2-1"><span class="section-number-3">2.1</span> Original Nokia 105 (2019)</h3>
-<div class="outline-text-3" id="text-2-1">
-
-<figure>
-<p><img src="1.png" class="img-responsive" alt="1.png">
-</p>
-</figure>
-
-<p>
-Nokia 105 (2019) allows receiving calls and dialing back the most
-recent call using single dial button (cannot hang up) though. Receiver
-of the call on the other end has to hang up. Prepaid SIM card is used,
-to avoid accidental/unintended charges for whatever reason.
-</p>
-</div>
-</div>
-
-<div id="outline-container-sec-2-2" class="outline-3">
-<h3 id="sec-2-2"><span class="section-number-3">2.2</span> Enlarged dial button</h3>
-<div class="outline-text-3" id="text-2-2">
-
-<figure>
-<p><img src="2.png" class="img-responsive" alt="2.png">
-</p>
-</figure>
-
-<p>
-Download button:
-<img src="button.png" class="img-responsive" alt="button.png">
-</p>
-
-<ul class="org-ul">
-<li><a href="button.FCStd">FreeCAD file</a>
-</li>
-<li><a href="button.stl">STL file</a>
-</li>
-</ul>
-
-
-<p>
-I glued button to the dial key of the phone.
-</p>
-
-
-<figure>
-<p><img src="3.png" class="img-responsive" alt="3.png">
-</p>
-</figure>
-</div>
-</div>
-
-
-
-<div id="outline-container-sec-2-3" class="outline-3">
-<h3 id="sec-2-3"><span class="section-number-3">2.3</span> Body and cover</h3>
-<div class="outline-text-3" id="text-2-3">
-
-<figure>
-<p><img src="body.png" class="img-responsive" alt="body.png">
-</p>
-</figure>
-
-<ul class="org-ul">
-<li>Cover inside:
-<ul class="org-ul">
-<li><img src="cover,%20inside.png" class="img-responsive" alt="cover,%20inside.png">
-</li>
-</ul>
-</li>
-
-<li>Cover outside:
-<ul class="org-ul">
-<li><img src="cover,%20outside.png" class="img-responsive" alt="cover,%20outside.png">
-</li>
-</ul>
-</li>
-
-<li>Download:
-<ul class="org-ul">
-<li><a href="body%20and%20cover.FCStd">body and cover FreeCAD file</a>
-</li>
-<li><a href="body.stl">body in STL format</a>
-</li>
-<li><a href="cover.stl">cover in STL format</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-
-<div id="outline-container-sec-2-4" class="outline-3">
-<h3 id="sec-2-4"><span class="section-number-3">2.4</span> Result</h3>
-<div class="outline-text-3" id="text-2-4">
-<p>
-End result looks like this:
-</p>
-
-
-<figure>
-<p><img src="4.png" class="img-responsive" alt="4.png">
-</p>
-</figure>
-
-<p>
-Connectors for headphones and charging are exposed though the hole in
-the body.
-</p>
-
-
-<figure>
-<p><img src="5.png" class="img-responsive" alt="5.png">
-</p>
-</figure>
-</div>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a>
-<ul class="nav">
-<li><a href="#sec-2-1">2.1. Original Nokia 105 (2019)</a></li>
-<li><a href="#sec-2-2">2.2. Enlarged dial button</a></li>
-<li><a href="#sec-2-3">2.3. Body and cover</a></li>
-<li><a href="#sec-2-4">2.4. Result</a></li>
-</ul>
-</li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-03-21 Sat 00:36</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Nokia 105 (2019) modification for seniors
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-[[file:make.png]]
-
-Very old people often have problems with mental abilities, touch and
-vision. When the phone rings it is real issue to figure out what
-button to press and hit the right one to pick up the call. It is easy
-to end up in random phone menus instead that are incomprehensible for
-the elderly.
-
-Here is solution for the problem in the form of 3D printed case and
-extra add-on button that is glued to the original dial/receive key of
-the phone. All other buttons are rendered inaccessible on purpose.
-
-For extra clarity, this one important button:
-+ Is painted red.
-+ Has exaggerated surface and relief raising above main case surface.
-+ Has big white circle around it (I used [[https://en.wikipedia.org/wiki/Airbrush][airbrush]] with stencil to
- paint the circle).
-
-** Original Nokia 105 (2019)
-[[file:1.png]]
-
-Nokia 105 (2019) allows receiving calls and dialing back the most
-recent call using single dial button (cannot hang up) though. Receiver
-of the call on the other end has to hang up. Prepaid SIM card is used,
-to avoid accidental/unintended charges for whatever reason.
-
-** Enlarged dial button
-
-[[file:2.png]]
-
-Download button:
-[[file:button.png]]
-
-+ [[file:button.FCStd][FreeCAD file]]
-+ [[file:button.stl][STL file]]
-
-
-I glued button to the dial key of the phone.
-
-[[file:3.png]]
-
-
-
-** Body and cover
-
-[[file:body.png]]
-
-+ Cover inside:
- + [[file:cover,%20inside.png]]
-
-+ Cover outside:
- + [[file:cover,%20outside.png]]
-
-+ Download:
- + [[file:body%20and%20cover.FCStd][body and cover FreeCAD file]]
- + [[file:body.stl][body in STL format]]
- + [[file:cover.stl][cover in STL format]]
-
-
-** Result
-End result looks like this:
-
-[[file:4.png]]
-
-Connectors for headphones and charging are exposed though the hole in
-the body.
-
-[[file:5.png]]
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>Portable stereo speaker</title>
+<!-- 2020-04-12 P 23:58 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
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+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Portable stereo speaker</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+<p>
+I had pair of good compact stereo speakers lying uselessly around as
+well as secondhand TDA2030 Chinese knockoff audio amplifier chips.
+Also I wanted to test modular construction approach: motherboard with
+shared bus and functionality realized via pluggable modules. So I
+built stereo speaker:
+</p>
+
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Indicator on the front panel shows available power within the
+system. Ideally it should be at the maximum. It drops when batteries
+run empty or when consumed power (too loud music) is greater than
+onboard power supply or batteries can handle. It has on/off switch and
+stereo audio input. Audio input impedance is about 100 ohms.
+</p>
+
+
+<figure>
+<p><img src="make,%20side.png" class="img-responsive" alt="make,%20side.png">
+</p>
+</figure>
+
+<p>
+Idea for the holes on the top and smaller ones on the bottom back is
+to enable air flow for passive cooling.
+</p>
+
+
+<figure>
+<p><img src="make,%20back.png" class="img-responsive" alt="make,%20back.png">
+</p>
+</figure>
+
+<p>
+Entire construction is made of parts, no larger than
+120x120x120mm. Maximum for my printer.
+</p>
+</div>
+</div>
+
+<div id="outline-container-sec-3" class="outline-2">
+<h2 id="sec-3"><span class="section-number-2">3</span> Battery holder</h2>
+<div class="outline-text-2" id="text-3">
+<p>
+Device is powered by 4 times AA NiMH batteries (1.2V each).
+</p>
+
+
+<figure>
+<p><img src="battery%20holder/schematic.png" class="img-responsive" alt="schematic.png">
+</p>
+</figure>
+
+<p>
+I happened to have AA battery adapters lying around with different
+bottom hole configurations. Therefore this weird hole design:
+</p>
+
+
+<figure>
+<p><img src="battery%20holder/battery%20holder.png" class="img-responsive" alt="battery%20holder.png">
+</p>
+</figure>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="battery%20holder/battery%20holder.FCStd">FreeCAD file</a>
+</li>
+<li><a href="battery%20holder/battery%20holder.stl">STL file</a>
+</li>
+</ul>
+
+<p>
+Result:
+<img src="battery%20holder/make.png" class="img-responsive" alt="make.png">
+</p>
+
+<p>
+Attaches to the back of the body:
+<img src="battery%20holder/mounted%20on%20the%20back.png" class="img-responsive" alt="mounted%20on%20the%20back.png">
+</p>
+</div>
+</div>
+
+<div id="outline-container-sec-4" class="outline-2">
+<h2 id="sec-4"><span class="section-number-2">4</span> 20V up-step module</h2>
+<div class="outline-text-2" id="text-4">
+<p>
+Battery pack voltage is routed through main on/off switch on the front
+panel, and then it goes to the 20V up-step module.
+</p>
+
+
+<figure>
+<p><img src="20V%20upstep%20module/schematic.png" class="img-responsive" alt="schematic.png">
+</p>
+</figure>
+
+<p>
+It uses ready made upstep module, but adds extra voltage filtering via
+inductor and capacitors.
+</p>
+
+
+<figure>
+<p><img src="20V%20upstep%20module/make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+</div>
+</div>
+
+<div id="outline-container-sec-5" class="outline-2">
+<h2 id="sec-5"><span class="section-number-2">5</span> Main board</h2>
+<div class="outline-text-2" id="text-5">
+<p>
+Voltage upstep above sits on top of main board (motherboard). It has
+uniform central bus that spans all connectors.
+</p>
+
+
+<figure>
+<p><img src="main%20board/internal%20bus.png" class="img-responsive" alt="internal%20bus.png">
+</p>
+</figure>
+
+
+<figure>
+<p><img src="main%20board/bus%20on%20the%20bottom,%202.png" class="img-responsive" alt="bus%20on%20the%20bottom,%202.png">
+</p>
+</figure>
+
+<p>
+First row of the main board is special IO terminal (for connecting
+speakers, front panel, etc..)
+</p>
+
+
+<figure>
+<p><img src="main%20board/IO%20terminal.png" class="img-responsive" alt="IO%20terminal.png">
+</p>
+</figure>
+
+<p>
+Remaining rows are for connecting boards:
+</p>
+
+
+<figure>
+<p><img src="main%20board/1.png" class="img-responsive" alt="1.png">
+</p>
+</figure>
+
+<p>
+To provide structural support, main board is attached to frame:
+</p>
+
+
+<figure>
+<p><img src="main%20board/board%20fixator%20body.png" class="img-responsive" alt="board%20fixator%20body.png">
+</p>
+</figure>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="main%20board/board%20fixator%20body.FCStd">FreeCAD file</a>
+</li>
+<li><a href="main%20board/board%20fixator%20body.stl">STL file</a>
+</li>
+</ul>
+
+<p>
+And boards plugged into main board are fixed at the top, using clip:
+</p>
+
+
+<figure>
+<p><img src="main%20board/board%20fixator%20top%20clip.png" class="img-responsive" alt="board%20fixator%20top%20clip.png">
+</p>
+</figure>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="main%20board/board%20fixator%20top%20clip.FCStd">FreeCAD file</a>
+</li>
+<li><a href="main%20board/board%20fixator%20top%20clip.stl">STL file</a>
+</li>
+</ul>
+
+<p>
+Result:
+</p>
+
+
+<figure>
+<p><img src="main%20board/bus%20on%20the%20bottom,%201.png" class="img-responsive" alt="bus%20on%20the%20bottom,%201.png">
+</p>
+</figure>
+
+
+<figure>
+<p><img src="main%20board/board%20fixator.png" class="img-responsive" alt="board%20fixator.png">
+</p>
+</figure>
+</div>
+</div>
+
+<div id="outline-container-sec-6" class="outline-2">
+<h2 id="sec-6"><span class="section-number-2">6</span> Mono audio amplifier module</h2>
+<div class="outline-text-2" id="text-6">
+<p>
+Design uses scavenged secondhand Chinese TDA2030 audio amp
+clones. Each chip is mono audio amplifier. Therefore 2 almost
+identical audio amp modules had to be built, one for left speaker, one
+for right.
+</p>
+
+
+<figure>
+<p><img src="mono%20audio%20amp%20module/schematic.png" class="img-responsive" alt="schematic.png">
+</p>
+</figure>
+
+<p>
+I like to build on top of prototype PCBs. Gives results much faster
+for one-off projects. Before soldering, I solve component layout on
+paper:
+</p>
+
+
+<figure>
+<p><img src="mono%20audio%20amp%20module/PCB%20layout.png" class="img-responsive" alt="PCB%20layout.png">
+</p>
+</figure>
+
+<p>
+Result - front:
+</p>
+
+
+<figure>
+<p><img src="mono%20audio%20amp%20module/assembled%20front.png" class="img-responsive" alt="assembled%20front.png">
+</p>
+</figure>
+
+<p>
+Result - back:
+</p>
+
+
+<figure>
+<p><img src="mono%20audio%20amp%20module/assembled%20back.png" class="img-responsive" alt="assembled%20back.png">
+</p>
+</figure>
+
+<p>
+Here copper tape is used as improvised heatsink.
+</p>
+</div>
+</div>
+
+<div id="outline-container-sec-7" class="outline-2">
+<h2 id="sec-7"><span class="section-number-2">7</span> Speakers</h2>
+<div class="outline-text-2" id="text-7">
+<p>
+High frequency small speaker and medium frequency bigger speaker are
+combined.
+</p>
+
+
+<figure>
+<p><img src="speakers/schematic.png" class="img-responsive" alt="schematic.png">
+</p>
+</figure>
+
+<p>
+Capacitor acts as high-pass filter on top of tiny PCB:
+</p>
+
+
+<figure>
+<p><img src="speakers/PCB%20layout.png" class="img-responsive" alt="PCB%20layout.png">
+</p>
+</figure>
+
+<p>
+Speaker enclosure:
+</p>
+
+
+<figure>
+<p><img src="speakers/speaker%20enclosure.png" class="img-responsive" alt="speaker%20enclosure.png">
+</p>
+</figure>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="speakers/speaker%20enclosure.FCStd">FreeCAD file</a>
+</li>
+<li><a href="speakers/speaker%20enclosure.stl">STL file</a>
+</li>
+</ul>
+
+<p>
+Speaker enclosure cover:
+</p>
+
+
+<figure>
+<p><img src="speakers/speaker%20enclosure%20cover.png" class="img-responsive" alt="speaker%20enclosure%20cover.png">
+</p>
+</figure>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="speakers/speaker%20enclosure%20cover.FCStd">FreeCAD file</a>
+</li>
+<li><a href="speakers/speaker%20enclosure%20cover.stl">STL file</a>
+</li>
+</ul>
+
+<p>
+Result:
+</p>
+
+
+<figure>
+<p><img src="speakers/make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+</div>
+</div>
+
+<div id="outline-container-sec-8" class="outline-2">
+<h2 id="sec-8"><span class="section-number-2">8</span> Front panel</h2>
+<div class="outline-text-2" id="text-8">
+<p>
+Initial idea was really simple panel:
+</p>
+<ul class="org-ul">
+<li>on/off switch
+</li>
+<li>system power indicator
+</li>
+<li>stereo audio input
+</li>
+</ul>
+
+<p>
+But, since I'm using "agile" approach, during load-testing, it become
+clear that active fan based cooling would be nice (when playing loud
+music). I found tiny cooler fan that needs 5 volts to operate. Also I
+need to power backlight for power indicator. For both of these cases,
+I decided to add another voltage up-step module (target voltage output
+set to 6V). This time directly on the front panel.
+</p>
+
+
+<figure>
+<p><img src="front%20panel/schematic.png" class="img-responsive" alt="schematic.png">
+</p>
+</figure>
+
+<p>
+Front panel case:
+</p>
+
+
+<figure>
+<p><img src="front%20panel/front%20panel,%20front.png" class="img-responsive" alt="front%20panel,%20front.png">
+</p>
+</figure>
+
+
+<figure>
+<p><img src="front%20panel/front%20panel,%20back.png" class="img-responsive" alt="front%20panel,%20back.png">
+</p>
+</figure>
+
+<p>
+Electronics fits inside:
+</p>
+
+
+<figure>
+<p><img src="front%20panel/front%20panel,%20back,%20make.png" class="img-responsive" alt="front%20panel,%20back,%20make.png">
+</p>
+</figure>
+
+<p>
+Front view:
+</p>
+
+
+<figure>
+<p><img src="front%20panel/front%20panel,%20front,%20make.png" class="img-responsive" alt="front%20panel,%20front,%20make.png">
+</p>
+</figure>
+
+<p>
+And attaches to the remaining components:
+</p>
+
+
+<figure>
+<p><img src="front%20panel/attachment.png" class="img-responsive" alt="attachment.png">
+</p>
+</figure>
+</div>
+</div>
+
+
+<div id="outline-container-sec-9" class="outline-2">
+<h2 id="sec-9"><span class="section-number-2">9</span> Extra capacitors</h2>
+<div class="outline-text-2" id="text-9">
+<p>
+Another thing that become clear during load-testing: output
+power/volume can be further enhanced by adding high power capacitors
+to even out load on primary 20V up-step module.
+</p>
+
+
+<figure>
+<p><img src="extra%20capacitors/extra%20caps.png" class="img-responsive" alt="extra%20caps.png">
+</p>
+</figure>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="extra%20capacitors/extra%20caps.FCStd">FreeCAD project</a>
+</li>
+<li><a href="extra%20capacitors/extra%20caps.stl">STL file</a>
+</li>
+</ul>
+
+<p>
+Extra caps are mounted on top of the speaker and electrically attached
+to the main board.
+</p>
+
+
+<figure>
+<p><img src="extra%20capacitors/make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+</div>
+</div>
+
+<div id="outline-container-sec-10" class="outline-2">
+<h2 id="sec-10"><span class="section-number-2">10</span> Center box</h2>
+<div class="outline-text-2" id="text-10">
+<p>
+Last physical part, to attach it all together: central body.
+</p>
+
+<p>
+Front:
+<img src="center%20box/front.png" class="img-responsive" alt="front.png">
+</p>
+
+<p>
+Back:
+<img src="center%20box/back.png" class="img-responsive" alt="back.png">
+</p>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="center%20box/center%20box.FCStd">FreeCAD file</a>
+</li>
+<li><a href="center%20box/center%20box.stl">STL file</a>
+</li>
+</ul>
+</div>
+</div>
+
+
+<div id="outline-container-sec-11" class="outline-2">
+<h2 id="sec-11"><span class="section-number-2">11</span> Conclusions / TODO</h2>
+<div class="outline-text-2" id="text-11">
+<p>
+These things could be done better:
+</p>
+
+<ul class="org-ul">
+<li>Instead of using undersized heatsinks on the audio amplifiers and
+need for active cooling as a consequence, it would be better to try
+to mount audio amplifier chip on top of speaker metallic body. It
+would provide plenty of cooling and reduces power losses within
+cable, since amplifier would be as close to the speaker as possible.
+</li>
+
+<li>I used agile design. That is, implemented functionality ad-hoc. If I
+had done design in advance, then I could have had smarter connector
+layout between main board and front panel. That is: Instead of
+multiple smaller cables, one wide (multi connector) cable.
+</li>
+
+<li>Screw holes are too close to the edges on the front panel.
+</li>
+
+<li>It would be better if screw heads were slightly buried within
+construction body.
+</li>
+</ul>
+
+
+<p>
+Overall, it was good learning experience and I was able to test
+various ideas on it. Will add cooler later :)
+</p>
+
+
+<p>
+Photo of initial PSU + audio amp test:
+</p>
+
+
+<figure>
+<p><img src="initial%20test.png" class="img-responsive" alt="initial%20test.png">
+</p>
+</figure>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+<li><a href="#sec-3">3. Battery holder</a></li>
+<li><a href="#sec-4">4. 20V up-step module</a></li>
+<li><a href="#sec-5">5. Main board</a></li>
+<li><a href="#sec-6">6. Mono audio amplifier module</a></li>
+<li><a href="#sec-7">7. Speakers</a></li>
+<li><a href="#sec-8">8. Front panel</a></li>
+<li><a href="#sec-9">9. Extra capacitors</a></li>
+<li><a href="#sec-10">10. Center box</a></li>
+<li><a href="#sec-11">11. Conclusions / TODO</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-04-12 P 23:58</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Portable stereo speaker
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+I had pair of good compact stereo speakers lying uselessly around as
+well as secondhand TDA2030 Chinese knockoff audio amplifier chips.
+Also I wanted to test modular construction approach: motherboard with
+shared bus and functionality realized via pluggable modules. So I
+built stereo speaker:
+
+[[file:make.png]]
+
+Indicator on the front panel shows available power within the
+system. Ideally it should be at the maximum. It drops when batteries
+run empty or when consumed power (too loud music) is greater than
+onboard power supply or batteries can handle. It has on/off switch and
+stereo audio input. Audio input impedance is about 100 ohms.
+
+[[file:make,%20side.png]]
+
+Idea for the holes on the top and smaller ones on the bottom back is
+to enable air flow for passive cooling.
+
+[[file:make,%20back.png]]
+
+Entire construction is made of parts, no larger than
+120x120x120mm. Maximum for my printer.
+
+* Battery holder
+Device is powered by 4 times AA NiMH batteries (1.2V each).
+
+[[file:battery%20holder/schematic.png]]
+
+I happened to have AA battery adapters lying around with different
+bottom hole configurations. Therefore this weird hole design:
+
+[[file:battery%20holder/battery%20holder.png]]
+
+Download:
++ [[file:battery%20holder/battery%20holder.FCStd][FreeCAD file]]
++ [[file:battery%20holder/battery%20holder.stl][STL file]]
+
+Result:
+[[file:battery%20holder/make.png]]
+
+Attaches to the back of the body:
+[[file:battery%20holder/mounted%20on%20the%20back.png]]
+
+* 20V up-step module
+Battery pack voltage is routed through main on/off switch on the front
+panel, and then it goes to the 20V up-step module.
+
+[[file:20V%20upstep%20module/schematic.png]]
+
+It uses ready made upstep module, but adds extra voltage filtering via
+inductor and capacitors.
+
+[[file:20V%20upstep%20module/make.png]]
+
+* Main board
+
+Voltage upstep above sits on top of main board (motherboard). It has
+uniform central bus that spans all connectors.
+
+[[file:main%20board/internal%20bus.png]]
+
+[[file:main%20board/bus%20on%20the%20bottom,%202.png]]
+
+First row of the main board is special IO terminal (for connecting
+speakers, front panel, etc..)
+
+[[file:main%20board/IO%20terminal.png]]
+
+Remaining rows are for connecting boards:
+
+[[file:main%20board/1.png]]
+
+To provide structural support, main board is attached to frame:
+
+[[file:main%20board/board%20fixator%20body.png]]
+
+Download:
++ [[file:main%20board/board%20fixator%20body.FCStd][FreeCAD file]]
++ [[file:main%20board/board%20fixator%20body.stl][STL file]]
+
+And boards plugged into main board are fixed at the top, using clip:
+
+[[file:main%20board/board%20fixator%20top%20clip.png]]
+
+Download:
++ [[file:main%20board/board%20fixator%20top%20clip.FCStd][FreeCAD file]]
++ [[file:main%20board/board%20fixator%20top%20clip.stl][STL file]]
+
+Result:
+
+[[file:main%20board/bus%20on%20the%20bottom,%201.png]]
+
+[[file:main%20board/board%20fixator.png]]
+
+* Mono audio amplifier module
+
+Design uses scavenged secondhand Chinese TDA2030 audio amp
+clones. Each chip is mono audio amplifier. Therefore 2 almost
+identical audio amp modules had to be built, one for left speaker, one
+for right.
+
+[[file:mono%20audio%20amp%20module/schematic.png]]
+
+I like to build on top of prototype PCBs. Gives results much faster
+for one-off projects. Before soldering, I solve component layout on
+paper:
+
+[[file:mono%20audio%20amp%20module/PCB%20layout.png]]
+
+Result - front:
+
+[[file:mono%20audio%20amp%20module/assembled%20front.png]]
+
+Result - back:
+
+[[file:mono%20audio%20amp%20module/assembled%20back.png]]
+
+Here copper tape is used as improvised heatsink.
+
+* Speakers
+
+High frequency small speaker and medium frequency bigger speaker are
+combined.
+
+[[file:speakers/schematic.png]]
+
+Capacitor acts as high-pass filter on top of tiny PCB:
+
+[[file:speakers/PCB%20layout.png]]
+
+Speaker enclosure:
+
+[[file:speakers/speaker%20enclosure.png]]
+
+Download:
++ [[file:speakers/speaker%20enclosure.FCStd][FreeCAD file]]
++ [[file:speakers/speaker%20enclosure.stl][STL file]]
+
+Speaker enclosure cover:
+
+[[file:speakers/speaker%20enclosure%20cover.png]]
+
+Download:
++ [[file:speakers/speaker%20enclosure%20cover.FCStd][FreeCAD file]]
++ [[file:speakers/speaker%20enclosure%20cover.stl][STL file]]
+
+Result:
+
+[[file:speakers/make.png]]
+
+* Front panel
+
+Initial idea was really simple panel:
++ on/off switch
++ system power indicator
++ stereo audio input
+
+But, since I'm using "agile" approach, during load-testing, it become
+clear that active fan based cooling would be nice (when playing loud
+music). I found tiny cooler fan that needs 5 volts to operate. Also I
+need to power backlight for power indicator. For both of these cases,
+I decided to add another voltage up-step module (target voltage output
+set to 6V). This time directly on the front panel.
+
+[[file:front%20panel/schematic.png]]
+
+Front panel case:
+
+[[file:front%20panel/front%20panel,%20front.png]]
+
+[[file:front%20panel/front%20panel,%20back.png]]
+
+Electronics fits inside:
+
+[[file:front%20panel/front%20panel,%20back,%20make.png]]
+
+Front view:
+
+[[file:front%20panel/front%20panel,%20front,%20make.png]]
+
+And attaches to the remaining components:
+
+[[file:front%20panel/attachment.png]]
+
+
+* Extra capacitors
+Another thing that become clear during load-testing: output
+power/volume can be further enhanced by adding high power capacitors
+to even out load on primary 20V up-step module.
+
+[[file:extra%20capacitors/extra%20caps.png]]
+
+Download:
++ [[file:extra%20capacitors/extra%20caps.FCStd][FreeCAD project]]
++ [[file:extra%20capacitors/extra%20caps.stl][STL file]]
+
+Extra caps are mounted on top of the speaker and electrically attached
+to the main board.
+
+[[file:extra%20capacitors/make.png]]
+
+* Center box
+
+Last physical part, to attach it all together: central body.
+
+Front:
+[[file:center%20box/front.png]]
+
+Back:
+[[file:center%20box/back.png]]
+
+Download:
++ [[file:center%20box/center%20box.FCStd][FreeCAD file]]
++ [[file:center%20box/center%20box.stl][STL file]]
+
+
+* Conclusions / TODO
+
+These things could be done better:
+
++ Instead of using undersized heatsinks on the audio amplifiers and
+ need for active cooling as a consequence, it would be better to try
+ to mount audio amplifier chip on top of speaker metallic body. It
+ would provide plenty of cooling and reduces power losses within
+ cable, since amplifier would be as close to the speaker as possible.
+
++ I used agile design. That is, implemented functionality ad-hoc. If I
+ had done design in advance, then I could have had smarter connector
+ layout between main board and front panel. That is: Instead of
+ multiple smaller cables, one wide (multi connector) cable.
+
++ Screw holes are too close to the edges on the front panel.
+
++ It would be better if screw heads were slightly buried within
+ construction body.
+
+
+Overall, it was good learning experience and I was able to test
+various ideas on it. Will add cooler later :)
+
+
+Photo of initial PSU + audio amp test:
+
+[[file:initial%20test.png]]
--- /dev/null
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
+#
+# Amplifier_Audio_TDA2030
+#
+DEF Amplifier_Audio_TDA2030 U 0 5 Y Y 1 F N
+F0 "U" 150 250 50 H V C CNN
+F1 "Amplifier_Audio_TDA2030" 150 150 50 H V C CNN
+F2 "Package_TO_SOT_THT:TO-220-5_P3.4x3.7mm_StaggerOdd_Lead3.8mm_Vertical" 0 0 50 H I C CIN
+F3 "" 0 0 50 H I C CNN
+ALIAS TDA2050
+$FPLIST
+ TO*220*StaggerOdd*
+$ENDFPLIST
+DRAW
+P 4 0 1 10 -200 200 200 0 -200 -200 -200 200 f
+X + 1 -300 100 100 R 50 50 1 1 I
+X - 2 -300 -100 100 R 50 50 1 1 I
+X -Vs 3 -100 -300 150 U 50 40 1 1 W
+X ~ 4 300 0 100 L 50 50 1 1 O
+X +Vs 5 -100 300 150 D 50 40 1 1 W
+ENDDRAW
+ENDDEF
+#
+# Connector_Conn_01x01_Male
+#
+DEF Connector_Conn_01x01_Male J 0 40 Y N 1 F N
+F0 "J" 0 100 50 H V C CNN
+F1 "Connector_Conn_01x01_Male" 0 -100 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Connector*:*
+$ENDFPLIST
+DRAW
+S 34 5 0 -5 1 1 6 F
+P 2 1 1 6 50 0 34 0 N
+X Pin_1 1 200 0 150 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_C
+#
+DEF Device_C C 0 10 N Y 1 F N
+F0 "C" 25 100 50 H V L CNN
+F1 "Device_C" 25 -100 50 H V L CNN
+F2 "" 38 -150 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ C_*
+$ENDFPLIST
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+P 2 0 1 20 -80 30 80 30 N
+X ~ 1 0 150 110 D 50 50 1 1 P
+X ~ 2 0 -150 110 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_D
+#
+DEF Device_D D 0 40 N N 1 F N
+F0 "D" 0 100 50 H V C CNN
+F1 "Device_D" 0 -100 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ TO-???*
+ *_Diode_*
+ *SingleDiode*
+ D_*
+$ENDFPLIST
+DRAW
+P 2 0 1 8 -50 50 -50 -50 N
+P 2 0 1 0 50 0 -50 0 N
+P 4 0 1 8 50 50 50 -50 -50 0 50 50 N
+X K 1 -150 0 100 R 50 50 1 1 P
+X A 2 150 0 100 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_R
+#
+DEF Device_R R 0 0 N Y 1 F N
+F0 "R" 80 0 50 V V C CNN
+F1 "Device_R" 0 0 50 V V C CNN
+F2 "" -70 0 50 V I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
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+X ~ 1 0 150 50 D 50 50 1 1 P
+X ~ 2 0 -150 50 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# power_GND
+#
+DEF power_GND #PWR 0 0 Y Y 1 F P
+F0 "#PWR" 0 -250 50 H I C CNN
+F1 "power_GND" 0 -150 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+P 6 0 1 0 0 0 0 -50 50 -50 0 -100 -50 -50 0 -50 N
+X GND 1 0 0 0 D 50 50 1 1 W N
+ENDDRAW
+ENDDEF
+#
+#End Library
--- /dev/null
+update=22/05/2015 07:44:53
+version=1
+last_client=kicad
+[general]
+version=1
+RootSch=
+BoardNm=
+[pcbnew]
+version=1
+LastNetListRead=
+UseCmpFile=1
+PadDrill=0.600000000000
+PadDrillOvalY=0.600000000000
+PadSizeH=1.500000000000
+PadSizeV=1.500000000000
+PcbTextSizeV=1.500000000000
+PcbTextSizeH=1.500000000000
+PcbTextThickness=0.300000000000
+ModuleTextSizeV=1.000000000000
+ModuleTextSizeH=1.000000000000
+ModuleTextSizeThickness=0.150000000000
+SolderMaskClearance=0.000000000000
+SolderMaskMinWidth=0.000000000000
+DrawSegmentWidth=0.200000000000
+BoardOutlineThickness=0.100000000000
+ModuleOutlineThickness=0.150000000000
+[cvpcb]
+version=1
+NetIExt=net
+[eeschema]
+version=1
+LibDir=
+[eeschema/libraries]
--- /dev/null
+EESchema Schematic File Version 4
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-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">DIY USB extension cable</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-<p>
-Original cable endings could not handle all the twisting, so why not
-to make new and better ones.
-</p>
-
-<p>
-There are 2 designs:
-</p>
-
-<ol class="org-ol">
-<li><a href="#sec-3">PLA + rubber/TPU design</a>
-</li>
-
-<li><a href="#sec-4">TPU only design</a>
-</li>
-</ol>
-</div>
-</div>
-
-<div id="outline-container-sec-3" class="outline-2">
-<h2 id="sec-3"><a id="ID-36c7eef2-83a1-440d-99a6-86d826ba0621" name="ID-36c7eef2-83a1-440d-99a6-86d826ba0621"></a><span class="section-number-2">3</span> PLA + rubber/TPU design</h2>
-<div class="outline-text-2" id="text-3">
-
-<figure>
-<p><img src="PLA%20+%20TPU/make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Following parts are glued together:
-<img src="PLA%20+%20TPU/make,%202.png" class="img-responsive" alt="make,%202.png">
-</p>
-</div>
-
-<div id="outline-container-sec-3-1" class="outline-3">
-<h3 id="sec-3-1"><span class="section-number-3">3.1</span> Male connector case</h3>
-<div class="outline-text-3" id="text-3-1">
-
-<figure>
-<p><img src="PLA%20+%20TPU/male%20connector%20case.png" class="img-responsive" alt="male%20connector%20case.png">
-</p>
-</figure>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="PLA + TPU/male%20connector%20case.FCStd">FreeCAD project</a>
-</li>
-<li><a href="PLA + TPU/male%20connector%20case.stl">STL file</a>
-</li>
-</ul>
-</div>
-</div>
-
-
-<div id="outline-container-sec-3-2" class="outline-3">
-<h3 id="sec-3-2"><span class="section-number-3">3.2</span> Female connector case</h3>
-<div class="outline-text-3" id="text-3-2">
-
-<figure>
-<p><img src="PLA%20+%20TPU/female%20connector%20case,%201.png" class="img-responsive" alt="female%20connector%20case,%201.png">
-</p>
-</figure>
-
-
-<figure>
-<p><img src="PLA%20+%20TPU/female%20connector%20case,%202.png" class="img-responsive" alt="female%20connector%20case,%202.png">
-</p>
-</figure>
-
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="PLA%20+%20TPU/female%20connector%20case.FCStd">FreeCAD project</a>
-</li>
-<li><a href="PLA%20+%20TPU/female%20connector%20case.stl">STL file</a>
-</li>
-</ul>
-</div>
-</div>
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-<div id="outline-container-sec-4" class="outline-2">
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-<div class="outline-text-2" id="text-4">
-
-<figure>
-<p><img src="TPU/make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-3D rendering of the cover:
-<img src="TPU/schematic.png" class="img-responsive" alt="schematic.png">
-</p>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="TPU/USB%20cover.FCStd">FreeCAD project</a>
-</li>
-<li><a href="TPU/USB%20cover.stl">STL file</a>
-</li>
-</ul>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-<li><a href="#sec-3">3. PLA + rubber/TPU design</a>
-<ul class="nav">
-<li><a href="#sec-3-1">3.1. Male connector case</a></li>
-<li><a href="#sec-3-2">3.2. Female connector case</a></li>
-</ul>
-</li>
-<li><a href="#sec-4">4. TPU only design for male connector case</a></li>
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-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-05-21 N 00:35</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
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+++ /dev/null
-#+TITLE: DIY USB extension cable
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
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-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-Original cable endings could not handle all the twisting, so why not
-to make new and better ones.
-
-There are 2 designs:
-
-1. [[id:36c7eef2-83a1-440d-99a6-86d826ba0621][PLA + rubber/TPU design]]
-
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-* PLA + rubber/TPU design
-:PROPERTIES:
-:ID: 36c7eef2-83a1-440d-99a6-86d826ba0621
-:END:
-
-[[file:PLA%20+%20TPU/make.png]]
-
-Following parts are glued together:
-[[file:PLA%20+%20TPU/make,%202.png]]
-
-** Male connector case
-[[file:PLA%20+%20TPU/male%20connector%20case.png]]
-
-Download:
-- [[file:PLA + TPU/male%20connector%20case.FCStd][FreeCAD project]]
-- [[file:PLA + TPU/male%20connector%20case.stl][STL file]]
-
-
-** Female connector case
-
-[[file:PLA%20+%20TPU/female%20connector%20case,%201.png]]
-
-[[file:PLA%20+%20TPU/female%20connector%20case,%202.png]]
-
-
-Download:
-- [[file:PLA%20+%20TPU/female%20connector%20case.FCStd][FreeCAD project]]
-- [[file:PLA%20+%20TPU/female%20connector%20case.stl][STL file]]
-
-* TPU only design for male connector case
-:PROPERTIES:
-:ID: b19bae1f-aa07-438f-aba0-276697a77355
-:END:
-
-[[file:TPU/make.png]]
-
-3D rendering of the cover:
-[[file:TPU/schematic.png]]
-
-Download:
-- [[file:TPU/USB%20cover.FCStd][FreeCAD project]]
-- [[file:TPU/USB%20cover.stl][STL file]]
--- /dev/null
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
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+$ENDFPLIST
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+X D+ 3 300 0 100 L 50 50 1 1 P
+X GND 4 0 -400 100 U 50 50 1 1 W
+X Shield 5 -100 -400 100 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_Lamp
+#
+DEF Device_Lamp LA 0 1 N N 1 F N
+F0 "LA" 25 150 50 H V L CNN
+F1 "Device_Lamp" 25 -150 50 H V L CNN
+F2 "" 0 100 50 V I C CNN
+F3 "" 0 100 50 V I C CNN
+DRAW
+C 0 0 100 0 1 0 N
+P 2 0 1 0 -70 70 70 -70 N
+P 2 0 1 0 70 70 -70 -70 N
+X - 1 0 -200 100 U 50 50 1 1 P
+X + 2 0 200 100 D 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_R
+#
+DEF Device_R R 0 0 N Y 1 F N
+F0 "R" 80 0 50 V V C CNN
+F1 "Device_R" 0 0 50 V V C CNN
+F2 "" -70 0 50 V I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ R_*
+$ENDFPLIST
+DRAW
+S -40 -100 40 100 0 1 10 N
+X ~ 1 0 150 50 D 50 50 1 1 P
+X ~ 2 0 -150 50 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Switch_SW_SPST
+#
+DEF Switch_SW_SPST SW 0 0 Y N 1 F N
+F0 "SW" 0 125 50 H V C CNN
+F1 "Switch_SW_SPST" 0 -100 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+C -80 0 20 0 0 0 N
+C 80 0 20 0 0 0 N
+P 2 0 0 0 -60 10 60 70 N
+X A 1 -200 0 100 R 50 50 1 1 P
+X B 2 200 0 100 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+#End Library
--- /dev/null
+(kicad_pcb (version 4) (host kicad "dummy file") )
--- /dev/null
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+version=1
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+BoardOutlineThickness=0.100000000000
+ModuleOutlineThickness=0.150000000000
+[cvpcb]
+version=1
+NetIExt=net
+[eeschema]
+version=1
+LibDir=
+[eeschema/libraries]
--- /dev/null
+EESchema Schematic File Version 4
+EELAYER 30 0
+EELAYER END
+$Descr A4 11693 8268
+encoding utf-8
+Sheet 1 1
+Title ""
+Date ""
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+$Comp
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+P 4150 3000
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+Wire Wire Line
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+Wire Wire Line
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+L Switch:SW_SPST SW5
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+L Switch:SW_SPST SW8
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+L Switch:SW_SPST SW11
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+F 0 "SW11" H 6250 3785 50 0000 C CNN
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+U 1 1 5F42FDF0
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+L Switch:SW_SPST SW14
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+F 0 "SW14" H 6750 3785 50 0000 C CNN
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+P 6750 3800
+F 0 "R10" V 6543 3800 50 0000 C CNN
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+ 1 6750 3800
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+L Switch:SW_SPST SW1
+U 1 1 5F4459DA
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+F 0 "SW1" H 4750 2985 50 0000 C CNN
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+L Switch:SW_SPST SW4
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+F 0 "SW4" H 5250 2985 50 0000 C CNN
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+F 2 "" H 5250 2750 50 0001 C CNN
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+Wire Wire Line
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+L Switch:SW_SPST SW7
+U 1 1 5F445A0B
+P 5750 2750
+F 0 "SW7" H 5750 2985 50 0000 C CNN
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+L Switch:SW_SPST SW10
+U 1 1 5F445A26
+P 6250 2750
+F 0 "SW10" H 6250 2985 50 0000 C CNN
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+F 2 "" H 6250 2750 50 0001 C CNN
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+ 1 6250 2750
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+$EndComp
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+L Switch:SW_SPST SW13
+U 1 1 5F445A3A
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+F 0 "SW13" H 6750 2985 50 0000 C CNN
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+ 1 6750 2750
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+U 1 1 5F445A44
+P 6750 3000
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+ 1 6750 3000
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+U 1 1 5F459AA3
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+ 1 6250 3000
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+U 1 1 5F48104F
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+F 3 "~" V 5750 3100 50 0001 C CNN
+ 1 5750 3000
+ 0 1 1 0
+$EndComp
+$Comp
+L Device:Lamp LA2
+U 1 1 5F4819AC
+P 5250 3000
+F 0 "LA2" V 4985 3000 50 0000 C CNN
+F 1 "Lamp" V 5076 3000 50 0000 C CNN
+F 2 "" V 5250 3100 50 0001 C CNN
+F 3 "~" V 5250 3100 50 0001 C CNN
+ 1 5250 3000
+ 0 1 1 0
+$EndComp
+$Comp
+L Device:Lamp LA1
+U 1 1 5F482195
+P 4750 3000
+F 0 "LA1" V 4485 3000 50 0000 C CNN
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+ 1 4750 3000
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+Wire Wire Line
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+$EndSCHEMATC
--- /dev/null
+EESchema Schematic File Version 4
+EELAYER 30 0
+EELAYER END
+$Descr A4 11693 8268
+encoding utf-8
+Sheet 1 1
+Title ""
+Date ""
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+$Comp
+L Connector:USB_A J1
+U 1 1 5F4101A8
+P 3850 3350
+F 0 "J1" H 3907 3817 50 0000 C CNN
+F 1 "USB_A" H 3907 3726 50 0000 C CNN
+F 2 "" H 4000 3300 50 0001 C CNN
+F 3 " ~" H 4000 3300 50 0001 C CNN
+ 1 3850 3350
+ 1 0 0 -1
+$EndComp
+Wire Wire Line
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+Wire Wire Line
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+$Comp
+L Switch:SW_SPST SW3
+U 1 1 5F410F20
+P 4750 4400
+F 0 "SW3" H 4750 4635 50 0000 C CNN
+F 1 "SW_SPST" H 4750 4544 50 0000 C CNN
+F 2 "" H 4750 4400 50 0001 C CNN
+F 3 "~" H 4750 4400 50 0001 C CNN
+ 1 4750 4400
+ 1 0 0 -1
+$EndComp
+$Comp
+L Device:R R2
+U 1 1 5F411557
+P 4750 4650
+F 0 "R2" V 4543 4650 50 0000 C CNN
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+ 1 4750 4650
+ 0 1 1 0
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+L Switch:SW_SPST SW6
+U 1 1 5F4130F6
+P 5250 4400
+F 0 "SW6" H 5250 4635 50 0000 C CNN
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+F 2 "" H 5250 4400 50 0001 C CNN
+F 3 "~" H 5250 4400 50 0001 C CNN
+ 1 5250 4400
+ 1 0 0 -1
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+$Comp
+L Device:R R4
+U 1 1 5F413100
+P 5250 4650
+F 0 "R4" V 5043 4650 50 0000 C CNN
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+F 2 "" V 5180 4650 50 0001 C CNN
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+U 1 1 5F416C76
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+F 0 "R6" V 5543 4650 50 0000 C CNN
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+L Switch:SW_SPST SW12
+U 1 1 5F41B671
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+F 0 "SW12" H 6250 4635 50 0000 C CNN
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+U 1 1 5F41B67B
+P 6250 4650
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+L Device:R R11
+U 1 1 5F41B690
+P 6750 4650
+F 0 "R11" V 6543 4650 50 0000 C CNN
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+L Switch:SW_SPST SW2
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+F 0 "SW2" H 4750 3785 50 0000 C CNN
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+L Device:R R1
+U 1 1 5F42FDA4
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+F 0 "R1" V 4543 3800 50 0000 C CNN
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+ 0 1 1 0
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+L Switch:SW_SPST SW5
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+F 2 "" H 5250 3550 50 0001 C CNN
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+$Comp
+L Device:R R3
+U 1 1 5F42FDBA
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--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>Adjustable resistor / indicator</title>
+<!-- 2020-08-22 L 15:39 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
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+
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+
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+
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+ font-size: 16px;
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+
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+
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+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Adjustable resistor / indicator</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+<ul class="org-ul">
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+<p>
+I needed a way to experimentally find resistance that works best in
+certain circuits. Usual potentiometers could not handle required power
+dissipation and were not precise enough.
+</p>
+
+<p>
+Solution is to build adjustable resistor:
+</p>
+
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Logically there is series of resistors that increase in resistance in
+the power of 2: 0.5, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512. Each
+resistor can be enabled or disabled by a switch. This makes entire
+range of 0 – 1023.5 ohms available with the 0.5 ohms precision.
+</p>
+
+<p>
+Schematic:
+<img src="schematic.png" class="img-responsive" alt="schematic.png">
+</p>
+
+<p>
+Here is front panel for switches:
+<img src="front%20panel.png" class="img-responsive" alt="front%20panel.png">
+</p>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="front%20panel.FCStd">FreeCAD project</a>
+</li>
+<li><a href="front%20panel.stl">STL file</a>
+</li>
+</ul>
+
+<p>
+Sometimes I would like to use lightbulbs with various parameters as
+test load/indicator. Current device has 4 of them included.
+</p>
+
+<p>
+Here is front panel for light bulbs:
+<img src="indicator%20panel.png" class="img-responsive" alt="indicator%20panel.png">
+</p>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="indicator%20panel.FCStd">FreeCAD project</a>
+</li>
+<li><a href="indicator%20panel.stl">STL file</a>
+</li>
+</ul>
+
+
+<p>
+After assembly using prototype PCB:
+<img src="make,%202.png" class="img-responsive" alt="make,%202.png">
+</p>
+
+
+<p>
+Following body is used as a case and PCB support:
+<img src="body.png" class="img-responsive" alt="body.png">
+</p>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="body%20and%20back%20cover.FCStd">FreeCAD project (body + back cover)</a>
+</li>
+<li><a href="body.stl">STL file for body</a>
+</li>
+</ul>
+
+<p>
+Result:
+<img src="make,%203.png" class="img-responsive" alt="make,%203.png">
+</p>
+
+<p>
+Cover on the back:
+<img src="back%20cover.png" class="img-responsive" alt="back%20cover.png">
+</p>
+
+<p>
+Download: <a href="back%20cover.stl">STL file</a>
+</p>
+
+<p>
+Button covers:
+<img src="button.png" class="img-responsive" alt="button.png">
+</p>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="button.FCStd">FreeCAD project</a>
+</li>
+<li><a href="button.stl">STL file</a>
+</li>
+</ul>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-08-22 L 15:39</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Adjustable resistor / indicator
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+I needed a way to experimentally find resistance that works best in
+certain circuits. Usual potentiometers could not handle required power
+dissipation and were not precise enough.
+
+Solution is to build adjustable resistor:
+
+[[file:make.png]]
+
+Logically there is series of resistors that increase in resistance in
+the power of 2: 0.5, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512. Each
+resistor can be enabled or disabled by a switch. This makes entire
+range of 0 -- 1023.5 ohms available with the 0.5 ohms precision.
+
+Schematic:
+[[file:schematic.png]]
+
+Here is front panel for switches:
+[[file:front%20panel.png]]
+
+Download:
++ [[file:front%20panel.FCStd][FreeCAD project]]
++ [[file:front%20panel.stl][STL file]]
+
+Sometimes I would like to use lightbulbs with various parameters as
+test load/indicator. Current device has 4 of them included.
+
+Here is front panel for light bulbs:
+[[file:indicator%20panel.png]]
+
+Download:
++ [[file:indicator%20panel.FCStd][FreeCAD project]]
++ [[file:indicator%20panel.stl][STL file]]
+
+
+After assembly using prototype PCB:
+[[file:make,%202.png]]
+
+
+Following body is used as a case and PCB support:
+[[file:body.png]]
+
+Download:
++ [[file:body%20and%20back%20cover.FCStd][FreeCAD project (body + back cover)]]
++ [[file:body.stl][STL file for body]]
+
+Result:
+[[file:make,%203.png]]
+
+Cover on the back:
+[[file:back%20cover.png]]
+
+Download: [[file:back%20cover.stl][STL file]]
+
+Button covers:
+[[file:button.png]]
+
+Download:
++ [[file:button.FCStd][FreeCAD project]]
++ [[file:button.stl][STL file]]
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>AA and AAA battery tester</title>
+<!-- 2020-05-24 P 23:55 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">AA and AAA battery tester</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+
+<figure>
+<p><img src="make,%202.png" class="img-responsive" alt="make,%202.png">
+</p>
+</figure>
+
+<p>
+Simple rechargeable Ni-MH battery tester. The problem with those
+batteries is: right after you take them out of charger, voltage level
+at their terminals is good. But some old batteries will get
+empty/discharged way too quickly under normal load. This device is
+intended to discover old batteries with reduced capacity.
+</p>
+
+<p>
+Freshly charged batteries are tested under high load for short time by
+shorting battery + and - terminals using 5 ohm power resistor
+(R1). Simultaneously battery voltage is being measured while under
+load.
+</p>
+
+
+<figure>
+<p><img src="electrical%20schematic.png" class="img-responsive" alt="electrical%20schematic.png">
+</p>
+</figure>
+
+<p>
+I use vintage analog voltmeter. Instead of power resistor I use
+Nichrome resistance wire. Test/measurement button should not be
+pressed for long because power resistor gets hot quickly and battery
+is being quickly depleted during measurement.
+</p>
+
+
+<figure>
+<p><img src="assembly.png" class="img-responsive" alt="assembly.png">
+</p>
+</figure>
+
+<ul class="org-ul">
+<li>Body: <img src="body.png" class="img-responsive" alt="body.png">
+</li>
+<li>Cover: <img src="cover.png" class="img-responsive" alt="cover.png">
+</li>
+
+<li>Download:
+<ul class="org-ul">
+<li><a href="bodyAndCover.FCStd">FreeCAD project</a>
+</li>
+<li><a href="body.stl">body STL file</a>
+</li>
+<li><a href="cover.stl">cover STL file</a>
+</li>
+</ul>
+</li>
+
+<li>PS: While this device is interesting to build, still you can just
+use ordinary ammeter that can handle battery generated current.
+</li>
+</ul>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-05-24 P 23:55</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: AA and AAA battery tester
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Author:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+[[file:make.png]]
+
+[[file:make,%202.png]]
+
+Simple rechargeable Ni-MH battery tester. The problem with those
+batteries is: right after you take them out of charger, voltage level
+at their terminals is good. But some old batteries will get
+empty/discharged way too quickly under normal load. This device is
+intended to discover old batteries with reduced capacity.
+
+Freshly charged batteries are tested under high load for short time by
+shorting battery + and - terminals using 5 ohm power resistor
+(R1). Simultaneously battery voltage is being measured while under
+load.
+
+[[file:electrical%20schematic.png]]
+
+I use vintage analog voltmeter. Instead of power resistor I use
+Nichrome resistance wire. Test/measurement button should not be
+pressed for long because power resistor gets hot quickly and battery
+is being quickly depleted during measurement.
+
+[[file:assembly.png]]
+
++ Body: [[file:body.png]]
++ Cover: [[file:cover.png]]
+
++ Download:
+ + [[file:bodyAndCover.FCStd][FreeCAD project]]
+ + [[file:body.stl][body STL file]]
+ + [[file:cover.stl][cover STL file]]
+
++ PS: While this device is interesting to build, still you can just
+ use ordinary ammeter that can handle battery generated current.
--- /dev/null
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
+#
+# Device_Battery
+#
+DEF Device_Battery BT 0 0 N N 1 F N
+F0 "BT" 100 100 50 H V L CNN
+F1 "Device_Battery" 100 0 50 H V L CNN
+F2 "" 0 60 50 V I C CNN
+F3 "" 0 60 50 V I C CNN
+DRAW
+S -80 -55 80 -65 0 1 0 F
+S -80 70 80 60 0 1 0 F
+S -52 -78 50 -98 0 1 0 F
+S -52 47 50 27 0 1 0 F
+P 2 0 1 0 0 -60 0 -50 N
+P 2 0 1 0 0 -40 0 -30 N
+P 2 0 1 0 0 -20 0 -10 N
+P 2 0 1 0 0 0 0 10 N
+P 2 0 1 0 0 20 0 30 N
+P 2 0 1 0 0 70 0 100 N
+P 2 0 1 10 10 105 50 105 N
+P 2 0 1 10 30 125 30 85 N
+X + 1 0 200 100 D 50 50 1 1 P
+X - 2 0 -200 100 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_R
+#
+DEF Device_R R 0 0 N Y 1 F N
+F0 "R" 80 0 50 V V C CNN
+F1 "Device_R" 0 0 50 V V C CNN
+F2 "" -70 0 50 V I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ R_*
+$ENDFPLIST
+DRAW
+S -40 -100 40 100 0 1 10 N
+X ~ 1 0 150 50 D 50 50 1 1 P
+X ~ 2 0 -150 50 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_R_POT
+#
+DEF Device_R_POT RV 0 40 Y N 1 F N
+F0 "RV" -175 0 50 V V C CNN
+F1 "Device_R_POT" -100 0 50 V V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Potentiometer*
+$ENDFPLIST
+DRAW
+S 40 100 -40 -100 0 1 10 N
+P 2 0 1 0 100 0 60 0 N
+P 4 0 1 0 45 0 90 20 90 -20 45 0 F
+X 1 1 0 150 50 D 50 50 1 1 P
+X 2 2 150 0 50 L 50 50 1 1 P
+X 3 3 0 -150 50 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_Voltmeter_DC
+#
+DEF Device_Voltmeter_DC MES 0 1 N N 1 F N
+F0 "MES" -130 40 50 H V R CNN
+F1 "Device_Voltmeter_DC" -130 -30 50 H V R CNN
+F2 "" 0 100 50 V I C CNN
+F3 "" 0 100 50 V I C CNN
+DRAW
+C 0 0 100 0 1 10 N
+T 0 0 0 100 0 0 0 V Normal 0 C C
+P 2 0 0 0 -125 -125 -75 -75 N
+P 2 0 0 0 75 75 125 125 N
+P 3 0 0 0 75 125 125 125 125 75 N
+P 2 0 1 0 10 150 30 150 N
+P 2 0 1 0 20 160 20 140 N
+X - 1 0 -200 100 U 50 50 1 1 P
+X + 2 0 200 100 D 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Switch_SW_SPST
+#
+DEF Switch_SW_SPST SW 0 0 Y N 1 F N
+F0 "SW" 0 125 50 H V C CNN
+F1 "Switch_SW_SPST" 0 -100 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+C -80 0 20 0 0 0 N
+C 80 0 20 0 0 0 N
+P 2 0 0 0 -60 10 60 70 N
+X A 1 -200 0 100 R 50 50 1 1 P
+X B 2 200 0 100 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+#End Library
--- /dev/null
+EESchema Schematic File Version 4
+EELAYER 30 0
+EELAYER END
+$Descr A4 11693 8268
+encoding utf-8
+Sheet 1 1
+Title ""
+Date ""
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+$Comp
+L Device:Battery BT1
+U 1 1 5EC97EC8
+P 2600 3750
+F 0 "BT1" H 2708 3796 50 0000 L CNN
+F 1 "Battery" H 2708 3705 50 0000 L CNN
+F 2 "" V 2600 3810 50 0001 C CNN
+F 3 "~" V 2600 3810 50 0001 C CNN
+ 1 2600 3750
+ 1 0 0 -1
+$EndComp
+$Comp
+L Switch:SW_SPST SW1
+U 1 1 5EC98542
+P 3100 3250
+F 0 "SW1" H 3100 3485 50 0000 C CNN
+F 1 "SW_SPST" H 3100 3394 50 0000 C CNN
+F 2 "" H 3100 3250 50 0001 C CNN
+F 3 "~" H 3100 3250 50 0001 C CNN
+ 1 3100 3250
+ 1 0 0 -1
+$EndComp
+$Comp
+L Device:R R1
+U 1 1 5EC98B01
+P 3550 3700
+F 0 "R1" H 3620 3746 50 0000 L CNN
+F 1 "5" H 3620 3655 50 0000 L CNN
+F 2 "" V 3480 3700 50 0001 C CNN
+F 3 "~" H 3550 3700 50 0001 C CNN
+ 1 3550 3700
+ 1 0 0 -1
+$EndComp
+$Comp
+L Device:R R2
+U 1 1 5EC98F38
+P 3850 3250
+F 0 "R2" V 3643 3250 50 0000 C CNN
+F 1 "3k" V 3734 3250 50 0000 C CNN
+F 2 "" V 3780 3250 50 0001 C CNN
+F 3 "~" H 3850 3250 50 0001 C CNN
+ 1 3850 3250
+ 0 1 1 0
+$EndComp
+$Comp
+L Device:R_POT RV1
+U 1 1 5EC99ABB
+P 4350 3250
+F 0 "RV1" V 4143 3250 50 0000 C CNN
+F 1 "3k3" V 4234 3250 50 0000 C CNN
+F 2 "" H 4350 3250 50 0001 C CNN
+F 3 "~" H 4350 3250 50 0001 C CNN
+ 1 4350 3250
+ 0 1 1 0
+$EndComp
+$Comp
+L Device:Voltmeter_DC MES1
+U 1 1 5EC9A7E7
+P 4350 3750
+F 0 "MES1" H 4503 3796 50 0000 L CNN
+F 1 "Voltmeter_DC" H 4503 3705 50 0000 L CNN
+F 2 "" V 4350 3850 50 0001 C CNN
+F 3 "~" V 4350 3850 50 0001 C CNN
+ 1 4350 3750
+ 1 0 0 -1
+$EndComp
+Wire Wire Line
+ 2600 3550 2600 3250
+Wire Wire Line
+ 2600 3250 2900 3250
+Wire Wire Line
+ 3300 3250 3550 3250
+Wire Wire Line
+ 4000 3250 4200 3250
+Wire Wire Line
+ 4350 3400 4350 3550
+Wire Wire Line
+ 4350 3950 4350 4100
+Wire Wire Line
+ 4350 4100 3550 4100
+Wire Wire Line
+ 3550 4100 3550 3850
+Wire Wire Line
+ 2600 3950 2600 4100
+Wire Wire Line
+ 2600 4100 3550 4100
+Connection ~ 3550 4100
+Wire Wire Line
+ 3550 3550 3550 3250
+Connection ~ 3550 3250
+Wire Wire Line
+ 3550 3250 3700 3250
+$EndSCHEMATC
--- /dev/null
+<!doctype html>
+<html lang="en">
+<head>
+<title>Window holder</title>
+<!-- 2020-06-22 Mon 20:54 -->
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="generator" content="Org-mode">
+<meta name="author" content="Svjatoslav Agejenko">
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<style type="text/css">
+/* org mode styles on top of twbs */
+
+html {
+ position: relative;
+ min-height: 100%;
+}
+
+body {
+ font-size: 18px;
+ margin-bottom: 105px;
+}
+
+footer {
+ position: absolute;
+ bottom: 0;
+ width: 100%;
+ height: 101px;
+ background-color: #f5f5f5;
+}
+
+footer > div {
+ padding: 10px;
+}
+
+footer p {
+ margin: 0 0 5px;
+ text-align: center;
+ font-size: 16px;
+}
+
+#table-of-contents {
+ margin-top: 20px;
+ margin-bottom: 20px;
+}
+
+blockquote p {
+ font-size: 18px;
+}
+
+pre {
+ font-size: 16px;
+}
+
+.footpara {
+ display: inline-block;
+}
+
+figcaption {
+ font-size: 16px;
+ color: #666;
+ font-style: italic;
+ padding-bottom: 15px;
+}
+
+/* from twbs docs */
+
+.bs-docs-sidebar.affix {
+ position: static;
+}
+@media (min-width: 768px) {
+ .bs-docs-sidebar {
+ padding-left: 20px;
+ }
+}
+
+/* All levels of nav */
+.bs-docs-sidebar .nav > li > a {
+ display: block;
+ padding: 4px 20px;
+ font-size: 14px;
+ font-weight: 500;
+ color: #999;
+}
+.bs-docs-sidebar .nav > li > a:hover,
+.bs-docs-sidebar .nav > li > a:focus {
+ padding-left: 19px;
+ color: #A1283B;
+ text-decoration: none;
+ background-color: transparent;
+ border-left: 1px solid #A1283B;
+}
+.bs-docs-sidebar .nav > .active > a,
+.bs-docs-sidebar .nav > .active:hover > a,
+.bs-docs-sidebar .nav > .active:focus > a {
+ padding-left: 18px;
+ font-weight: bold;
+ color: #A1283B;
+ background-color: transparent;
+ border-left: 2px solid #A1283B;
+}
+
+/* Nav: second level (shown on .active) */
+.bs-docs-sidebar .nav .nav {
+ display: none; /* Hide by default, but at >768px, show it */
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 30px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav > li > a:focus {
+ padding-left: 29px;
+}
+.bs-docs-sidebar .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav > .active:focus > a {
+ padding-left: 28px;
+ font-weight: 500;
+}
+
+/* Nav: third level (shown on .active) */
+.bs-docs-sidebar .nav .nav .nav {
+ padding-bottom: 10px;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a {
+ padding-top: 1px;
+ padding-bottom: 1px;
+ padding-left: 40px;
+ font-size: 12px;
+ font-weight: normal;
+}
+.bs-docs-sidebar .nav .nav .nav > li > a:hover,
+.bs-docs-sidebar .nav .nav .nav > li > a:focus {
+ padding-left: 39px;
+}
+.bs-docs-sidebar .nav .nav .nav > .active > a,
+.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
+.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
+ padding-left: 38px;
+ font-weight: 500;
+}
+
+/* Show and affix the side nav when space allows it */
+@media (min-width: 992px) {
+ .bs-docs-sidebar .nav > .active > ul {
+ display: block;
+ }
+ /* Widen the fixed sidebar */
+ .bs-docs-sidebar.affix,
+ .bs-docs-sidebar.affix-bottom {
+ width: 213px;
+ }
+ .bs-docs-sidebar.affix {
+ position: fixed; /* Undo the static from mobile first approach */
+ top: 20px;
+ }
+ .bs-docs-sidebar.affix-bottom {
+ position: absolute; /* Undo the static from mobile first approach */
+ }
+ .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
+ margin-top: 0;
+ margin-bottom: 0
+ }
+}
+@media (min-width: 1200px) {
+ /* Widen the fixed sidebar again */
+ .bs-docs-sidebar.affix-bottom,
+ .bs-docs-sidebar.affix {
+ width: 263px;
+ }
+}
+</style>
+<script type="text/javascript">
+$(function() {
+ 'use strict';
+
+ $('.bs-docs-sidebar li').first().addClass('active');
+
+ $(document.body).scrollspy({target: '.bs-docs-sidebar'});
+
+ $('.bs-docs-sidebar').affix();
+});
+</script>
+</head>
+<body>
+<div id="content" class="container">
+<div class="row"><div class="col-md-9"><h1 class="title">Window holder</h1>
+
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+DESIGNS AT YOUR OWN RISK.
+</li>
+
+<li>This design is released under Creative Commons Zero (CC0) license.
+</li>
+
+<li>Authors:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko
+<ul class="org-ul">
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
+</li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+
+<li>Valeria Agejenko
+</li>
+</ul>
+</li>
+
+<li>See also:
+<ul class="org-ul">
+<li><a href="../../index.html">Other physical projects in this repository</a>
+</li>
+<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
+</li>
+</ul>
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
+<div class="outline-text-2" id="text-2">
+
+<figure>
+<p><img src="make.png" class="img-responsive" alt="make.png">
+</p>
+</figure>
+
+<p>
+Keeps window open so that strong wind will not slam it close.
+</p>
+
+
+<figure>
+<p><img src="schematic.png" class="img-responsive" alt="schematic.png">
+</p>
+</figure>
+
+<p>
+Download:
+</p>
+<ul class="org-ul">
+<li><a href="window%20fixator.stl">STL file</a>
+</li>
+<li><a href="window%20fixator.FCStd">FreeCAD file</a>
+</li>
+</ul>
+</div>
+</div>
+</div><div class="col-md-3"><nav id="table-of-contents">
+<div id="text-table-of-contents" class="bs-docs-sidebar">
+<ul class="nav">
+<li><a href="#sec-1">1. General</a></li>
+<li><a href="#sec-2">2. Project description</a></li>
+</ul>
+</div>
+</nav>
+</div></div></div>
+<footer id="postamble" class="">
+<div><p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2020-06-22 Mon 20:54</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
+</div>
+</footer>
+</body>
+</html>
--- /dev/null
+#+TITLE: Window holder
+#+AUTHOR: Svjatoslav Agejenko
+#+LANGUAGE: en
+
+* (document settings) :noexport:
+** use dark style for TWBS-HTML exporter
+#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+#+HTML_HEAD: <style type="text/css">
+#+HTML_HEAD: footer {background-color: #111 !important;}
+#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
+#+HTML_HEAD: </style>
+
+* General
++ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
+ COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
+ DESIGNS AT YOUR OWN RISK.
+
++ This design is released under Creative Commons Zero (CC0) license.
+
++ Authors:
+ - Svjatoslav Agejenko
+ - Homepage: https://svjatoslav.eu
+ - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
+
+ - Valeria Agejenko
+
++ See also:
+ - [[../../index.html][Other physical projects in this repository]]
+ - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
+
+* Project description
+[[file:make.png]]
+
+Keeps window open so that strong wind will not slam it close.
+
+[[file:schematic.png]]
+
+Download:
++ [[file:window%20fixator.stl][STL file]]
++ [[file:window%20fixator.FCStd][FreeCAD file]]
+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>Fujifilm XC15-45mm lens case</title>
-<!-- 2020-11-20 R 21:51 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-<style type="text/css">
-footer {background-color: #111 !important;}
-pre {background-color: #111; color: #ccc;}
-</style>
-<style type="text/css">
-/* org mode styles on top of twbs */
-
-html {
- position: relative;
- min-height: 100%;
-}
-
-body {
- font-size: 18px;
- margin-bottom: 105px;
-}
-
-footer {
- position: absolute;
- bottom: 0;
- width: 100%;
- height: 101px;
- background-color: #f5f5f5;
-}
-
-footer > div {
- padding: 10px;
-}
-
-footer p {
- margin: 0 0 5px;
- text-align: center;
- font-size: 16px;
-}
-
-#table-of-contents {
- margin-top: 20px;
- margin-bottom: 20px;
-}
-
-blockquote p {
- font-size: 18px;
-}
-
-pre {
- font-size: 16px;
-}
-
-.footpara {
- display: inline-block;
-}
-
-figcaption {
- font-size: 16px;
- color: #666;
- font-style: italic;
- padding-bottom: 15px;
-}
-
-/* from twbs docs */
-
-.bs-docs-sidebar.affix {
- position: static;
-}
-@media (min-width: 768px) {
- .bs-docs-sidebar {
- padding-left: 20px;
- }
-}
-
-/* All levels of nav */
-.bs-docs-sidebar .nav > li > a {
- display: block;
- padding: 4px 20px;
- font-size: 14px;
- font-weight: 500;
- color: #999;
-}
-.bs-docs-sidebar .nav > li > a:hover,
-.bs-docs-sidebar .nav > li > a:focus {
- padding-left: 19px;
- color: #A1283B;
- text-decoration: none;
- background-color: transparent;
- border-left: 1px solid #A1283B;
-}
-.bs-docs-sidebar .nav > .active > a,
-.bs-docs-sidebar .nav > .active:hover > a,
-.bs-docs-sidebar .nav > .active:focus > a {
- padding-left: 18px;
- font-weight: bold;
- color: #A1283B;
- background-color: transparent;
- border-left: 2px solid #A1283B;
-}
-
-/* Nav: second level (shown on .active) */
-.bs-docs-sidebar .nav .nav {
- display: none; /* Hide by default, but at >768px, show it */
- padding-bottom: 10px;
-}
-.bs-docs-sidebar .nav .nav > li > a {
- padding-top: 1px;
- padding-bottom: 1px;
- padding-left: 30px;
- font-size: 12px;
- font-weight: normal;
-}
-.bs-docs-sidebar .nav .nav > li > a:hover,
-.bs-docs-sidebar .nav .nav > li > a:focus {
- padding-left: 29px;
-}
-.bs-docs-sidebar .nav .nav > .active > a,
-.bs-docs-sidebar .nav .nav > .active:hover > a,
-.bs-docs-sidebar .nav .nav > .active:focus > a {
- padding-left: 28px;
- font-weight: 500;
-}
-
-/* Nav: third level (shown on .active) */
-.bs-docs-sidebar .nav .nav .nav {
- padding-bottom: 10px;
-}
-.bs-docs-sidebar .nav .nav .nav > li > a {
- padding-top: 1px;
- padding-bottom: 1px;
- padding-left: 40px;
- font-size: 12px;
- font-weight: normal;
-}
-.bs-docs-sidebar .nav .nav .nav > li > a:hover,
-.bs-docs-sidebar .nav .nav .nav > li > a:focus {
- padding-left: 39px;
-}
-.bs-docs-sidebar .nav .nav .nav > .active > a,
-.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
-.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
- padding-left: 38px;
- font-weight: 500;
-}
-
-/* Show and affix the side nav when space allows it */
-@media (min-width: 992px) {
- .bs-docs-sidebar .nav > .active > ul {
- display: block;
- }
- /* Widen the fixed sidebar */
- .bs-docs-sidebar.affix,
- .bs-docs-sidebar.affix-bottom {
- width: 213px;
- }
- .bs-docs-sidebar.affix {
- position: fixed; /* Undo the static from mobile first approach */
- top: 20px;
- }
- .bs-docs-sidebar.affix-bottom {
- position: absolute; /* Undo the static from mobile first approach */
- }
- .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
- margin-top: 0;
- margin-bottom: 0
- }
-}
-@media (min-width: 1200px) {
- /* Widen the fixed sidebar again */
- .bs-docs-sidebar.affix-bottom,
- .bs-docs-sidebar.affix {
- width: 263px;
- }
-}
-</style>
-<script type="text/javascript">
-$(function() {
- 'use strict';
-
- $('.bs-docs-sidebar li').first().addClass('active');
-
- $(document.body).scrollspy({target: '.bs-docs-sidebar'});
-
- $('.bs-docs-sidebar').affix();
-});
-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Fujifilm XC15-45mm lens case</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Case for Fujifilm XC15-45mm lens.
-</p>
-
-<p>
-Design utilizes <a href="https://www.amazon.de/gp/product/B00TACKU0O/">3mm x 2mm thick neodymium magnets</a>.
-</p>
-
-<p>
-Schematic assembled:
-<img src="assembled.png" class="img-responsive" alt="assembled.png">
-</p>
-
-<ul class="org-ul">
-<li>see also:
-<ul class="org-ul">
-<li><a href="../Fuji%20XC50-230mm%20lens%20case/">Fujifilm XC50-230mm lens case</a>
-</li>
-<li><a href="../Fujifilm%20camera%20battery%20box/">Fujifilm camera battery box</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-3" class="outline-2">
-<h2 id="sec-3"><span class="section-number-2">3</span> Files</h2>
-<div class="outline-text-2" id="text-3">
-<p>
-You can <a href="Fuji%20camera%20lens%20container.FCStd">download FreeCAD project</a> file to tweak design or generated STL
-files ready for 3D printing:
-</p>
-
-<p>
-Body: <a href="body.stl">body.stl</a>
-<img src="body.png" class="img-responsive" alt="body.png">
-</p>
-
-<p>
-Cover: <a href="cover.stl">cover.stl</a>
-<img src="cover.png" class="img-responsive" alt="cover.png">
-</p>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-<li><a href="#sec-3">3. Files</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-11-20 R 21:51</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Fujifilm XC15-45mm lens case
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-[[file:make.png]]
-
-Case for Fujifilm XC15-45mm lens.
-
-Design utilizes [[https://www.amazon.de/gp/product/B00TACKU0O/][3mm x 2mm thick neodymium magnets]].
-
-Schematic assembled:
-[[file:assembled.png]]
-
-- see also:
- - [[file:../Fuji%20XC50-230mm%20lens%20case/][Fujifilm XC50-230mm lens case]]
- - [[file:../Fujifilm%20camera%20battery%20box/][Fujifilm camera battery box]]
-
-* Files
-
-You can [[file:Fuji%20camera%20lens%20container.FCStd][download FreeCAD project]] file to tweak design or generated STL
-files ready for 3D printing:
-
-Body: [[file:body.stl][body.stl]]
-[[file:body.png]]
-
-Cover: [[file:cover.stl][cover.stl]]
-[[file:cover.png]]
+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>Fujifilm XC50-230mm lens case</title>
-<!-- 2020-11-20 R 21:45 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-<style type="text/css">
-footer {background-color: #111 !important;}
-pre {background-color: #111; color: #ccc;}
-</style>
-<style type="text/css">
-/* org mode styles on top of twbs */
-
-html {
- position: relative;
- min-height: 100%;
-}
-
-body {
- font-size: 18px;
- margin-bottom: 105px;
-}
-
-footer {
- position: absolute;
- bottom: 0;
- width: 100%;
- height: 101px;
- background-color: #f5f5f5;
-}
-
-footer > div {
- padding: 10px;
-}
-
-footer p {
- margin: 0 0 5px;
- text-align: center;
- font-size: 16px;
-}
-
-#table-of-contents {
- margin-top: 20px;
- margin-bottom: 20px;
-}
-
-blockquote p {
- font-size: 18px;
-}
-
-pre {
- font-size: 16px;
-}
-
-.footpara {
- display: inline-block;
-}
-
-figcaption {
- font-size: 16px;
- color: #666;
- font-style: italic;
- padding-bottom: 15px;
-}
-
-/* from twbs docs */
-
-.bs-docs-sidebar.affix {
- position: static;
-}
-@media (min-width: 768px) {
- .bs-docs-sidebar {
- padding-left: 20px;
- }
-}
-
-/* All levels of nav */
-.bs-docs-sidebar .nav > li > a {
- display: block;
- padding: 4px 20px;
- font-size: 14px;
- font-weight: 500;
- color: #999;
-}
-.bs-docs-sidebar .nav > li > a:hover,
-.bs-docs-sidebar .nav > li > a:focus {
- padding-left: 19px;
- color: #A1283B;
- text-decoration: none;
- background-color: transparent;
- border-left: 1px solid #A1283B;
-}
-.bs-docs-sidebar .nav > .active > a,
-.bs-docs-sidebar .nav > .active:hover > a,
-.bs-docs-sidebar .nav > .active:focus > a {
- padding-left: 18px;
- font-weight: bold;
- color: #A1283B;
- background-color: transparent;
- border-left: 2px solid #A1283B;
-}
-
-/* Nav: second level (shown on .active) */
-.bs-docs-sidebar .nav .nav {
- display: none; /* Hide by default, but at >768px, show it */
- padding-bottom: 10px;
-}
-.bs-docs-sidebar .nav .nav > li > a {
- padding-top: 1px;
- padding-bottom: 1px;
- padding-left: 30px;
- font-size: 12px;
- font-weight: normal;
-}
-.bs-docs-sidebar .nav .nav > li > a:hover,
-.bs-docs-sidebar .nav .nav > li > a:focus {
- padding-left: 29px;
-}
-.bs-docs-sidebar .nav .nav > .active > a,
-.bs-docs-sidebar .nav .nav > .active:hover > a,
-.bs-docs-sidebar .nav .nav > .active:focus > a {
- padding-left: 28px;
- font-weight: 500;
-}
-
-/* Nav: third level (shown on .active) */
-.bs-docs-sidebar .nav .nav .nav {
- padding-bottom: 10px;
-}
-.bs-docs-sidebar .nav .nav .nav > li > a {
- padding-top: 1px;
- padding-bottom: 1px;
- padding-left: 40px;
- font-size: 12px;
- font-weight: normal;
-}
-.bs-docs-sidebar .nav .nav .nav > li > a:hover,
-.bs-docs-sidebar .nav .nav .nav > li > a:focus {
- padding-left: 39px;
-}
-.bs-docs-sidebar .nav .nav .nav > .active > a,
-.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
-.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
- padding-left: 38px;
- font-weight: 500;
-}
-
-/* Show and affix the side nav when space allows it */
-@media (min-width: 992px) {
- .bs-docs-sidebar .nav > .active > ul {
- display: block;
- }
- /* Widen the fixed sidebar */
- .bs-docs-sidebar.affix,
- .bs-docs-sidebar.affix-bottom {
- width: 213px;
- }
- .bs-docs-sidebar.affix {
- position: fixed; /* Undo the static from mobile first approach */
- top: 20px;
- }
- .bs-docs-sidebar.affix-bottom {
- position: absolute; /* Undo the static from mobile first approach */
- }
- .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
- margin-top: 0;
- margin-bottom: 0
- }
-}
-@media (min-width: 1200px) {
- /* Widen the fixed sidebar again */
- .bs-docs-sidebar.affix-bottom,
- .bs-docs-sidebar.affix {
- width: 263px;
- }
-}
-</style>
-<script type="text/javascript">
-$(function() {
- 'use strict';
-
- $('.bs-docs-sidebar li').first().addClass('active');
-
- $(document.body).scrollspy({target: '.bs-docs-sidebar'});
-
- $('.bs-docs-sidebar').affix();
-});
-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Fujifilm XC50-230mm lens case</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Case for Fujifilm XC50-230mm lens.
-</p>
-
-<p>
-Design utilizes <a href="https://www.amazon.de/gp/product/B00TACKU0O/">3mm x 2mm thick neodymium magnets</a>.
-</p>
-
-<p>
-Schematic assembled:
-<img src="assembled.png" class="img-responsive" alt="assembled.png">
-</p>
-</div>
-</div>
-<div id="outline-container-sec-3" class="outline-2">
-<h2 id="sec-3"><span class="section-number-2">3</span> Files</h2>
-<div class="outline-text-2" id="text-3">
-<p>
-You can <a href="Fuji%20camera%20lens%20container.FCStd">download FreeCAD project</a> file to tweak design or generated STL
-files ready for 3D printing:
-</p>
-
-<p>
-Body: <a href="body.stl">body.stl</a>
-<img src="body.png" class="img-responsive" alt="body.png">
-</p>
-
-<p>
-Cover: <a href="cover.stl">cover.stl</a>
-<img src="cover.png" class="img-responsive" alt="cover.png">
-</p>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-<li><a href="#sec-3">3. Files</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-11-20 R 21:45</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Fujifilm XC50-230mm lens case
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
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-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-[[file:make.png]]
-
-Case for Fujifilm XC50-230mm lens.
-
-Design utilizes [[https://www.amazon.de/gp/product/B00TACKU0O/][3mm x 2mm thick neodymium magnets]].
-
-Schematic assembled:
-[[file:assembled.png]]
-* Files
-
-You can [[file:Fuji%20camera%20lens%20container.FCStd][download FreeCAD project]] file to tweak design or generated STL
-files ready for 3D printing:
-
-Body: [[file:body.stl][body.stl]]
-[[file:body.png]]
-
-Cover: [[file:cover.stl][cover.stl]]
-[[file:cover.png]]
+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>Fujifilm camera battery box</title>
-<!-- 2020-03-21 Sat 00:37 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
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-@media (min-width: 1200px) {
- /* Widen the fixed sidebar again */
- .bs-docs-sidebar.affix-bottom,
- .bs-docs-sidebar.affix {
- width: 263px;
- }
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-</style>
-<script type="text/javascript">
-$(function() {
- 'use strict';
-
- $('.bs-docs-sidebar li').first().addClass('active');
-
- $(document.body).scrollspy({target: '.bs-docs-sidebar'});
-
- $('.bs-docs-sidebar').affix();
-});
-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Fujifilm camera battery box</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Carrying case for spare Fujifilm camera Newell NP-W126 batteries.
-</p>
-
-<p>
-Design utilizes <a href="https://www.amazon.de/gp/product/B00TACKU0O/">3mm x 2mm thick neodymium magnets</a>.
-</p>
-</div>
-</div>
-<div id="outline-container-sec-3" class="outline-2">
-<h2 id="sec-3"><span class="section-number-2">3</span> Files</h2>
-<div class="outline-text-2" id="text-3">
-<p>
-You can <a href="body%20and%20cover.FCStd">download FreeCAD project</a> file to tweak design or generated STL
-files ready for 3D printing:
-</p>
-
-<ul class="org-ul">
-<li>Body: <a href="body.stl">download STL</a>
-<ul class="org-ul">
-<li><img src="body.png" class="img-responsive" alt="body.png">
-</li>
-</ul>
-</li>
-
-<li>Cover: <a href="cover.stl">download STL</a>
-<ul class="org-ul">
-<li><img src="cover.png" class="img-responsive" alt="cover.png">
-</li>
-</ul>
-</li>
-</ul>
-</div>
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-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-<li><a href="#sec-3">3. Files</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-03-21 Sat 00:37</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Fujifilm camera battery box
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-[[file:make.png]]
-
-Carrying case for spare Fujifilm camera Newell NP-W126 batteries.
-
-Design utilizes [[https://www.amazon.de/gp/product/B00TACKU0O/][3mm x 2mm thick neodymium magnets]].
-* Files
-You can [[file:body%20and%20cover.FCStd][download FreeCAD project]] file to tweak design or generated STL
-files ready for 3D printing:
-
-+ Body: [[file:body.stl][download STL]]
- + [[file:body.png]]
-
-+ Cover: [[file:cover.stl][download STL]]
- + [[file:cover.png]]
+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>Macro filter storage compartment</title>
-<!-- 2020-03-21 Sat 00:37 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-<style type="text/css">
-footer {background-color: #111 !important;}
-pre {background-color: #111; color: #ccc;}
-</style>
-<style type="text/css">
-/* org mode styles on top of twbs */
-
-html {
- position: relative;
- min-height: 100%;
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-
-body {
- font-size: 18px;
- margin-bottom: 105px;
-}
-
-footer {
- position: absolute;
- bottom: 0;
- width: 100%;
- height: 101px;
- background-color: #f5f5f5;
-}
-
-footer > div {
- padding: 10px;
-}
-
-footer p {
- margin: 0 0 5px;
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- /* Widen the fixed sidebar */
- .bs-docs-sidebar.affix,
- .bs-docs-sidebar.affix-bottom {
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-@media (min-width: 1200px) {
- /* Widen the fixed sidebar again */
- .bs-docs-sidebar.affix-bottom,
- .bs-docs-sidebar.affix {
- width: 263px;
- }
-}
-</style>
-<script type="text/javascript">
-$(function() {
- 'use strict';
-
- $('.bs-docs-sidebar li').first().addClass('active');
-
- $(document.body).scrollspy({target: '.bs-docs-sidebar'});
-
- $('.bs-docs-sidebar').affix();
-});
-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Macro filter storage compartment</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Case for 52mm <a href="https://en.wikipedia.org/wiki/Close-up_lens">macro filter</a>.
-</p>
-
-<ul class="org-ul">
-<li>Body:
-<ul class="org-ul">
-<li><img src="body.png" class="img-responsive" alt="body.png">
-</li>
-</ul>
-</li>
-
-<li>Cover:
-<ul class="org-ul">
-<li><img src="cover.png" class="img-responsive" alt="cover.png">
-</li>
-</ul>
-</li>
-</ul>
-
-
-<p>
-Download:
-</p>
-<table class="table table-striped table-bordered table-hover table-condensed">
-
-
-<colgroup>
-<col class="left">
-
-<col class="left">
-
-<col class="left">
-</colgroup>
-<thead>
-<tr>
-<th scope="col" class="text-left">item</th>
-<th scope="col" class="text-left">FreeCAD file</th>
-<th scope="col" class="text-left">STL file</th>
-</tr>
-</thead>
-<tbody>
-<tr>
-<td class="text-left">body</td>
-<td class="text-left"><a href="body.FCStd">download</a></td>
-<td class="text-left"><a href="body.stl">download</a></td>
-</tr>
-
-<tr>
-<td class="text-left">cover</td>
-<td class="text-left"><a href="cover.FCStd">download</a></td>
-<td class="text-left"><a href="cover.stl">download</a></td>
-</tr>
-</tbody>
-</table>
-
-<p>
-See also:
-</p>
-<ul class="org-ul">
-<li><a href="../Fujifilm%20camera%20battery%20box/index.html">Fujifilm camera battery box</a>
-</li>
-</ul>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-03-21 Sat 00:37</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Macro filter storage compartment
-#+author: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-[[file:make.png]]
-
-Case for 52mm [[https://en.wikipedia.org/wiki/Close-up_lens][macro filter]].
-
-+ Body:
- + [[file:body.png]]
-
-+ Cover:
- + [[file:cover.png]]
-
-
-Download:
-| item | FreeCAD file | STL file |
-|-------+--------------+----------|
-| body | [[file:body.FCStd][download]] | [[file:body.stl][download]] |
-| cover | [[file:cover.FCStd][download]] | [[file:cover.stl][download]] |
-
-See also:
-+ [[file:../Fujifilm%20camera%20battery%20box/index.html][Fujifilm camera battery box]]
+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>Case for microscope slides and cover slips.</title>
-<!-- 2020-03-21 Sat 00:38 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-<style type="text/css">
-footer {background-color: #111 !important;}
-pre {background-color: #111; color: #ccc;}
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-/* org mode styles on top of twbs */
-
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- position: relative;
- min-height: 100%;
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-
-body {
- font-size: 18px;
- margin-bottom: 105px;
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-
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- position: absolute;
- bottom: 0;
- width: 100%;
- height: 101px;
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- padding: 10px;
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- margin: 0 0 5px;
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-.bs-docs-sidebar .nav .nav {
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-.bs-docs-sidebar .nav .nav > .active > a,
-.bs-docs-sidebar .nav .nav > .active:hover > a,
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-.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
-.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
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-
-/* Show and affix the side nav when space allows it */
-@media (min-width: 992px) {
- .bs-docs-sidebar .nav > .active > ul {
- display: block;
- }
- /* Widen the fixed sidebar */
- .bs-docs-sidebar.affix,
- .bs-docs-sidebar.affix-bottom {
- width: 213px;
- }
- .bs-docs-sidebar.affix {
- position: fixed; /* Undo the static from mobile first approach */
- top: 20px;
- }
- .bs-docs-sidebar.affix-bottom {
- position: absolute; /* Undo the static from mobile first approach */
- }
- .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
- margin-top: 0;
- margin-bottom: 0
- }
-}
-@media (min-width: 1200px) {
- /* Widen the fixed sidebar again */
- .bs-docs-sidebar.affix-bottom,
- .bs-docs-sidebar.affix {
- width: 263px;
- }
-}
-</style>
-<script type="text/javascript">
-$(function() {
- 'use strict';
-
- $('.bs-docs-sidebar li').first().addClass('active');
-
- $(document.body).scrollspy({target: '.bs-docs-sidebar'});
-
- $('.bs-docs-sidebar').affix();
-});
-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Case for microscope slides and cover slips.</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Case for microscope slides and cover slips. Design utilizes <a href="https://www.amazon.de/gp/product/B00TACKU0O/">3mm x 2mm
-thick neodymium magnets</a>. Holes for magnets are made intentionally bit
-larger for magnets to easily fit in. You would need glue to fix
-magnets in holes.
-</p>
-
-<ul class="org-ul">
-<li>Can fit:
-<ul class="org-ul">
-<li>10x slides (25.5mm x 75.5mm x 1.5mm)
-</li>
-<li>10x cover slips: (20.5 x 20.5 x 0.5mm)
-</li>
-</ul>
-</li>
-
-<li>Parts:
-<ul class="org-ul">
-<li>Body:
-<ul class="org-ul">
-<li><img src="body.png" class="img-responsive" alt="body.png">
-</li>
-</ul>
-</li>
-
-<li>Cover:
-<ul class="org-ul">
-<li><img src="cover.png" class="img-responsive" alt="cover.png">
-</li>
-</ul>
-</li>
-</ul>
-</li>
-</ul>
-
-<p>
-Download:
-</p>
-<table class="table table-striped table-bordered table-hover table-condensed">
-
-
-<colgroup>
-<col class="left">
-
-<col class="left">
-
-<col class="left">
-</colgroup>
-<thead>
-<tr>
-<th scope="col" class="text-left">item</th>
-<th scope="col" class="text-left">FreeCAD file</th>
-<th scope="col" class="text-left">STL file</th>
-</tr>
-</thead>
-<tbody>
-<tr>
-<td class="text-left">body</td>
-<td class="text-left"><a href="body.FCStd">download</a></td>
-<td class="text-left"><a href="body.stl">download</a></td>
-</tr>
-
-<tr>
-<td class="text-left">cover</td>
-<td class="text-left"><a href="cover.FCStd">download</a></td>
-<td class="text-left"><a href="cover.stl">download</a></td>
-</tr>
-</tbody>
-</table>
-
-<p>
-See also:
-</p>
-<ul class="org-ul">
-<li><a href="../../optics/Fujifilm%20X-mount%20microscope%20adapter/">Fujifilm microscope adapter</a>
-</li>
-</ul>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-03-21 Sat 00:38</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Case for microscope slides and cover slips.
-#+author: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-[[file:make.png]]
-
-Case for microscope slides and cover slips. Design utilizes [[https://www.amazon.de/gp/product/B00TACKU0O/][3mm x 2mm
-thick neodymium magnets]]. Holes for magnets are made intentionally bit
-larger for magnets to easily fit in. You would need glue to fix
-magnets in holes.
-
-+ Can fit:
- + 10x slides (25.5mm x 75.5mm x 1.5mm)
- + 10x cover slips: (20.5 x 20.5 x 0.5mm)
-
-+ Parts:
- + Body:
- + [[file:body.png]]
-
- + Cover:
- + [[file:cover.png]]
-
-Download:
-| item | FreeCAD file | STL file |
-|-------+--------------+----------|
-| body | [[file:body.FCStd][download]] | [[file:body.stl][download]] |
-| cover | [[file:cover.FCStd][download]] | [[file:cover.stl][download]] |
-
-See also:
-+ [[file:../../optics/Fujifilm%20X-mount%20microscope%20adapter/][Fujifilm microscope adapter]]
+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>NanoVNA case</title>
-<!-- 2020-05-24 P 12:44 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-<style type="text/css">
-footer {background-color: #111 !important;}
-pre {background-color: #111; color: #ccc;}
-</style>
-<style type="text/css">
-/* org mode styles on top of twbs */
-
-html {
- position: relative;
- min-height: 100%;
-}
-
-body {
- font-size: 18px;
- margin-bottom: 105px;
-}
-
-footer {
- position: absolute;
- bottom: 0;
- width: 100%;
- height: 101px;
- background-color: #f5f5f5;
-}
-
-footer > div {
- padding: 10px;
-}
-
-footer p {
- margin: 0 0 5px;
- text-align: center;
- font-size: 16px;
-}
-
-#table-of-contents {
- margin-top: 20px;
- margin-bottom: 20px;
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-
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-
-.bs-docs-sidebar.affix {
- position: static;
-}
-@media (min-width: 768px) {
- .bs-docs-sidebar {
- padding-left: 20px;
- }
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-
-/* All levels of nav */
-.bs-docs-sidebar .nav > li > a {
- display: block;
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-.bs-docs-sidebar .nav .nav > li > a {
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-.bs-docs-sidebar .nav .nav > .active > a,
-.bs-docs-sidebar .nav .nav > .active:hover > a,
-.bs-docs-sidebar .nav .nav > .active:focus > a {
- padding-left: 28px;
- font-weight: 500;
-}
-
-/* Nav: third level (shown on .active) */
-.bs-docs-sidebar .nav .nav .nav {
- padding-bottom: 10px;
-}
-.bs-docs-sidebar .nav .nav .nav > li > a {
- padding-top: 1px;
- padding-bottom: 1px;
- padding-left: 40px;
- font-size: 12px;
- font-weight: normal;
-}
-.bs-docs-sidebar .nav .nav .nav > li > a:hover,
-.bs-docs-sidebar .nav .nav .nav > li > a:focus {
- padding-left: 39px;
-}
-.bs-docs-sidebar .nav .nav .nav > .active > a,
-.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
-.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
- padding-left: 38px;
- font-weight: 500;
-}
-
-/* Show and affix the side nav when space allows it */
-@media (min-width: 992px) {
- .bs-docs-sidebar .nav > .active > ul {
- display: block;
- }
- /* Widen the fixed sidebar */
- .bs-docs-sidebar.affix,
- .bs-docs-sidebar.affix-bottom {
- width: 213px;
- }
- .bs-docs-sidebar.affix {
- position: fixed; /* Undo the static from mobile first approach */
- top: 20px;
- }
- .bs-docs-sidebar.affix-bottom {
- position: absolute; /* Undo the static from mobile first approach */
- }
- .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
- margin-top: 0;
- margin-bottom: 0
- }
-}
-@media (min-width: 1200px) {
- /* Widen the fixed sidebar again */
- .bs-docs-sidebar.affix-bottom,
- .bs-docs-sidebar.affix {
- width: 263px;
- }
-}
-</style>
-<script type="text/javascript">
-$(function() {
- 'use strict';
-
- $('.bs-docs-sidebar li').first().addClass('active');
-
- $(document.body).scrollspy({target: '.bs-docs-sidebar'});
-
- $('.bs-docs-sidebar').affix();
-});
-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">NanoVNA case</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-<p>
-I felt that original NanoVNA case is too fragile for carrying this
-thing around in the bag. Also originally there is no housing for
-calibration and adapter connectors.
-</p>
-
-
-<figure>
-<p><img src="make,%201.png" class="img-responsive" alt="make,%201.png">
-</p>
-</figure>
-
-<p>
-This body/case provides better protection for device.
-</p>
-
-
-
-<figure>
-<p><img src="make,%202.png" class="img-responsive" alt="make,%202.png">
-</p>
-</figure>
-
-<p>
-While external case helps to carry this thing around in the bag, by
-covering touchscreen and housing calibration and adapter connectors.
-</p>
-
-
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Stylus / pincers help using touch screen and picking connectors from
-the box.
-</p>
-
-
-
-<figure>
-<p><img src="make,%204.png" class="img-responsive" alt="make,%204.png">
-</p>
-</figure>
-
-<p>
-Cover attaches to the body using <a href="https://www.amazon.de/gp/product/B00TACKU0O/">3mm x 2mm thick neodymium magnets</a>.
-</p>
-</div>
-</div>
-
-<div id="outline-container-sec-3" class="outline-2">
-<h2 id="sec-3"><span class="section-number-2">3</span> CAD renderings of assembled covers</h2>
-<div class="outline-text-2" id="text-3">
-<p>
-<img src="inner%20body%20assembled.png" class="img-responsive" alt="inner%20body%20assembled.png">
-CAD drawing for inner box/case.
-</p>
-
-<p>
-<img src="assembled.png" class="img-responsive" alt="assembled.png">
-CAD drawing for inner box/case within outer box.
-</p>
-</div>
-</div>
-<div id="outline-container-sec-4" class="outline-2">
-<h2 id="sec-4"><span class="section-number-2">4</span> Ready to print STL files</h2>
-<div class="outline-text-2" id="text-4">
-<hr >
-
-<p>
-<a href="inner%20box.stl">download: inner box</a>
-</p>
-
-<p>
-<img src="inner%20box,%201.png" class="img-responsive" alt="inner%20box,%201.png">
-<img src="inner%20box,%202.png" class="img-responsive" alt="inner%20box,%202.png">
-</p>
-
-<hr >
-
-<p>
-<a href="inner%20cover.stl">download: inner cover</a>
-<img src="inner%20cover.png" class="img-responsive" alt="inner%20cover.png">
-</p>
-
-<hr >
-
-<p>
-<a href="outer%20box.stl">download: outer box</a>
-<img src="outer%20box.png" class="img-responsive" alt="outer%20box.png">
-</p>
-
-<hr >
-
-<p>
-<a href="outer%20cover.stl">download: outer cover</a>
-<img src="outer%20cover.png" class="img-responsive" alt="outer%20cover.png">
-</p>
-
-<hr >
-
-<p>
-<a href="stylus.stl">download: stylus</a>
-<img src="stylus.png" class="img-responsive" alt="stylus.png">
-</p>
-</div>
-</div>
-
-<div id="outline-container-sec-5" class="outline-2">
-<h2 id="sec-5"><span class="section-number-2">5</span> CAD files</h2>
-<div class="outline-text-2" id="text-5">
-<p>
-Files can be edited using <a href="https://www.freecadweb.org/">FreeCAD</a>.
-</p>
-
-<ul class="org-ul">
-<li><a href="NanoVNA%20case.FCStd">NanoVNA case</a>
-</li>
-<li><a href="stylus.FCStd">Stylus</a>
-</li>
-</ul>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-<li><a href="#sec-3">3. CAD renderings of assembled covers</a></li>
-<li><a href="#sec-4">4. Ready to print STL files</a></li>
-<li><a href="#sec-5">5. CAD files</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-05-24 P 12:44</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: NanoVNA case
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-
-
-I felt that original NanoVNA case is too fragile for carrying this
-thing around in the bag. Also originally there is no housing for
-calibration and adapter connectors.
-
-[[file:make,%201.png]]
-
-This body/case provides better protection for device.
-
-
-[[file:make,%202.png]]
-
-While external case helps to carry this thing around in the bag, by
-covering touchscreen and housing calibration and adapter connectors.
-
-
-[[file:make.png]]
-
-Stylus / pincers help using touch screen and picking connectors from
-the box.
-
-
-[[file:make,%204.png]]
-
-Cover attaches to the body using [[https://www.amazon.de/gp/product/B00TACKU0O/][3mm x 2mm thick neodymium magnets]].
-
-* CAD renderings of assembled covers
-
-[[file:inner%20body%20assembled.png]]
-CAD drawing for inner box/case.
-
-[[file:assembled.png]]
-CAD drawing for inner box/case within outer box.
-* Ready to print STL files
-
------
-
-[[file:inner%20box.stl][download: inner box]]
-
-[[file:inner%20box,%201.png]]
-[[file:inner%20box,%202.png]]
-
------
-
-[[file:inner%20cover.stl][download: inner cover]]
-[[file:inner%20cover.png]]
-
------
-
-[[file:outer%20box.stl][download: outer box]]
-[[file:outer%20box.png]]
-
------
-
-[[file:outer%20cover.stl][download: outer cover]]
-[[file:outer%20cover.png]]
-
------
-
-[[file:stylus.stl][download: stylus]]
-[[file:stylus.png]]
-
-* CAD files
-Files can be edited using [[https://www.freecadweb.org/][FreeCAD]].
-
-+ [[file:NanoVNA%20case.FCStd][NanoVNA case]]
-+ [[file:stylus.FCStd][Stylus]]
+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>Book stand</title>
-<!-- 2020-05-02 Sat 22:48 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-<style type="text/css">
-footer {background-color: #111 !important;}
-pre {background-color: #111; color: #ccc;}
-</style>
-<style type="text/css">
-/* org mode styles on top of twbs */
-
-html {
- position: relative;
- min-height: 100%;
-}
-
-body {
- font-size: 18px;
- margin-bottom: 105px;
-}
-
-footer {
- position: absolute;
- bottom: 0;
- width: 100%;
- height: 101px;
- background-color: #f5f5f5;
-}
-
-footer > div {
- padding: 10px;
-}
-
-footer p {
- margin: 0 0 5px;
- text-align: center;
- font-size: 16px;
-}
-
-#table-of-contents {
- margin-top: 20px;
- margin-bottom: 20px;
-}
-
-blockquote p {
- font-size: 18px;
-}
-
-pre {
- font-size: 16px;
-}
-
-.footpara {
- display: inline-block;
-}
-
-figcaption {
- font-size: 16px;
- color: #666;
- font-style: italic;
- padding-bottom: 15px;
-}
-
-/* from twbs docs */
-
-.bs-docs-sidebar.affix {
- position: static;
-}
-@media (min-width: 768px) {
- .bs-docs-sidebar {
- padding-left: 20px;
- }
-}
-
-/* All levels of nav */
-.bs-docs-sidebar .nav > li > a {
- display: block;
- padding: 4px 20px;
- font-size: 14px;
- font-weight: 500;
- color: #999;
-}
-.bs-docs-sidebar .nav > li > a:hover,
-.bs-docs-sidebar .nav > li > a:focus {
- padding-left: 19px;
- color: #A1283B;
- text-decoration: none;
- background-color: transparent;
- border-left: 1px solid #A1283B;
-}
-.bs-docs-sidebar .nav > .active > a,
-.bs-docs-sidebar .nav > .active:hover > a,
-.bs-docs-sidebar .nav > .active:focus > a {
- padding-left: 18px;
- font-weight: bold;
- color: #A1283B;
- background-color: transparent;
- border-left: 2px solid #A1283B;
-}
-
-/* Nav: second level (shown on .active) */
-.bs-docs-sidebar .nav .nav {
- display: none; /* Hide by default, but at >768px, show it */
- padding-bottom: 10px;
-}
-.bs-docs-sidebar .nav .nav > li > a {
- padding-top: 1px;
- padding-bottom: 1px;
- padding-left: 30px;
- font-size: 12px;
- font-weight: normal;
-}
-.bs-docs-sidebar .nav .nav > li > a:hover,
-.bs-docs-sidebar .nav .nav > li > a:focus {
- padding-left: 29px;
-}
-.bs-docs-sidebar .nav .nav > .active > a,
-.bs-docs-sidebar .nav .nav > .active:hover > a,
-.bs-docs-sidebar .nav .nav > .active:focus > a {
- padding-left: 28px;
- font-weight: 500;
-}
-
-/* Nav: third level (shown on .active) */
-.bs-docs-sidebar .nav .nav .nav {
- padding-bottom: 10px;
-}
-.bs-docs-sidebar .nav .nav .nav > li > a {
- padding-top: 1px;
- padding-bottom: 1px;
- padding-left: 40px;
- font-size: 12px;
- font-weight: normal;
-}
-.bs-docs-sidebar .nav .nav .nav > li > a:hover,
-.bs-docs-sidebar .nav .nav .nav > li > a:focus {
- padding-left: 39px;
-}
-.bs-docs-sidebar .nav .nav .nav > .active > a,
-.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
-.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
- padding-left: 38px;
- font-weight: 500;
-}
-
-/* Show and affix the side nav when space allows it */
-@media (min-width: 992px) {
- .bs-docs-sidebar .nav > .active > ul {
- display: block;
- }
- /* Widen the fixed sidebar */
- .bs-docs-sidebar.affix,
- .bs-docs-sidebar.affix-bottom {
- width: 213px;
- }
- .bs-docs-sidebar.affix {
- position: fixed; /* Undo the static from mobile first approach */
- top: 20px;
- }
- .bs-docs-sidebar.affix-bottom {
- position: absolute; /* Undo the static from mobile first approach */
- }
- .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
- margin-top: 0;
- margin-bottom: 0
- }
-}
-@media (min-width: 1200px) {
- /* Widen the fixed sidebar again */
- .bs-docs-sidebar.affix-bottom,
- .bs-docs-sidebar.affix {
- width: 263px;
- }
-}
-</style>
-<script type="text/javascript">
-$(function() {
- 'use strict';
-
- $('.bs-docs-sidebar li').first().addClass('active');
-
- $(document.body).scrollspy({target: '.bs-docs-sidebar'});
-
- $('.bs-docs-sidebar').affix();
-});
-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Book stand</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Small book stand.
-</p>
-
-
-<figure>
-<p><img src="book%20stand.png" class="img-responsive" alt="book%20stand.png">
-</p>
-</figure>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="book%20stand.stl">STL file</a>
-</li>
-<li><a href="book%20stand.FCStd">FreeCAD file</a>
-</li>
-</ul>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-05-02 Sat 22:48</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Book stand
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-[[file:make.png]]
-
-Small book stand.
-
-[[file:book%20stand.png]]
-
-Download:
-+ [[file:book%20stand.stl][STL file]]
-+ [[file:book%20stand.FCStd][FreeCAD file]]
+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>Cable organizer</title>
-<!-- 2020-03-21 Sat 00:37 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-<style type="text/css">
-footer {background-color: #111 !important;}
-pre {background-color: #111; color: #ccc;}
-</style>
-<style type="text/css">
-/* org mode styles on top of twbs */
-
-html {
- position: relative;
- min-height: 100%;
-}
-
-body {
- font-size: 18px;
- margin-bottom: 105px;
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-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Cable organizer</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-I have lots of wires in my lab, and I need quick access to them. This
-organizer allows to conveniently hang them on the wall. I use double
-sided tape to make it stick.
-</p>
-
-
-<figure>
-<p><img src="body.png" class="img-responsive" alt="body.png">
-</p>
-</figure>
-</div>
-</div>
-
-<div id="outline-container-sec-3" class="outline-2">
-<h2 id="sec-3"><span class="section-number-2">3</span> Files</h2>
-<div class="outline-text-2" id="text-3">
-<p>
-You can <a href="body.FCStd">download FreeCAD project</a> file to tweak design or generated STL
-file ready for 3D printing:
-</p>
-
-<ul class="org-ul">
-<li><a href="body.stl">body.stl</a>
-</li>
-</ul>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-<li><a href="#sec-3">3. Files</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-03-21 Sat 00:37</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Cable organizer
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
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-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-[[file:make.png]]
-
-I have lots of wires in my lab, and I need quick access to them. This
-organizer allows to conveniently hang them on the wall. I use double
-sided tape to make it stick.
-
-[[file:body.png]]
-
-* Files
-You can [[file:body.FCStd][download FreeCAD project]] file to tweak design or generated STL
-file ready for 3D printing:
-
-+ [[file:body.stl]]
+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>Alpha Tools digital calipers mod and container box</title>
-<!-- 2020-03-21 Sat 00:37 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
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- padding: 10px;
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-/* from twbs docs */
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-@media (min-width: 768px) {
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- padding-left: 20px;
- }
-}
-
-/* All levels of nav */
-.bs-docs-sidebar .nav > li > a {
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- .bs-docs-sidebar .nav > .active > ul {
- display: block;
- }
- /* Widen the fixed sidebar */
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-<script type="text/javascript">
-$(function() {
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-
- $(document.body).scrollspy({target: '.bs-docs-sidebar'});
-
- $('.bs-docs-sidebar').affix();
-});
-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Alpha Tools digital calipers mod and container box</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-
-<figure>
-<p><img src="make,%203.png" class="img-responsive" alt="make,%203.png">
-</p>
-</figure>
-
-<p>
-As regular user of this tool, I got annoyed that original cell
-batteries run empty so fast and I have to worry about finding
-replacements.
-</p>
-
-
-<figure>
-<p><img src="make,%202.png" class="img-responsive" alt="make,%202.png">
-</p>
-</figure>
-
-<p>
-So I added AAA battery compartment to the bottom, and now I can use
-relatively large capacity and rechargeable NiMH batteries.
-</p>
-
-
-<figure>
-<p><img src="make,%201.png" class="img-responsive" alt="make,%201.png">
-</p>
-</figure>
-
-<p>
-The new problem I got is, how can I store and carry this thing
-around. So special case is designed.
-</p>
-
-
-<figure>
-<p><img src="box.png" class="img-responsive" alt="box.png">
-</p>
-</figure>
-
-<p>
-And special cover. Design utilizes <a href="https://www.amazon.de/gp/product/B00TACKU0O/">3mm x 2mm thick neodymium magnets</a>
-to keep cover magnetically attached to storage box.
-</p>
-
-
-<figure>
-<p><img src="cover.png" class="img-responsive" alt="cover.png">
-</p>
-</figure>
-
-<p>
-My printer can print only 120x120x120 mm objects. So only the most
-delicate part is protected. There is some empty space in the box
-because of geometry of the tool. It can be used as small storage
-compartments for something.
-</p>
-
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Closed box:
-<img src="make,%204.png" class="img-responsive" alt="make,%204.png">
-</p>
-</div>
-</div>
-
-<div id="outline-container-sec-3" class="outline-2">
-<h2 id="sec-3"><span class="section-number-2">3</span> Files</h2>
-<div class="outline-text-2" id="text-3">
-<p>
-You can <a href="box%20and%20cover.FCStd">download FreeCAD project</a> file to tweak design or generated STL
-files ready for 3D printing:
-</p>
-
-<ul class="org-ul">
-<li><a href="box.stl">box.stl</a>
-</li>
-<li><a href="cover.stl">cover.stl</a>
-</li>
-</ul>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-<li><a href="#sec-3">3. Files</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-03-21 Sat 00:37</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Alpha Tools digital calipers mod and container box
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-[[file:make,%203.png]]
-
-As regular user of this tool, I got annoyed that original cell
-batteries run empty so fast and I have to worry about finding
-replacements.
-
-[[file:make,%202.png]]
-
-So I added AAA battery compartment to the bottom, and now I can use
-relatively large capacity and rechargeable NiMH batteries.
-
-[[file:make,%201.png]]
-
-The new problem I got is, how can I store and carry this thing
-around. So special case is designed.
-
-[[file:box.png]]
-
-And special cover. Design utilizes [[https://www.amazon.de/gp/product/B00TACKU0O/][3mm x 2mm thick neodymium magnets]]
-to keep cover magnetically attached to storage box.
-
-[[file:cover.png]]
-
-My printer can print only 120x120x120 mm objects. So only the most
-delicate part is protected. There is some empty space in the box
-because of geometry of the tool. It can be used as small storage
-compartments for something.
-
-[[file:make.png]]
-
-Closed box:
-[[file:make,%204.png]]
-
-* Files
-You can [[file:box%20and%20cover.FCStd][download FreeCAD project]] file to tweak design or generated STL
-files ready for 3D printing:
-
-+ [[file:box.stl]]
-+ [[file:cover.stl]]
+++ /dev/null
-% Created 2020-02-29 L 00:34
-% Intended LaTeX compiler: pdflatex
-\documentclass[11pt]{article}
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-\author{Svjatoslav Agejenko}
-\date{\today}
-\title{Alpha Tools digital calipers mod and container box}
-\hypersetup{
- pdfauthor={Svjatoslav Agejenko},
- pdftitle={Alpha Tools digital calipers mod and container box},
- pdfkeywords={},
- pdfsubject={},
- pdfcreator={Emacs 26.1 (Org mode 9.1.9)},
- pdflang={English}}
-\begin{document}
-
-\maketitle
-\tableofcontents
-
-
-\section{General}
-\label{sec:orgcf86045}
-\begin{itemize}
-\item DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-
-\item Author:
-\begin{itemize}
-\item Svjatoslav Agejenko
-\item Homepage: \url{https://svjatoslav.eu}
-\item Email: \href{mailto://svjatoslav@svjatoslav.eu}{svjatoslav@svjatoslav.eu}
-\end{itemize}
-
-\item See also:
-\begin{itemize}
-\item \href{../../index.html}{Other physical projects in this repository}
-\item \href{https://www.svjatoslav.eu/projects/}{Other projects hosted at svjatoslav.eu}
-\end{itemize}
-\end{itemize}
-
-\section{Project description}
-\label{sec:org74ad9cd}
-\begin{center}
-\includegraphics[width=.9\linewidth]{make,%201.png}
-\end{center}
-
-As regular user of this tool, I got annoyed that cell battery run
-empty so fast and I have to worry about finding replacements. So I
-added AAA battery compartment to the bottom, and now I can use
-relatively large capacity and rechargeable NiMH batteries.
-
-The new problem I got is, how can I store and carry this thing
-around. So special case is designed.
-
-\begin{center}
-\includegraphics[width=.9\linewidth]{make.png}
-\end{center}
-
-Design utilizes \href{https://www.amazon.de/gp/product/B00TACKU0O/}{3mm x 2mm thick neodymium magnets}.
-\section{Files}
-\label{sec:org42557cd}
-You can \href{body\%20and\%20cover.FCStd}{download FreeCAD project} file to tweak design or generated STL
-files ready for 3D printing:
-
-\begin{itemize}
-\item Body: \href{body.stl}{download STL}
-\begin{itemize}
-\item \begin{center}
-\includegraphics[width=.9\linewidth]{body.png}
-\end{center}
-\end{itemize}
-
-\item Cover: \href{cover.stl}{download STL}
-\begin{itemize}
-\item \begin{center}
-\includegraphics[width=.9\linewidth]{cover.png}
-\end{center}
-\end{itemize}
-\end{itemize}
-\end{document}
+++ /dev/null
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-<title>27mm and 55mm rolls</title>
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-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
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-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
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-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">27mm and 55mm rolls</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-I am a big fan of <a href="https://www.thingiverse.com/thing:2471753">stackable bins organizer</a>. I find 2x2 bins with 21mm
-height are particularly good for storing rolls of wire. Also electric
-handheld screwdriver is good for twisting wire onto the
-roll. Therefore I designed rolls that have standard hexagonal hole on
-the bottom (for screwdriver compatibility):
-</p>
-
-
-<figure>
-<p><img src="roll%2027mm,%20body,%202.png" class="img-responsive" alt="roll%2027mm,%20body,%202.png">
-</p>
-</figure>
-
-<p>
-and 20mm total roll height, to be used with stackable bins
-organizer. Rolls are made from body and cover:
-</p>
-
-<ul class="org-ul">
-<li>Body:
-<ul class="org-ul">
-<li><img src="roll%2027mm,%20body.png" class="img-responsive" alt="roll%2027mm,%20body.png">
-</li>
-</ul>
-</li>
-
-<li>Cover:
-<ul class="org-ul">
-<li><img src="roll%2027mm,%20cover.png" class="img-responsive" alt="roll%2027mm,%20cover.png">
-</li>
-</ul>
-</li>
-</ul>
-
-<p>
-After printing, both parts have to be glued together. This is to avoid
-overhangs that are hard to print.
-</p>
-</div>
-</div>
-
-<div id="outline-container-sec-3" class="outline-2">
-<h2 id="sec-3"><span class="section-number-2">3</span> 27mm diameter roll</h2>
-<div class="outline-text-2" id="text-3">
-
-<figure>
-<p><img src="roll%2027mm,%20assembled.png" class="img-responsive" alt="roll%2027mm,%20assembled.png">
-</p>
-</figure>
-
-
-<figure>
-<p><img src="roll%2027mm,%20assembled,%202.png" class="img-responsive" alt="roll%2027mm,%20assembled,%202.png">
-</p>
-</figure>
-
-<ul class="org-ul">
-<li><a href="roll%2027mm,%20body.stl">body STL</a>
-</li>
-<li><a href="roll%2027mm,%20cover.stl">cover STL</a>
-</li>
-<li><a href="roll%2027mm.FCStd">FreeCAD file</a>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-4" class="outline-2">
-<h2 id="sec-4"><span class="section-number-2">4</span> 55mm diameter roll</h2>
-<div class="outline-text-2" id="text-4">
-
-<figure>
-<p><img src="roll%2055mm,%20assembled.png" class="img-responsive" alt="roll%2055mm,%20assembled.png">
-</p>
-</figure>
-
-<ul class="org-ul">
-<li><a href="roll%2055mm,%20body.stl">body STL</a>
-</li>
-<li><a href="roll%2055mm,%20cover.stl">cover STL</a>
-</li>
-<li><a href="roll%2055mm.FCStd">FreeCAD file</a>
-</li>
-</ul>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-<li><a href="#sec-3">3. 27mm diameter roll</a></li>
-<li><a href="#sec-4">4. 55mm diameter roll</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-04-30 N 19:05</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: 27mm and 55mm rolls
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
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-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-[[file:make.png]]
-
-I am a big fan of [[https://www.thingiverse.com/thing:2471753][stackable bins organizer]]. I find 2x2 bins with 21mm
-height are particularly good for storing rolls of wire. Also electric
-handheld screwdriver is good for twisting wire onto the
-roll. Therefore I designed rolls that have standard hexagonal hole on
-the bottom (for screwdriver compatibility):
-
-[[file:roll%2027mm,%20body,%202.png]]
-
-and 20mm total roll height, to be used with stackable bins
-organizer. Rolls are made from body and cover:
-
-- Body:
- - [[file:roll%2027mm,%20body.png]]
-
-- Cover:
- - [[file:roll%2027mm,%20cover.png]]
-
-After printing, both parts have to be glued together. This is to avoid
-overhangs that are hard to print.
-
-* 27mm diameter roll
-
-[[file:roll%2027mm,%20assembled.png]]
-
-[[file:roll%2027mm,%20assembled,%202.png]]
-
-- [[file:roll%2027mm,%20body.stl][body STL]]
-- [[file:roll%2027mm,%20cover.stl][cover STL]]
-- [[file:roll%2027mm.FCStd][FreeCAD file]]
-
-* 55mm diameter roll
-
-[[file:roll%2055mm,%20assembled.png]]
-
-- [[file:roll%2055mm,%20body.stl][body STL]]
-- [[file:roll%2055mm,%20cover.stl][cover STL]]
-- [[file:roll%2055mm.FCStd][FreeCAD file]]
+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>Tiny wall shelf</title>
-<!-- 2020-03-29 P 12:06 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
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-});
-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Tiny wall shelf</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-My current printer does at most 120x120x120 (mm) prints. And I needed
-a small wall shelf for my lab. Here comes design for 119x119x119 (just
-in case). I used double sided tape for wall attachment.
-</p>
-
-
-<figure>
-<p><img src="shelf.png" class="img-responsive" alt="shelf.png">
-</p>
-</figure>
-
-<ul class="org-ul">
-<li>Download:
-<ul class="org-ul">
-<li><a href="shelf.stl">Printable STL file.</a>
-</li>
-<li><a href="shelf.FCStd">Editable FreeCAD file.</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-03-29 P 12:06</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Tiny wall shelf
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-[[file:make.png]]
-
-My current printer does at most 120x120x120 (mm) prints. And I needed
-a small wall shelf for my lab. Here comes design for 119x119x119 (just
-in case). I used double sided tape for wall attachment.
-
-[[file:shelf.png]]
-
-- Download:
- - [[file:shelf.stl][Printable STL file.]]
- - [[file:shelf.FCStd][Editable FreeCAD file.]]
+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>Window holder</title>
-<!-- 2020-06-22 Mon 20:54 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-<style type="text/css">
-footer {background-color: #111 !important;}
-pre {background-color: #111; color: #ccc;}
-</style>
-<style type="text/css">
-/* org mode styles on top of twbs */
-
-html {
- position: relative;
- min-height: 100%;
-}
-
-body {
- font-size: 18px;
- margin-bottom: 105px;
-}
-
-footer {
- position: absolute;
- bottom: 0;
- width: 100%;
- height: 101px;
- background-color: #f5f5f5;
-}
-
-footer > div {
- padding: 10px;
-}
-
-footer p {
- margin: 0 0 5px;
- text-align: center;
- font-size: 16px;
-}
-
-#table-of-contents {
- margin-top: 20px;
- margin-bottom: 20px;
-}
-
-blockquote p {
- font-size: 18px;
-}
-
-pre {
- font-size: 16px;
-}
-
-.footpara {
- display: inline-block;
-}
-
-figcaption {
- font-size: 16px;
- color: #666;
- font-style: italic;
- padding-bottom: 15px;
-}
-
-/* from twbs docs */
-
-.bs-docs-sidebar.affix {
- position: static;
-}
-@media (min-width: 768px) {
- .bs-docs-sidebar {
- padding-left: 20px;
- }
-}
-
-/* All levels of nav */
-.bs-docs-sidebar .nav > li > a {
- display: block;
- padding: 4px 20px;
- font-size: 14px;
- font-weight: 500;
- color: #999;
-}
-.bs-docs-sidebar .nav > li > a:hover,
-.bs-docs-sidebar .nav > li > a:focus {
- padding-left: 19px;
- color: #A1283B;
- text-decoration: none;
- background-color: transparent;
- border-left: 1px solid #A1283B;
-}
-.bs-docs-sidebar .nav > .active > a,
-.bs-docs-sidebar .nav > .active:hover > a,
-.bs-docs-sidebar .nav > .active:focus > a {
- padding-left: 18px;
- font-weight: bold;
- color: #A1283B;
- background-color: transparent;
- border-left: 2px solid #A1283B;
-}
-
-/* Nav: second level (shown on .active) */
-.bs-docs-sidebar .nav .nav {
- display: none; /* Hide by default, but at >768px, show it */
- padding-bottom: 10px;
-}
-.bs-docs-sidebar .nav .nav > li > a {
- padding-top: 1px;
- padding-bottom: 1px;
- padding-left: 30px;
- font-size: 12px;
- font-weight: normal;
-}
-.bs-docs-sidebar .nav .nav > li > a:hover,
-.bs-docs-sidebar .nav .nav > li > a:focus {
- padding-left: 29px;
-}
-.bs-docs-sidebar .nav .nav > .active > a,
-.bs-docs-sidebar .nav .nav > .active:hover > a,
-.bs-docs-sidebar .nav .nav > .active:focus > a {
- padding-left: 28px;
- font-weight: 500;
-}
-
-/* Nav: third level (shown on .active) */
-.bs-docs-sidebar .nav .nav .nav {
- padding-bottom: 10px;
-}
-.bs-docs-sidebar .nav .nav .nav > li > a {
- padding-top: 1px;
- padding-bottom: 1px;
- padding-left: 40px;
- font-size: 12px;
- font-weight: normal;
-}
-.bs-docs-sidebar .nav .nav .nav > li > a:hover,
-.bs-docs-sidebar .nav .nav .nav > li > a:focus {
- padding-left: 39px;
-}
-.bs-docs-sidebar .nav .nav .nav > .active > a,
-.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
-.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
- padding-left: 38px;
- font-weight: 500;
-}
-
-/* Show and affix the side nav when space allows it */
-@media (min-width: 992px) {
- .bs-docs-sidebar .nav > .active > ul {
- display: block;
- }
- /* Widen the fixed sidebar */
- .bs-docs-sidebar.affix,
- .bs-docs-sidebar.affix-bottom {
- width: 213px;
- }
- .bs-docs-sidebar.affix {
- position: fixed; /* Undo the static from mobile first approach */
- top: 20px;
- }
- .bs-docs-sidebar.affix-bottom {
- position: absolute; /* Undo the static from mobile first approach */
- }
- .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
- margin-top: 0;
- margin-bottom: 0
- }
-}
-@media (min-width: 1200px) {
- /* Widen the fixed sidebar again */
- .bs-docs-sidebar.affix-bottom,
- .bs-docs-sidebar.affix {
- width: 263px;
- }
-}
-</style>
-<script type="text/javascript">
-$(function() {
- 'use strict';
-
- $('.bs-docs-sidebar li').first().addClass('active');
-
- $(document.body).scrollspy({target: '.bs-docs-sidebar'});
-
- $('.bs-docs-sidebar').affix();
-});
-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Window holder</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Authors:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-<ul class="org-ul">
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>Valeria Agejenko
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Keeps window open so that strong wind will not slam it close.
-</p>
-
-
-<figure>
-<p><img src="schematic.png" class="img-responsive" alt="schematic.png">
-</p>
-</figure>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="window%20fixator.stl">STL file</a>
-</li>
-<li><a href="window%20fixator.FCStd">FreeCAD file</a>
-</li>
-</ul>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-06-22 Mon 20:54</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Window holder
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Authors:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
- - Valeria Agejenko
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-[[file:make.png]]
-
-Keeps window open so that strong wind will not slam it close.
-
-[[file:schematic.png]]
-
-Download:
-+ [[file:window%20fixator.stl][STL file]]
-+ [[file:window%20fixator.FCStd][FreeCAD file]]
+++ /dev/null
-EESchema Schematic File Version 4
-EELAYER 30 0
-EELAYER END
-$Descr A4 11693 8268
-encoding utf-8
-Sheet 6 6
-Title ""
-Date ""
-Rev ""
-Comp ""
-Comment1 ""
-Comment2 ""
-Comment3 ""
-Comment4 ""
-$EndDescr
-Text HLabel 3900 3350 0 50 Input ~ 0
-V_in
-Text HLabel 4450 3350 2 50 Input ~ 0
-V_out
-Text HLabel 4150 3650 0 50 BiDi ~ 0
-GND
-$EndSCHEMATC
+++ /dev/null
-EESchema Schematic File Version 4
-EELAYER 30 0
-EELAYER END
-$Descr A4 11693 8268
-encoding utf-8
-Sheet 6 6
-Title ""
-Date ""
-Rev ""
-Comp ""
-Comment1 ""
-Comment2 ""
-Comment3 ""
-Comment4 ""
-$EndDescr
-Text HLabel 3900 3350 0 50 Input ~ 0
-V_in
-Text HLabel 4450 3350 2 50 Input ~ 0
-V_out
-Text HLabel 4150 3650 0 50 BiDi ~ 0
-GND
-$EndSCHEMATC
+++ /dev/null
-EESchema-LIBRARY Version 2.4
-#encoding utf-8
-#
-# Connector_Conn_WallPlug
-#
-DEF Connector_Conn_WallPlug P 0 0 Y Y 1 F N
-F0 "P" -50 175 50 H V C BNN
-F1 "Connector_Conn_WallPlug" -225 0 50 V V C BNN
-F2 "" 400 0 50 H I C CNN
-F3 "" 400 0 50 H I C CNN
-DRAW
-A -125 0 150 -899 899 0 1 10 f -125 -150 -125 150
-P 2 0 1 20 -175 -100 -25 -100 N
-P 2 0 1 20 -175 100 -25 100 N
-P 2 0 1 10 -125 -150 -125 150 N
-P 2 0 1 0 -25 -100 100 -100 N
-P 2 0 1 0 -25 100 100 100 N
-X AC_P 1 200 100 200 L 50 50 1 1 w
-X AC_N 2 200 -100 200 L 50 50 1 1 w
-ENDDRAW
-ENDDEF
-#
-# Connector_USB_A
-#
-DEF Connector_USB_A J 0 40 Y Y 1 F N
-F0 "J" -200 450 50 H V L CNN
-F1 "Connector_USB_A" -200 350 50 H V L CNN
-F2 "" 150 -50 50 H I C CNN
-F3 "" 150 -50 50 H I C CNN
-$FPLIST
- USB*
-$ENDFPLIST
-DRAW
-C -150 85 25 0 1 10 F
-C -25 135 15 0 1 10 F
-S -200 -300 200 300 0 1 10 f
-S -60 190 -170 210 0 1 0 F
-S -50 180 -180 230 0 1 0 N
-S -5 -300 5 -270 0 1 0 N
-S 10 50 -20 20 0 1 10 F
-S 200 -105 170 -95 0 1 0 N
-S 200 -5 170 5 0 1 0 N
-S 200 195 170 205 0 1 0 N
-P 4 0 1 10 -125 85 -100 85 -50 135 -25 135 N
-P 4 0 1 10 -100 85 -75 85 -50 35 0 35 N
-P 4 0 1 10 25 110 25 60 75 85 25 110 F
-P 2 1 1 10 -75 85 25 85 N
-X VBUS 1 300 200 100 L 50 50 1 1 W
-X D- 2 300 -100 100 L 50 50 1 1 P
-X D+ 3 300 0 100 L 50 50 1 1 P
-X GND 4 0 -400 100 U 50 50 1 1 W
-X Shield 5 -100 -400 100 U 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-# Device_C
-#
-DEF Device_C C 0 10 N Y 1 F N
-F0 "C" 25 100 50 H V L CNN
-F1 "Device_C" 25 -100 50 H V L CNN
-F2 "" 38 -150 50 H I C CNN
-F3 "" 0 0 50 H I C CNN
-$FPLIST
- C_*
-$ENDFPLIST
-DRAW
-P 2 0 1 20 -80 -30 80 -30 N
-P 2 0 1 20 -80 30 80 30 N
-X ~ 1 0 150 110 D 50 50 1 1 P
-X ~ 2 0 -150 110 U 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-# Device_D_Bridge_+-AA
-#
-DEF Device_D_Bridge_+-AA D 0 0 Y Y 1 F N
-F0 "D" 100 275 50 H V L CNN
-F1 "Device_D_Bridge_+-AA" 100 200 50 H V L CNN
-F2 "" 0 0 50 H I C CNN
-F3 "" 0 0 50 H I C CNN
-$FPLIST
- D*Bridge*
- D*Rectifier*
-$ENDFPLIST
-DRAW
-C -200 0 10 0 1 0 F
-C 0 -200 10 0 1 0 F
-C 0 200 10 0 1 0 F
-C 200 0 10 0 1 0 F
-P 2 0 1 10 -100 150 -50 100 N
-P 2 0 1 10 -50 -100 -100 -150 N
-P 2 0 1 10 100 -50 150 -100 N
-P 2 0 1 10 100 50 150 100 N
-P 4 0 1 10 -150 100 -100 50 -75 125 -150 100 N
-P 4 0 1 10 -100 -50 -150 -100 -75 -125 -100 -50 N
-P 4 0 1 10 50 100 100 150 125 75 50 100 N
-P 4 0 1 10 125 -75 50 -100 100 -150 125 -75 N
-P 5 0 1 0 -200 0 0 -200 200 0 0 200 -200 0 N
-X + 1 300 0 100 L 50 50 1 1 P
-X - 2 -300 0 100 R 50 50 1 1 P
-X ~~ 3 0 300 100 D 50 50 1 1 P
-X ~~ 4 0 -300 100 U 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-# Device_R
-#
-DEF Device_R R 0 0 N Y 1 F N
-F0 "R" 80 0 50 V V C CNN
-F1 "Device_R" 0 0 50 V V C CNN
-F2 "" -70 0 50 V I C CNN
-F3 "" 0 0 50 H I C CNN
-$FPLIST
- R_*
-$ENDFPLIST
-DRAW
-S -40 -100 40 100 0 1 10 N
-X ~ 1 0 150 50 D 50 50 1 1 P
-X ~ 2 0 -150 50 U 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-# Device_Transformer_1P_1S
-#
-DEF Device_Transformer_1P_1S T 0 40 Y N 1 F N
-F0 "T" 0 250 50 H V C CNN
-F1 "Device_Transformer_1P_1S" 0 -300 50 H V C CNN
-F2 "" 0 0 50 H I C CNN
-F3 "" 0 0 50 H I C CNN
-DRAW
-A -100 -150 50 899 1 0 1 0 N -100 -100 -50 -150
-A -100 -150 50 -1 -899 0 1 0 N -50 -150 -100 -199
-A -100 -50 50 899 1 0 1 0 N -100 0 -50 -50
-A -100 -50 50 -1 -899 0 1 0 N -50 -50 -100 -99
-A -100 50 50 899 1 0 1 0 N -100 100 -50 50
-A -100 50 50 -1 -899 0 1 0 N -50 50 -100 1
-A -100 150 50 899 1 0 1 0 N -100 200 -50 150
-A -100 150 50 -1 -899 0 1 0 N -50 150 -100 101
-A 100 -50 50 899 -1799 0 1 0 N 100 0 51 -50
-A 100 -50 50 1799 -899 0 1 0 N 51 -50 100 -99
-A 100 50 50 899 -1799 0 1 0 N 100 100 51 50
-A 100 50 50 1799 -899 0 1 0 N 51 50 100 1
-A 100 150 50 899 -1799 0 1 0 N 100 200 51 150
-A 100 150 50 1799 -899 0 1 0 N 51 150 100 101
-A 101 -150 50 910 -1799 0 1 0 N 101 -100 52 -150
-A 101 -150 50 -912 -1799 0 1 0 N 101 -199 52 -150
-P 2 0 1 0 -25 200 -25 -200 N
-P 2 0 1 0 25 -200 25 200 N
-X AA 1 -400 200 300 R 50 50 1 1 P
-X AB 2 -400 -200 300 R 50 50 1 1 P
-X SA 3 400 -200 300 L 50 50 1 1 P
-X SB 4 400 200 300 L 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-# Device_Voltmeter_DC
-#
-DEF Device_Voltmeter_DC MES 0 1 N N 1 F N
-F0 "MES" -130 40 50 H V R CNN
-F1 "Device_Voltmeter_DC" -130 -30 50 H V R CNN
-F2 "" 0 100 50 V I C CNN
-F3 "" 0 100 50 V I C CNN
-DRAW
-C 0 0 100 0 1 10 N
-T 0 0 0 100 0 0 0 V Normal 0 C C
-P 2 0 0 0 -125 -125 -75 -75 N
-P 2 0 0 0 75 75 125 125 N
-P 3 0 0 0 75 125 125 125 125 75 N
-P 2 0 1 0 10 150 30 150 N
-P 2 0 1 0 20 160 20 140 N
-X - 1 0 -200 100 U 50 50 1 1 P
-X + 2 0 200 100 D 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-# Regulator_Linear_LM317_3PinPackage
-#
-DEF Regulator_Linear_LM317_3PinPackage U 0 10 Y Y 1 F N
-F0 "U" -150 125 50 H V C CNN
-F1 "Regulator_Linear_LM317_3PinPackage" 0 125 50 H V L CNN
-F2 "" 0 250 50 H I C CIN
-F3 "" 0 0 50 H I C CNN
-ALIAS AZ1117-ADJ
-$FPLIST
- SOT?223*
- SOT?89*
- TO?220*
- TO?252*
- TO?263*
-$ENDFPLIST
-DRAW
-S -200 75 200 -200 0 1 10 f
-X ADJ 1 0 -300 100 U 50 50 1 1 I
-X VO 2 300 0 100 L 50 50 1 1 w
-X VI 3 -300 0 100 R 50 50 1 1 W
-ENDDRAW
-ENDDEF
-#
-# Switch_SW_DPST
-#
-DEF Switch_SW_DPST SW 0 0 Y N 1 F N
-F0 "SW" 0 200 50 H V C CNN
-F1 "Switch_SW_DPST" 0 -200 50 H V C CNN
-F2 "" 0 0 50 H I C CNN
-F3 "" 0 0 50 H I C CNN
-DRAW
-C -80 -100 20 0 0 0 N
-C -80 100 20 0 0 0 N
-C 80 -100 20 0 0 0 N
-C 80 100 20 0 0 0 N
-P 2 0 0 0 -60 -90 50 -40 N
-P 2 0 0 0 -60 110 50 160 N
-P 2 0 0 0 0 -50 0 -25 N
-P 2 0 0 0 0 0 0 25 N
-P 2 0 0 0 0 50 0 75 N
-P 2 0 0 0 0 100 0 125 N
-X 1 1 -200 -100 100 R 50 50 1 1 P
-X 2 2 200 -100 100 L 50 50 1 1 P
-X 3 3 -200 100 100 R 50 50 1 1 P
-X 4 4 200 100 100 L 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-# power_GND
-#
-DEF power_GND #PWR 0 0 Y Y 1 F P
-F0 "#PWR" 0 -250 50 H I C CNN
-F1 "power_GND" 0 -150 50 H V C CNN
-F2 "" 0 0 50 H I C CNN
-F3 "" 0 0 50 H I C CNN
-DRAW
-P 6 0 1 0 0 0 0 -50 50 -50 0 -100 -50 -50 0 -50 N
-X GND 1 0 0 0 D 50 50 1 1 W N
-ENDDRAW
-ENDDEF
-#
-#End Library
+++ /dev/null
-(kicad_pcb (version 4) (host kicad "dummy file") )
+++ /dev/null
-update=22/05/2015 07:44:53
-version=1
-last_client=kicad
-[general]
-version=1
-RootSch=
-BoardNm=
-[pcbnew]
-version=1
-LastNetListRead=
-UseCmpFile=1
-PadDrill=0.600000000000
-PadDrillOvalY=0.600000000000
-PadSizeH=1.500000000000
-PadSizeV=1.500000000000
-PcbTextSizeV=1.500000000000
-PcbTextSizeH=1.500000000000
-PcbTextThickness=0.300000000000
-ModuleTextSizeV=1.000000000000
-ModuleTextSizeH=1.000000000000
-ModuleTextSizeThickness=0.150000000000
-SolderMaskClearance=0.000000000000
-SolderMaskMinWidth=0.000000000000
-DrawSegmentWidth=0.200000000000
-BoardOutlineThickness=0.100000000000
-ModuleOutlineThickness=0.150000000000
-[cvpcb]
-version=1
-NetIExt=net
-[eeschema]
-version=1
-LibDir=
-[eeschema/libraries]
+++ /dev/null
-EESchema Schematic File Version 4
-EELAYER 30 0
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-$Descr A4 11693 8268
-encoding utf-8
-Sheet 1 6
-Title ""
-Date ""
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-Comp ""
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-Comment3 ""
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-$EndDescr
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-F2 "220V_in1" I L 4300 2800 50
-F3 "220V_in2" I L 4300 3000 50
-F4 "pwr_switch_1" B R 5350 2800 50
-F5 "pwr_switch_2" B R 5350 3000 50
-F6 "+30V" O R 5350 3200 50
-F7 "GND" O R 5350 3400 50
-$EndSheet
-$Comp
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-P 3800 2900
-F 0 "P1" H 3817 3225 50 0000 C CNN
-F 1 "Conn_WallPlug" H 3817 3134 50 0000 C CNN
-F 2 "" H 4200 2900 50 0001 C CNN
-F 3 "~" H 4200 2900 50 0001 C CNN
- 1 3800 2900
- 1 0 0 -1
-$EndComp
-$Comp
-L power:GND #PWR01
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-P 5450 3500
-F 0 "#PWR01" H 5450 3250 50 0001 C CNN
-F 1 "GND" H 5455 3327 50 0000 C CNN
-F 2 "" H 5450 3500 50 0001 C CNN
-F 3 "" H 5450 3500 50 0001 C CNN
- 1 5450 3500
- 1 0 0 -1
-$EndComp
-Wire Wire Line
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-Wire Wire Line
- 5450 3400 5350 3400
-Wire Wire Line
- 4000 2800 4300 2800
-Wire Wire Line
- 4000 3000 4300 3000
-$Comp
-L Switch:SW_DPST SW1
-U 1 1 5F0BC431
-P 6200 2200
-F 0 "SW1" H 6200 2525 50 0000 C CNN
-F 1 "SW_DPST" H 6200 2434 50 0000 C CNN
-F 2 "" H 6200 2200 50 0001 C CNN
-F 3 "~" H 6200 2200 50 0001 C CNN
- 1 6200 2200
- 1 0 0 -1
-$EndComp
-$Sheet
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-F0 "current limiter" 50
-F1 "current limiter.sch" 50
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-F3 "V_out" O R 7800 3200 50
-$EndSheet
-$Sheet
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-U 5F0C4B8D
-F0 "DC2DC step down" 50
-F1 "DC2DC step down.sch" 50
-F2 "V_in" I L 5900 3200 50
-F3 "V_out" I R 6500 3200 50
-F4 "GND" B L 5900 3350 50
-$EndSheet
-Wire Wire Line
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-Wire Wire Line
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-Wire Wire Line
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-Wire Wire Line
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-Wire Wire Line
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-Wire Wire Line
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-$Sheet
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-U 5F0CC4B7
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-F1 "connector terminal.sch" 50
-F2 "5V" I L 8950 3150 50
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-F4 "GND" I L 8950 3450 50
-F5 "Battery" B L 8950 3600 50
-$EndSheet
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-Wire Wire Line
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-Wire Wire Line
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-Wire Wire Line
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-Connection ~ 8300 3300
-Wire Wire Line
- 8300 3300 8300 3700
-$Comp
-L power:GND #PWR019
-U 1 1 5F170709
-P 8800 3700
-F 0 "#PWR019" H 8800 3450 50 0001 C CNN
-F 1 "GND" H 8805 3527 50 0000 C CNN
-F 2 "" H 8800 3700 50 0001 C CNN
-F 3 "" H 8800 3700 50 0001 C CNN
- 1 8800 3700
- 1 0 0 -1
-$EndComp
-Wire Wire Line
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-Wire Wire Line
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-Wire Wire Line
- 8800 3450 8950 3450
-Wire Wire Line
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-Wire Wire Line
- 5850 2100 5850 1750
-Connection ~ 8300 3200
-$Comp
-L Device:Voltmeter_DC MES1
-U 1 1 5F175320
-P 8300 4600
-F 0 "MES1" H 8453 4646 50 0000 L CNN
-F 1 "Voltmeter_DC" H 8453 4555 50 0000 L CNN
-F 2 "" V 8300 4700 50 0001 C CNN
-F 3 "~" V 8300 4700 50 0001 C CNN
- 1 8300 4600
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:Voltmeter_DC MES2
-U 1 1 5F1764EC
-P 9200 4650
-F 0 "MES2" H 9353 4696 50 0000 L CNN
-F 1 "Voltmeter_DC" H 9353 4605 50 0000 L CNN
-F 2 "" V 9200 4750 50 0001 C CNN
-F 3 "~" V 9200 4750 50 0001 C CNN
- 1 9200 4650
- 1 0 0 -1
-$EndComp
-Wire Wire Line
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-Wire Wire Line
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-Connection ~ 8300 3700
-Wire Wire Line
- 8650 4150 9200 4150
-Wire Wire Line
- 9200 4150 9200 4450
-Connection ~ 8650 4150
-$Sheet
-S 7200 4050 600 350
-U 5F182C5C
-F0 "sheet5F182C5C" 50
-F1 "DC2DC step down.sch" 50
-F2 "V_in" I L 7200 4150 50
-F3 "V_out" I R 7800 4150 50
-F4 "GND" B L 7200 4300 50
-$EndSheet
-$Comp
-L power:GND #PWR022
-U 1 1 5F1843C4
-P 7050 4400
-F 0 "#PWR022" H 7050 4150 50 0001 C CNN
-F 1 "GND" H 7055 4227 50 0000 C CNN
-F 2 "" H 7050 4400 50 0001 C CNN
-F 3 "" H 7050 4400 50 0001 C CNN
- 1 7050 4400
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 7050 4400 7050 4300
-Wire Wire Line
- 7050 4300 7200 4300
-$Comp
-L power:GND #PWR021
-U 1 1 5F184BC7
-P 5750 3450
-F 0 "#PWR021" H 5750 3200 50 0001 C CNN
-F 1 "GND" H 5755 3277 50 0000 C CNN
-F 2 "" H 5750 3450 50 0001 C CNN
-F 3 "" H 5750 3450 50 0001 C CNN
- 1 5750 3450
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 5750 3450 5750 3350
-Wire Wire Line
- 5750 3350 5900 3350
-Text Label 7100 3200 0 50 ~ 0
-5
-Text Label 7850 3200 0 50 ~ 0
-6
-Text Label 5400 3400 0 50 ~ 0
-1
-Text Label 5400 3200 0 50 ~ 0
-2
-Text Label 5900 2100 0 50 ~ 0
-3
-Text Label 6500 2100 0 50 ~ 0
-4
-Text Label 8850 3600 0 50 ~ 0
-7
-Text Label 8850 3300 0 50 ~ 0
-8
-Text Label 8850 3450 0 50 ~ 0
-9
-Text Label 8850 3150 0 50 ~ 0
-10
-Text Label 9200 4300 0 50 ~ 0
-11
-Text Label 8300 4250 0 50 ~ 0
-12
-Wire Wire Line
- 8300 5000 8800 5000
-Wire Wire Line
- 9200 5000 9200 4850
-$Comp
-L power:GND #PWR?
-U 1 1 5F1901DC
-P 8800 5200
-F 0 "#PWR?" H 8800 4950 50 0001 C CNN
-F 1 "GND" H 8805 5027 50 0000 C CNN
-F 2 "" H 8800 5200 50 0001 C CNN
-F 3 "" H 8800 5200 50 0001 C CNN
- 1 8800 5200
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 8800 5200 8800 5000
-Connection ~ 8800 5000
-Wire Wire Line
- 8800 5000 9200 5000
-Text Label 8800 5150 0 50 ~ 0
-13
-Wire Wire Line
- 5350 3200 5900 3200
-Wire Wire Line
- 5900 2800 5900 2300
-Wire Wire Line
- 5900 2300 6000 2300
-Wire Wire Line
- 5350 2800 5900 2800
-Wire Wire Line
- 6400 3000 6400 2300
-Wire Wire Line
- 5350 3000 6400 3000
-Wire Wire Line
- 6400 2100 8500 2100
-Wire Wire Line
- 8500 2100 8500 3600
-Wire Wire Line
- 5850 1750 8300 1750
-Wire Wire Line
- 8300 1750 8300 3200
-$EndSCHEMATC
+++ /dev/null
-EESchema Schematic File Version 4
-EELAYER 30 0
-EELAYER END
-$Descr A4 11693 8268
-encoding utf-8
-Sheet 1 6
-Title ""
-Date ""
-Rev ""
-Comp ""
-Comment1 ""
-Comment2 ""
-Comment3 ""
-Comment4 ""
-$EndDescr
-$Sheet
-S 3850 2600 1050 900
-U 5F09F92C
-F0 "transformer board" 50
-F1 "transformer board.sch" 50
-F2 "220V_in1" I L 3850 2800 50
-F3 "220V_in2" I L 3850 3000 50
-F4 "pwr_switch_1" B R 4900 2800 50
-F5 "pwr_switch_2" B R 4900 3000 50
-F6 "+30V" O R 4900 3200 50
-F7 "GND" O R 4900 3400 50
-$EndSheet
-$Comp
-L Connector:Conn_WallPlug P1
-U 1 1 5F0B857F
-P 3350 2900
-F 0 "P1" H 3367 3225 50 0000 C CNN
-F 1 "Conn_WallPlug" H 3367 3134 50 0000 C CNN
-F 2 "" H 3750 2900 50 0001 C CNN
-F 3 "~" H 3750 2900 50 0001 C CNN
- 1 3350 2900
- 1 0 0 -1
-$EndComp
-$Comp
-L power:GND #PWR01
-U 1 1 5F0B8AF8
-P 5000 3500
-F 0 "#PWR01" H 5000 3250 50 0001 C CNN
-F 1 "GND" H 5005 3327 50 0000 C CNN
-F 2 "" H 5000 3500 50 0001 C CNN
-F 3 "" H 5000 3500 50 0001 C CNN
- 1 5000 3500
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 5000 3500 5000 3400
-Wire Wire Line
- 5000 3400 4900 3400
-Wire Wire Line
- 3550 2800 3850 2800
-Wire Wire Line
- 3550 3000 3850 3000
-$Comp
-L Switch:SW_DPST SW1
-U 1 1 5F0BC431
-P 5300 2100
-F 0 "SW1" H 5300 2425 50 0000 C CNN
-F 1 "SW_DPST" H 5300 2334 50 0000 C CNN
-F 2 "" H 5300 2100 50 0001 C CNN
-F 3 "~" H 5300 2100 50 0001 C CNN
- 1 5300 2100
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4900 2800 5100 2800
-Wire Wire Line
- 5100 2800 5100 2200
-Wire Wire Line
- 4900 3000 5500 3000
-Wire Wire Line
- 5500 3000 5500 2200
-$Sheet
-S 7200 3050 600 300
-U 5F0BCD3F
-F0 "current limiter" 50
-F1 "current limiter.sch" 50
-F2 "V_in" I L 7200 3200 50
-F3 "V_out" O R 7800 3200 50
-$EndSheet
-$Sheet
-S 5900 3100 600 350
-U 5F0C4B8D
-F0 "DC2DC step down" 50
-F1 "DC2DC step down.sch" 50
-F2 "V_in" I L 5900 3200 50
-F3 "V_out" I R 6500 3200 50
-F4 "GND" B L 5900 3350 50
-$EndSheet
-Wire Wire Line
- 4900 3200 5900 3200
-Wire Wire Line
- 6500 3200 7200 3200
-Wire Wire Line
- 7800 3200 8300 3200
-Wire Wire Line
- 8300 3200 8300 3300
-Wire Wire Line
- 8300 3700 7000 3700
-Wire Wire Line
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-Wire Wire Line
- 7000 4150 7200 4150
-$Sheet
-S 8950 3050 1400 800
-U 5F0CC4B7
-F0 "connector terminal" 50
-F1 "connector terminal.sch" 50
-F2 "5V" I L 8950 3150 50
-F3 "13V" I L 8950 3300 50
-F4 "GND" I L 8950 3450 50
-F5 "Battery" B L 8950 3600 50
-$EndSheet
-Wire Wire Line
- 7800 4150 8650 4150
-Wire Wire Line
- 8650 4150 8650 3150
-Wire Wire Line
- 8650 3150 8950 3150
-Wire Wire Line
- 8950 3300 8300 3300
-Connection ~ 8300 3300
-Wire Wire Line
- 8300 3300 8300 3700
-$Comp
-L power:GND #PWR019
-U 1 1 5F170709
-P 8800 3700
-F 0 "#PWR019" H 8800 3450 50 0001 C CNN
-F 1 "GND" H 8805 3527 50 0000 C CNN
-F 2 "" H 8800 3700 50 0001 C CNN
-F 3 "" H 8800 3700 50 0001 C CNN
- 1 8800 3700
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 5500 2000 8500 2000
-Wire Wire Line
- 8500 2000 8500 3600
-Wire Wire Line
- 8500 3600 8950 3600
-Wire Wire Line
- 8800 3700 8800 3450
-Wire Wire Line
- 8800 3450 8950 3450
-Wire Wire Line
- 5100 2000 4950 2000
-Wire Wire Line
- 4950 2000 4950 1650
-Wire Wire Line
- 4950 1650 8300 1650
-Wire Wire Line
- 8300 1650 8300 3200
-Connection ~ 8300 3200
-$Comp
-L Device:Voltmeter_DC MES1
-U 1 1 5F175320
-P 8300 4600
-F 0 "MES1" H 8453 4646 50 0000 L CNN
-F 1 "Voltmeter_DC" H 8453 4555 50 0000 L CNN
-F 2 "" V 8300 4700 50 0001 C CNN
-F 3 "~" V 8300 4700 50 0001 C CNN
- 1 8300 4600
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:Voltmeter_DC MES2
-U 1 1 5F1764EC
-P 9200 4650
-F 0 "MES2" H 9353 4696 50 0000 L CNN
-F 1 "Voltmeter_DC" H 9353 4605 50 0000 L CNN
-F 2 "" V 9200 4750 50 0001 C CNN
-F 3 "~" V 9200 4750 50 0001 C CNN
- 1 9200 4650
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 8300 5000 8300 4800
-Wire Wire Line
- 8300 4400 8300 3700
-Connection ~ 8300 3700
-Wire Wire Line
- 8650 4150 9200 4150
-Wire Wire Line
- 9200 4150 9200 4450
-Connection ~ 8650 4150
-$Sheet
-S 7200 4050 600 350
-U 5F182C5C
-F0 "sheet5F182C5C" 50
-F1 "DC2DC step down.sch" 50
-F2 "V_in" I L 7200 4150 50
-F3 "V_out" I R 7800 4150 50
-F4 "GND" B L 7200 4300 50
-$EndSheet
-$Comp
-L power:GND #PWR022
-U 1 1 5F1843C4
-P 7050 4400
-F 0 "#PWR022" H 7050 4150 50 0001 C CNN
-F 1 "GND" H 7055 4227 50 0000 C CNN
-F 2 "" H 7050 4400 50 0001 C CNN
-F 3 "" H 7050 4400 50 0001 C CNN
- 1 7050 4400
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 7050 4400 7050 4300
-Wire Wire Line
- 7050 4300 7200 4300
-$Comp
-L power:GND #PWR021
-U 1 1 5F184BC7
-P 5750 3450
-F 0 "#PWR021" H 5750 3200 50 0001 C CNN
-F 1 "GND" H 5755 3277 50 0000 C CNN
-F 2 "" H 5750 3450 50 0001 C CNN
-F 3 "" H 5750 3450 50 0001 C CNN
- 1 5750 3450
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 5750 3450 5750 3350
-Wire Wire Line
- 5750 3350 5900 3350
-Text Label 7100 3200 0 50 ~ 0
-5
-Text Label 7850 3200 0 50 ~ 0
-6
-Text Label 4950 3400 0 50 ~ 0
-1
-Text Label 4950 3200 0 50 ~ 0
-2
-Text Label 5000 2000 0 50 ~ 0
-3
-Text Label 5600 2000 0 50 ~ 0
-4
-Text Label 8850 3600 0 50 ~ 0
-7
-Text Label 8850 3300 0 50 ~ 0
-8
-Text Label 8850 3450 0 50 ~ 0
-9
-Text Label 8850 3150 0 50 ~ 0
-10
-Text Label 9200 4300 0 50 ~ 0
-11
-Text Label 8300 4250 0 50 ~ 0
-12
-Wire Wire Line
- 8300 5000 8800 5000
-Wire Wire Line
- 9200 5000 9200 4850
-$Comp
-L power:GND #PWR?
-U 1 1 5F1901DC
-P 8800 5200
-F 0 "#PWR?" H 8800 4950 50 0001 C CNN
-F 1 "GND" H 8805 5027 50 0000 C CNN
-F 2 "" H 8800 5200 50 0001 C CNN
-F 3 "" H 8800 5200 50 0001 C CNN
- 1 8800 5200
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 8800 5200 8800 5000
-Connection ~ 8800 5000
-Wire Wire Line
- 8800 5000 9200 5000
-Text Label 8800 5150 0 50 ~ 0
-13
-$EndSCHEMATC
+++ /dev/null
-EESchema Schematic File Version 4
-EELAYER 30 0
-EELAYER END
-$Descr A4 11693 8268
-encoding utf-8
-Sheet 6 6
-Title ""
-Date ""
-Rev ""
-Comp ""
-Comment1 ""
-Comment2 ""
-Comment3 ""
-Comment4 ""
-$EndDescr
-$Comp
-L Connector:USB_A J1
-U 1 1 5F0CC9AF
-P 2750 1650
-F 0 "J1" H 2807 2117 50 0000 C CNN
-F 1 "USB_A" H 2807 2026 50 0000 C CNN
-F 2 "" H 2900 1600 50 0001 C CNN
-F 3 " ~" H 2900 1600 50 0001 C CNN
- 1 2750 1650
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 3050 1650 3050 1750
-$Comp
-L Connector:USB_A J4
-U 1 1 5F0CE176
-P 3550 1650
-F 0 "J4" H 3607 2117 50 0000 C CNN
-F 1 "USB_A" H 3607 2026 50 0000 C CNN
-F 2 "" H 3700 1600 50 0001 C CNN
-F 3 " ~" H 3700 1600 50 0001 C CNN
- 1 3550 1650
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 3850 1650 3850 1750
-Wire Wire Line
- 3050 1450 3150 1450
-Wire Wire Line
- 3150 1450 3150 950
-Wire Wire Line
- 3150 950 3950 950
-Wire Wire Line
- 3950 950 3950 1450
-Wire Wire Line
- 3950 1450 3850 1450
-$Comp
-L power:GND #PWR03
-U 1 1 5F0CF308
-P 2750 2100
-F 0 "#PWR03" H 2750 1850 50 0001 C CNN
-F 1 "GND" H 2755 1927 50 0000 C CNN
-F 2 "" H 2750 2100 50 0001 C CNN
-F 3 "" H 2750 2100 50 0001 C CNN
- 1 2750 2100
- 1 0 0 -1
-$EndComp
-$Comp
-L power:GND #PWR06
-U 1 1 5F0CF8C4
-P 3550 2100
-F 0 "#PWR06" H 3550 1850 50 0001 C CNN
-F 1 "GND" H 3555 1927 50 0000 C CNN
-F 2 "" H 3550 2100 50 0001 C CNN
-F 3 "" H 3550 2100 50 0001 C CNN
- 1 3550 2100
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 2750 2100 2750 2050
-Wire Wire Line
- 3550 2100 3550 2050
-Text HLabel 1100 950 0 50 Input ~ 0
-5V
-Wire Wire Line
- 1100 950 2350 950
-Connection ~ 3150 950
-Text HLabel 1100 1100 0 50 Input ~ 0
-13V
-Wire Wire Line
- 1100 1100 2200 1100
-Wire Wire Line
- 3300 1100 3300 1650
-Wire Wire Line
- 3300 1650 3050 1650
-Connection ~ 3050 1650
-Wire Wire Line
- 3300 1100 4100 1100
-Wire Wire Line
- 4100 1100 4100 1650
-Wire Wire Line
- 4100 1650 3850 1650
-Connection ~ 3300 1100
-Connection ~ 3850 1650
-Text HLabel 1100 1250 0 50 Input ~ 0
-GND
-Text HLabel 1350 4400 0 50 BiDi ~ 0
-Battery
-$Comp
-L power:GND #PWR02
-U 1 1 5F0D429A
-P 1200 1300
-F 0 "#PWR02" H 1200 1050 50 0001 C CNN
-F 1 "GND" H 1205 1127 50 0000 C CNN
-F 2 "" H 1200 1300 50 0001 C CNN
-F 3 "" H 1200 1300 50 0001 C CNN
- 1 1200 1300
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 1200 1300 1200 1250
-Wire Wire Line
- 1200 1250 1100 1250
-$Comp
-L Connector:USB_A J7
-U 1 1 5F0D4E49
-P 4350 1650
-F 0 "J7" H 4407 2117 50 0000 C CNN
-F 1 "USB_A" H 4407 2026 50 0000 C CNN
-F 2 "" H 4500 1600 50 0001 C CNN
-F 3 " ~" H 4500 1600 50 0001 C CNN
- 1 4350 1650
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4650 1650 4650 1750
-Wire Wire Line
- 3950 950 4750 950
-Wire Wire Line
- 4750 950 4750 1450
-Wire Wire Line
- 4750 1450 4650 1450
-$Comp
-L power:GND #PWR09
-U 1 1 5F0D4E57
-P 4350 2100
-F 0 "#PWR09" H 4350 1850 50 0001 C CNN
-F 1 "GND" H 4355 1927 50 0000 C CNN
-F 2 "" H 4350 2100 50 0001 C CNN
-F 3 "" H 4350 2100 50 0001 C CNN
- 1 4350 2100
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4350 2100 4350 2050
-Wire Wire Line
- 4100 1100 4900 1100
-Wire Wire Line
- 4900 1100 4900 1650
-Wire Wire Line
- 4900 1650 4650 1650
-Connection ~ 4650 1650
-Connection ~ 3950 950
-Connection ~ 4100 1100
-Wire Wire Line
- 2650 2400 3450 2400
-Wire Wire Line
- 2650 2050 2650 2400
-Wire Wire Line
- 3450 2050 3450 2400
-Wire Wire Line
- 3450 2400 4250 2400
-Wire Wire Line
- 4250 2400 4250 2050
-Connection ~ 3450 2400
-$Comp
-L Device:C C2
-U 1 1 5F0D832F
-P 4900 1950
-F 0 "C2" H 5015 1996 50 0000 L CNN
-F 1 "C" H 5015 1905 50 0000 L CNN
-F 2 "" H 4938 1800 50 0001 C CNN
-F 3 "~" H 4900 1950 50 0001 C CNN
- 1 4900 1950
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4900 1800 4900 1650
-Connection ~ 4900 1650
-$Comp
-L power:GND #PWR012
-U 1 1 5F0D8E3C
-P 4900 2200
-F 0 "#PWR012" H 4900 1950 50 0001 C CNN
-F 1 "GND" H 4905 2027 50 0000 C CNN
-F 2 "" H 4900 2200 50 0001 C CNN
-F 3 "" H 4900 2200 50 0001 C CNN
- 1 4900 2200
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4900 2200 4900 2100
-$Comp
-L Device:C C5
-U 1 1 5F0D95F5
-P 5250 1600
-F 0 "C5" H 5365 1646 50 0000 L CNN
-F 1 "C" H 5365 1555 50 0000 L CNN
-F 2 "" H 5288 1450 50 0001 C CNN
-F 3 "~" H 5250 1600 50 0001 C CNN
- 1 5250 1600
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 5250 1450 4750 1450
-Connection ~ 4750 1450
-$Comp
-L power:GND #PWR015
-U 1 1 5F0D9E27
-P 5250 1850
-F 0 "#PWR015" H 5250 1600 50 0001 C CNN
-F 1 "GND" H 5255 1677 50 0000 C CNN
-F 2 "" H 5250 1850 50 0001 C CNN
-F 3 "" H 5250 1850 50 0001 C CNN
- 1 5250 1850
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 5250 1850 5250 1750
-$Comp
-L Connector:USB_A J2
-U 1 1 5F0DE4EE
-P 2750 3250
-F 0 "J2" H 2807 3717 50 0000 C CNN
-F 1 "USB_A" H 2807 3626 50 0000 C CNN
-F 2 "" H 2900 3200 50 0001 C CNN
-F 3 " ~" H 2900 3200 50 0001 C CNN
- 1 2750 3250
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 3050 3250 3050 3350
-$Comp
-L Connector:USB_A J5
-U 1 1 5F0DE4F9
-P 3550 3250
-F 0 "J5" H 3607 3717 50 0000 C CNN
-F 1 "USB_A" H 3607 3626 50 0000 C CNN
-F 2 "" H 3700 3200 50 0001 C CNN
-F 3 " ~" H 3700 3200 50 0001 C CNN
- 1 3550 3250
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 3850 3250 3850 3350
-Wire Wire Line
- 3050 3050 3150 3050
-Wire Wire Line
- 3150 3050 3150 2550
-Wire Wire Line
- 3150 2550 3950 2550
-Wire Wire Line
- 3950 2550 3950 3050
-Wire Wire Line
- 3950 3050 3850 3050
-$Comp
-L power:GND #PWR04
-U 1 1 5F0DE509
-P 2750 3700
-F 0 "#PWR04" H 2750 3450 50 0001 C CNN
-F 1 "GND" H 2755 3527 50 0000 C CNN
-F 2 "" H 2750 3700 50 0001 C CNN
-F 3 "" H 2750 3700 50 0001 C CNN
- 1 2750 3700
- 1 0 0 -1
-$EndComp
-$Comp
-L power:GND #PWR07
-U 1 1 5F0DE513
-P 3550 3700
-F 0 "#PWR07" H 3550 3450 50 0001 C CNN
-F 1 "GND" H 3555 3527 50 0000 C CNN
-F 2 "" H 3550 3700 50 0001 C CNN
-F 3 "" H 3550 3700 50 0001 C CNN
- 1 3550 3700
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 2750 3700 2750 3650
-Wire Wire Line
- 3550 3700 3550 3650
-Wire Wire Line
- 3300 2700 3300 3250
-Wire Wire Line
- 3300 3250 3050 3250
-Connection ~ 3050 3250
-Wire Wire Line
- 3300 2700 4100 2700
-Wire Wire Line
- 4100 2700 4100 3250
-Wire Wire Line
- 4100 3250 3850 3250
-Connection ~ 3850 3250
-$Comp
-L Connector:USB_A J8
-U 1 1 5F0DE52A
-P 4350 3250
-F 0 "J8" H 4407 3717 50 0000 C CNN
-F 1 "USB_A" H 4407 3626 50 0000 C CNN
-F 2 "" H 4500 3200 50 0001 C CNN
-F 3 " ~" H 4500 3200 50 0001 C CNN
- 1 4350 3250
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4650 3250 4650 3350
-Wire Wire Line
- 3950 2550 4750 2550
-Wire Wire Line
- 4750 2550 4750 3050
-Wire Wire Line
- 4750 3050 4650 3050
-$Comp
-L power:GND #PWR010
-U 1 1 5F0DE538
-P 4350 3700
-F 0 "#PWR010" H 4350 3450 50 0001 C CNN
-F 1 "GND" H 4355 3527 50 0000 C CNN
-F 2 "" H 4350 3700 50 0001 C CNN
-F 3 "" H 4350 3700 50 0001 C CNN
- 1 4350 3700
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4350 3700 4350 3650
-Wire Wire Line
- 4100 2700 4900 2700
-Wire Wire Line
- 4900 2700 4900 3250
-Wire Wire Line
- 4900 3250 4650 3250
-Connection ~ 4650 3250
-Connection ~ 3950 2550
-Connection ~ 4100 2700
-Wire Wire Line
- 2650 3650 2650 4000
-Wire Wire Line
- 3450 3650 3450 4000
-Wire Wire Line
- 3450 4000 4250 4000
-Wire Wire Line
- 4250 4000 4250 3650
-Connection ~ 3450 4000
-$Comp
-L Device:C C3
-U 1 1 5F0DE54F
-P 4900 3550
-F 0 "C3" H 5015 3596 50 0000 L CNN
-F 1 "C" H 5015 3505 50 0000 L CNN
-F 2 "" H 4938 3400 50 0001 C CNN
-F 3 "~" H 4900 3550 50 0001 C CNN
- 1 4900 3550
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4900 3400 4900 3250
-Connection ~ 4900 3250
-$Comp
-L power:GND #PWR013
-U 1 1 5F0DE55B
-P 4900 3800
-F 0 "#PWR013" H 4900 3550 50 0001 C CNN
-F 1 "GND" H 4905 3627 50 0000 C CNN
-F 2 "" H 4900 3800 50 0001 C CNN
-F 3 "" H 4900 3800 50 0001 C CNN
- 1 4900 3800
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4900 3800 4900 3700
-$Comp
-L Device:C C6
-U 1 1 5F0DE566
-P 5250 3200
-F 0 "C6" H 5365 3246 50 0000 L CNN
-F 1 "C" H 5365 3155 50 0000 L CNN
-F 2 "" H 5288 3050 50 0001 C CNN
-F 3 "~" H 5250 3200 50 0001 C CNN
- 1 5250 3200
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 5250 3050 4750 3050
-Connection ~ 4750 3050
-$Comp
-L power:GND #PWR016
-U 1 1 5F0DE572
-P 5250 3450
-F 0 "#PWR016" H 5250 3200 50 0001 C CNN
-F 1 "GND" H 5255 3277 50 0000 C CNN
-F 2 "" H 5250 3450 50 0001 C CNN
-F 3 "" H 5250 3450 50 0001 C CNN
- 1 5250 3450
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 5250 3450 5250 3350
-Wire Wire Line
- 3150 2550 2350 2550
-Wire Wire Line
- 2350 2550 2350 950
-Connection ~ 3150 2550
-Connection ~ 2350 950
-Wire Wire Line
- 2350 950 3150 950
-Wire Wire Line
- 3300 2700 2200 2700
-Wire Wire Line
- 2200 2700 2200 1100
-Connection ~ 3300 2700
-Connection ~ 2200 1100
-Wire Wire Line
- 2200 1100 3300 1100
-$Comp
-L Connector:USB_A J3
-U 1 1 5F10B6BB
-P 2750 4850
-F 0 "J3" H 2807 5317 50 0000 C CNN
-F 1 "USB_A" H 2807 5226 50 0000 C CNN
-F 2 "" H 2900 4800 50 0001 C CNN
-F 3 " ~" H 2900 4800 50 0001 C CNN
- 1 2750 4850
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 3050 4850 3050 4950
-$Comp
-L Connector:USB_A J6
-U 1 1 5F10B6C6
-P 3550 4850
-F 0 "J6" H 3607 5317 50 0000 C CNN
-F 1 "USB_A" H 3607 5226 50 0000 C CNN
-F 2 "" H 3700 4800 50 0001 C CNN
-F 3 " ~" H 3700 4800 50 0001 C CNN
- 1 3550 4850
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 3850 4850 3850 4950
-Wire Wire Line
- 3950 4150 3950 4650
-Wire Wire Line
- 3950 4650 3850 4650
-$Comp
-L power:GND #PWR05
-U 1 1 5F10B6D6
-P 2750 5300
-F 0 "#PWR05" H 2750 5050 50 0001 C CNN
-F 1 "GND" H 2755 5127 50 0000 C CNN
-F 2 "" H 2750 5300 50 0001 C CNN
-F 3 "" H 2750 5300 50 0001 C CNN
- 1 2750 5300
- 1 0 0 -1
-$EndComp
-$Comp
-L power:GND #PWR08
-U 1 1 5F10B6E0
-P 3550 5300
-F 0 "#PWR08" H 3550 5050 50 0001 C CNN
-F 1 "GND" H 3555 5127 50 0000 C CNN
-F 2 "" H 3550 5300 50 0001 C CNN
-F 3 "" H 3550 5300 50 0001 C CNN
- 1 3550 5300
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 2750 5300 2750 5250
-Wire Wire Line
- 3550 5300 3550 5250
-Wire Wire Line
- 4100 4300 4100 4850
-Wire Wire Line
- 4100 4850 3850 4850
-Connection ~ 3850 4850
-$Comp
-L Connector:USB_A J9
-U 1 1 5F10B6F3
-P 4350 4850
-F 0 "J9" H 4407 5317 50 0000 C CNN
-F 1 "USB_A" H 4407 5226 50 0000 C CNN
-F 2 "" H 4500 4800 50 0001 C CNN
-F 3 " ~" H 4500 4800 50 0001 C CNN
- 1 4350 4850
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4650 4850 4650 4950
-Wire Wire Line
- 4750 4150 4750 4650
-Wire Wire Line
- 4750 4650 4650 4650
-$Comp
-L power:GND #PWR011
-U 1 1 5F10B701
-P 4350 5300
-F 0 "#PWR011" H 4350 5050 50 0001 C CNN
-F 1 "GND" H 4355 5127 50 0000 C CNN
-F 2 "" H 4350 5300 50 0001 C CNN
-F 3 "" H 4350 5300 50 0001 C CNN
- 1 4350 5300
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4350 5300 4350 5250
-Wire Wire Line
- 4100 4300 4900 4300
-Wire Wire Line
- 4900 4300 4900 4850
-Wire Wire Line
- 4900 4850 4650 4850
-Connection ~ 4650 4850
-Connection ~ 3950 4150
-Connection ~ 4100 4300
-Wire Wire Line
- 3450 5250 3450 5600
-Wire Wire Line
- 3450 5600 4250 5600
-Wire Wire Line
- 4250 5600 4250 5250
-$Comp
-L Device:C C4
-U 1 1 5F10B718
-P 4900 5150
-F 0 "C4" H 5015 5196 50 0000 L CNN
-F 1 "C" H 5015 5105 50 0000 L CNN
-F 2 "" H 4938 5000 50 0001 C CNN
-F 3 "~" H 4900 5150 50 0001 C CNN
- 1 4900 5150
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4900 5000 4900 4850
-Connection ~ 4900 4850
-$Comp
-L power:GND #PWR014
-U 1 1 5F10B724
-P 4900 5400
-F 0 "#PWR014" H 4900 5150 50 0001 C CNN
-F 1 "GND" H 4905 5227 50 0000 C CNN
-F 2 "" H 4900 5400 50 0001 C CNN
-F 3 "" H 4900 5400 50 0001 C CNN
- 1 4900 5400
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4900 5400 4900 5300
-$Comp
-L Device:C C7
-U 1 1 5F10B72F
-P 5250 4800
-F 0 "C7" H 5365 4846 50 0000 L CNN
-F 1 "C" H 5365 4755 50 0000 L CNN
-F 2 "" H 5288 4650 50 0001 C CNN
-F 3 "~" H 5250 4800 50 0001 C CNN
- 1 5250 4800
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 5250 4650 4750 4650
-Connection ~ 4750 4650
-$Comp
-L power:GND #PWR017
-U 1 1 5F10B73B
-P 5250 5050
-F 0 "#PWR017" H 5250 4800 50 0001 C CNN
-F 1 "GND" H 5255 4877 50 0000 C CNN
-F 2 "" H 5250 5050 50 0001 C CNN
-F 3 "" H 5250 5050 50 0001 C CNN
- 1 5250 5050
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 5250 5050 5250 4950
-Wire Wire Line
- 2350 4150 2350 2550
-Wire Wire Line
- 2200 4300 2200 2700
-Connection ~ 2200 2700
-Connection ~ 2350 2550
-Wire Wire Line
- 2350 4150 3950 4150
-Wire Wire Line
- 3950 4150 4750 4150
-Wire Wire Line
- 2200 4300 4100 4300
-Wire Wire Line
- 1350 4400 3200 4400
-Wire Wire Line
- 3200 4400 3200 4850
-Wire Wire Line
- 3200 4850 3050 4850
-Connection ~ 3050 4850
-Wire Wire Line
- 2650 2400 2050 2400
-Wire Wire Line
- 2050 2400 2050 4000
-Wire Wire Line
- 2050 4000 2650 4000
-Connection ~ 2650 2400
-Connection ~ 2650 4000
-Wire Wire Line
- 2650 4000 3450 4000
-Wire Wire Line
- 2050 4000 2050 5600
-Wire Wire Line
- 2050 5600 3450 5600
-Connection ~ 2050 4000
-Connection ~ 3450 5600
-$EndSCHEMATC
+++ /dev/null
-EESchema Schematic File Version 4
-EELAYER 30 0
-EELAYER END
-$Descr A4 11693 8268
-encoding utf-8
-Sheet 6 6
-Title ""
-Date ""
-Rev ""
-Comp ""
-Comment1 ""
-Comment2 ""
-Comment3 ""
-Comment4 ""
-$EndDescr
-$Comp
-L Connector:USB_A J1
-U 1 1 5F0CC9AF
-P 2750 1650
-F 0 "J1" H 2807 2117 50 0000 C CNN
-F 1 "USB_A" H 2807 2026 50 0000 C CNN
-F 2 "" H 2900 1600 50 0001 C CNN
-F 3 " ~" H 2900 1600 50 0001 C CNN
- 1 2750 1650
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 3050 1650 3050 1750
-$Comp
-L Connector:USB_A J4
-U 1 1 5F0CE176
-P 3550 1650
-F 0 "J4" H 3607 2117 50 0000 C CNN
-F 1 "USB_A" H 3607 2026 50 0000 C CNN
-F 2 "" H 3700 1600 50 0001 C CNN
-F 3 " ~" H 3700 1600 50 0001 C CNN
- 1 3550 1650
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 3850 1650 3850 1750
-Wire Wire Line
- 3050 1450 3150 1450
-Wire Wire Line
- 3150 1450 3150 950
-Wire Wire Line
- 3150 950 3950 950
-Wire Wire Line
- 3950 950 3950 1450
-Wire Wire Line
- 3950 1450 3850 1450
-$Comp
-L power:GND #PWR03
-U 1 1 5F0CF308
-P 2750 2100
-F 0 "#PWR03" H 2750 1850 50 0001 C CNN
-F 1 "GND" H 2755 1927 50 0000 C CNN
-F 2 "" H 2750 2100 50 0001 C CNN
-F 3 "" H 2750 2100 50 0001 C CNN
- 1 2750 2100
- 1 0 0 -1
-$EndComp
-$Comp
-L power:GND #PWR06
-U 1 1 5F0CF8C4
-P 3550 2100
-F 0 "#PWR06" H 3550 1850 50 0001 C CNN
-F 1 "GND" H 3555 1927 50 0000 C CNN
-F 2 "" H 3550 2100 50 0001 C CNN
-F 3 "" H 3550 2100 50 0001 C CNN
- 1 3550 2100
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 2750 2100 2750 2050
-Wire Wire Line
- 3550 2100 3550 2050
-Text HLabel 1100 950 0 50 Input ~ 0
-5V
-Wire Wire Line
- 1100 950 2350 950
-Connection ~ 3150 950
-Text HLabel 1100 1100 0 50 Input ~ 0
-13V
-Wire Wire Line
- 1100 1100 2200 1100
-Wire Wire Line
- 3300 1100 3300 1650
-Wire Wire Line
- 3300 1650 3050 1650
-Connection ~ 3050 1650
-Wire Wire Line
- 3300 1100 4100 1100
-Wire Wire Line
- 4100 1100 4100 1650
-Wire Wire Line
- 4100 1650 3850 1650
-Connection ~ 3300 1100
-Connection ~ 3850 1650
-Text HLabel 1100 1250 0 50 Input ~ 0
-GND
-Text HLabel 1350 4400 0 50 BiDi ~ 0
-Battery
-$Comp
-L power:GND #PWR02
-U 1 1 5F0D429A
-P 1200 1300
-F 0 "#PWR02" H 1200 1050 50 0001 C CNN
-F 1 "GND" H 1205 1127 50 0000 C CNN
-F 2 "" H 1200 1300 50 0001 C CNN
-F 3 "" H 1200 1300 50 0001 C CNN
- 1 1200 1300
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 1200 1300 1200 1250
-Wire Wire Line
- 1200 1250 1100 1250
-$Comp
-L Connector:USB_A J7
-U 1 1 5F0D4E49
-P 4350 1650
-F 0 "J7" H 4407 2117 50 0000 C CNN
-F 1 "USB_A" H 4407 2026 50 0000 C CNN
-F 2 "" H 4500 1600 50 0001 C CNN
-F 3 " ~" H 4500 1600 50 0001 C CNN
- 1 4350 1650
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4650 1650 4650 1750
-Wire Wire Line
- 3950 950 4750 950
-Wire Wire Line
- 4750 950 4750 1450
-Wire Wire Line
- 4750 1450 4650 1450
-$Comp
-L power:GND #PWR09
-U 1 1 5F0D4E57
-P 4350 2100
-F 0 "#PWR09" H 4350 1850 50 0001 C CNN
-F 1 "GND" H 4355 1927 50 0000 C CNN
-F 2 "" H 4350 2100 50 0001 C CNN
-F 3 "" H 4350 2100 50 0001 C CNN
- 1 4350 2100
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4350 2100 4350 2050
-Wire Wire Line
- 4100 1100 4900 1100
-Wire Wire Line
- 4900 1100 4900 1650
-Wire Wire Line
- 4900 1650 4650 1650
-Connection ~ 4650 1650
-Connection ~ 3950 950
-Connection ~ 4100 1100
-Wire Wire Line
- 2650 2400 3450 2400
-Wire Wire Line
- 2650 2050 2650 2400
-Wire Wire Line
- 3450 2050 3450 2400
-Wire Wire Line
- 3450 2400 4250 2400
-Wire Wire Line
- 4250 2400 4250 2050
-Connection ~ 3450 2400
-$Comp
-L Device:C C2
-U 1 1 5F0D832F
-P 4900 1950
-F 0 "C2" H 5015 1996 50 0000 L CNN
-F 1 "C" H 5015 1905 50 0000 L CNN
-F 2 "" H 4938 1800 50 0001 C CNN
-F 3 "~" H 4900 1950 50 0001 C CNN
- 1 4900 1950
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4900 1800 4900 1650
-Connection ~ 4900 1650
-$Comp
-L power:GND #PWR012
-U 1 1 5F0D8E3C
-P 4900 2200
-F 0 "#PWR012" H 4900 1950 50 0001 C CNN
-F 1 "GND" H 4905 2027 50 0000 C CNN
-F 2 "" H 4900 2200 50 0001 C CNN
-F 3 "" H 4900 2200 50 0001 C CNN
- 1 4900 2200
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4900 2200 4900 2100
-$Comp
-L Device:C C5
-U 1 1 5F0D95F5
-P 5250 1600
-F 0 "C5" H 5365 1646 50 0000 L CNN
-F 1 "C" H 5365 1555 50 0000 L CNN
-F 2 "" H 5288 1450 50 0001 C CNN
-F 3 "~" H 5250 1600 50 0001 C CNN
- 1 5250 1600
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 5250 1450 4750 1450
-Connection ~ 4750 1450
-$Comp
-L power:GND #PWR015
-U 1 1 5F0D9E27
-P 5250 1850
-F 0 "#PWR015" H 5250 1600 50 0001 C CNN
-F 1 "GND" H 5255 1677 50 0000 C CNN
-F 2 "" H 5250 1850 50 0001 C CNN
-F 3 "" H 5250 1850 50 0001 C CNN
- 1 5250 1850
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 5250 1850 5250 1750
-$Comp
-L Connector:USB_A J2
-U 1 1 5F0DE4EE
-P 2750 3250
-F 0 "J2" H 2807 3717 50 0000 C CNN
-F 1 "USB_A" H 2807 3626 50 0000 C CNN
-F 2 "" H 2900 3200 50 0001 C CNN
-F 3 " ~" H 2900 3200 50 0001 C CNN
- 1 2750 3250
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 3050 3250 3050 3350
-$Comp
-L Connector:USB_A J5
-U 1 1 5F0DE4F9
-P 3550 3250
-F 0 "J5" H 3607 3717 50 0000 C CNN
-F 1 "USB_A" H 3607 3626 50 0000 C CNN
-F 2 "" H 3700 3200 50 0001 C CNN
-F 3 " ~" H 3700 3200 50 0001 C CNN
- 1 3550 3250
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 3850 3250 3850 3350
-Wire Wire Line
- 3050 3050 3150 3050
-Wire Wire Line
- 3150 3050 3150 2550
-Wire Wire Line
- 3150 2550 3950 2550
-Wire Wire Line
- 3950 2550 3950 3050
-Wire Wire Line
- 3950 3050 3850 3050
-$Comp
-L power:GND #PWR04
-U 1 1 5F0DE509
-P 2750 3700
-F 0 "#PWR04" H 2750 3450 50 0001 C CNN
-F 1 "GND" H 2755 3527 50 0000 C CNN
-F 2 "" H 2750 3700 50 0001 C CNN
-F 3 "" H 2750 3700 50 0001 C CNN
- 1 2750 3700
- 1 0 0 -1
-$EndComp
-$Comp
-L power:GND #PWR07
-U 1 1 5F0DE513
-P 3550 3700
-F 0 "#PWR07" H 3550 3450 50 0001 C CNN
-F 1 "GND" H 3555 3527 50 0000 C CNN
-F 2 "" H 3550 3700 50 0001 C CNN
-F 3 "" H 3550 3700 50 0001 C CNN
- 1 3550 3700
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 2750 3700 2750 3650
-Wire Wire Line
- 3550 3700 3550 3650
-Wire Wire Line
- 3300 2700 3300 3250
-Wire Wire Line
- 3300 3250 3050 3250
-Connection ~ 3050 3250
-Wire Wire Line
- 3300 2700 4100 2700
-Wire Wire Line
- 4100 2700 4100 3250
-Wire Wire Line
- 4100 3250 3850 3250
-Connection ~ 3850 3250
-$Comp
-L Connector:USB_A J8
-U 1 1 5F0DE52A
-P 4350 3250
-F 0 "J8" H 4407 3717 50 0000 C CNN
-F 1 "USB_A" H 4407 3626 50 0000 C CNN
-F 2 "" H 4500 3200 50 0001 C CNN
-F 3 " ~" H 4500 3200 50 0001 C CNN
- 1 4350 3250
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4650 3250 4650 3350
-Wire Wire Line
- 3950 2550 4750 2550
-Wire Wire Line
- 4750 2550 4750 3050
-Wire Wire Line
- 4750 3050 4650 3050
-$Comp
-L power:GND #PWR010
-U 1 1 5F0DE538
-P 4350 3700
-F 0 "#PWR010" H 4350 3450 50 0001 C CNN
-F 1 "GND" H 4355 3527 50 0000 C CNN
-F 2 "" H 4350 3700 50 0001 C CNN
-F 3 "" H 4350 3700 50 0001 C CNN
- 1 4350 3700
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4350 3700 4350 3650
-Wire Wire Line
- 4100 2700 4900 2700
-Wire Wire Line
- 4900 2700 4900 3250
-Wire Wire Line
- 4900 3250 4650 3250
-Connection ~ 4650 3250
-Connection ~ 3950 2550
-Connection ~ 4100 2700
-Wire Wire Line
- 2650 3650 2650 4000
-Wire Wire Line
- 3450 3650 3450 4000
-Wire Wire Line
- 3450 4000 4250 4000
-Wire Wire Line
- 4250 4000 4250 3650
-Connection ~ 3450 4000
-$Comp
-L Device:C C3
-U 1 1 5F0DE54F
-P 4900 3550
-F 0 "C3" H 5015 3596 50 0000 L CNN
-F 1 "C" H 5015 3505 50 0000 L CNN
-F 2 "" H 4938 3400 50 0001 C CNN
-F 3 "~" H 4900 3550 50 0001 C CNN
- 1 4900 3550
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4900 3400 4900 3250
-Connection ~ 4900 3250
-$Comp
-L power:GND #PWR013
-U 1 1 5F0DE55B
-P 4900 3800
-F 0 "#PWR013" H 4900 3550 50 0001 C CNN
-F 1 "GND" H 4905 3627 50 0000 C CNN
-F 2 "" H 4900 3800 50 0001 C CNN
-F 3 "" H 4900 3800 50 0001 C CNN
- 1 4900 3800
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4900 3800 4900 3700
-$Comp
-L Device:C C6
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-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Battery charger and dual power supply unit</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Authors:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-<ul class="org-ul">
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>Valeria Agejenko
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-<p>
-I needed dual voltage power supply for my lab that runs on mains
-electricity (wall power) and slowly charges attached 12V Lead-Acid
-battery. Lead-acid battery in turn provides high current when needed
-as well as power in portable situations or when mains electricity is
-not available.
-</p>
-
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Power supply provides about 13 Volts and 5 Volts simultaneously.
-</p>
-
-<p>
-!!!WARNING!!! I use USB-A connectors for power output, but IT IS NOT
-COMPATIBLE WITH USB DEVICES AND POSSIBLY WITH EXISTING USB CABLES.
-</p>
-
-<p>
-Normal USB devices and cables should not be plugged in! It would
-damage device/cable and likely power supply.
-</p>
-
-<p>
-I found USB-A connectors to be easily available, cheap, reliable and
-functional, so I re-purposed connector for my own needs but I'm using
-totally incompatible electrical wiring.
-</p>
-
-
-<figure>
-<p><img src="connector%20terminal/USB%20hack.png" class="img-responsive" alt="USB%20hack.png">
-</p>
-</figure>
-
-<p>
-As seen, it has dual voltage output. Additionally one wire is
-dedicated to data transmission and can be used with <a href="https://en.wikipedia.org/wiki/1-Wire">1-wire</a>
-protocol. Power supply simply passively links all data wires together
-but does not participate in communication.
-</p>
-
-<p>
-Power supply uses 3D printed body with lots of holes, for fanless
-cooling.
-</p>
-
-
-<figure>
-<p><img src="body%20and%20covers/body,%201.png" class="img-responsive" alt="body,%201.png">
-</p>
-</figure>
-
-<p>
-Various modules are realized on top of prototype PCBs that slide into
-dedicated rails within the body.
-</p>
-
-
-<figure>
-<p><img src="body%20and%20covers/body,%202.png" class="img-responsive" alt="body,%202.png">
-</p>
-</figure>
-
-<p>
-Like this:
-</p>
-
-
-<figure>
-<p><img src="make,%202.png" class="img-responsive" alt="make,%202.png">
-</p>
-</figure>
-
-<p>
-When cover is closed, it blocks PCB movement:
-</p>
-
-
-<figure>
-<p><img src="body%20and%20covers/cover.png" class="img-responsive" alt="cover.png">
-</p>
-</figure>
-
-<p>
-There is still some empty space inside, so why not add dummy cover on
-top that can be replaced later with add-on functionality/expansion
-board/terminal :)
-</p>
-
-
-<figure>
-<p><img src="body%20and%20covers/cover%20cover.png" class="img-responsive" alt="cover%20cover.png">
-</p>
-</figure>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="body%20and%20covers/body.stl">Body STL file</a>
-</li>
-<li><a href="body%20and%20covers/cover.stl">Big cover STL file</a>
-</li>
-<li><a href="body%20and%20covers/cover%20cover.stl">Small dummy cover on top, STL file</a>
-</li>
-<li><a href="body%20and%20covers/body%20and%20covers.FCStd">Body and covers FreeCAD project</a>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-3" class="outline-2">
-<h2 id="sec-3"><span class="section-number-2">3</span> Transformer and AC to DC converter</h2>
-<div class="outline-text-2" id="text-3">
-<p>
-This is where high voltage from mains electricity enters the system.
-</p>
-
-<p>
-Schematic:
-<img src="transformer%20and%20AC%20DC%20converter%20board/schematic.png" class="img-responsive" alt="schematic.png">
-</p>
-
-<p>
-For safety I kept high voltage section as minimal as possible. That
-is, wall plug runs straight into transformer. Also I used <a href="https://www.amazon.de/gp/product/B07VGQKM3G/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1">UV hardening
-glue</a> for extra safety and isolation on PCB.
-</p>
-
-<p>
-Power on/off switch operates on already reduced voltage of about 30
-volts. Power switch is located on <a href="#sec-6">indicator panel</a>.
-</p>
-
-
-<figure>
-<p><img src="transformer%20and%20AC%20DC%20converter%20board/make,%201.png" class="img-responsive" alt="make,%201.png">
-</p>
-</figure>
-
-<p>
-DC current of about 30 volts is then routed to <a href="#sec-4">Main board</a>.
-</p>
-
-
-<figure>
-<p><img src="transformer%20and%20AC%20DC%20converter%20board/make,%202.png" class="img-responsive" alt="make,%202.png">
-</p>
-</figure>
-
-<p>
-<a href="https://www.amazon.de/gp/product/B07RLQH5TR/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1">Single sided prototype PCB is used</a>.
-</p>
-</div>
-</div>
-
-<div id="outline-container-sec-4" class="outline-2">
-<h2 id="sec-4"><a id="ID-65d68227-4bf2-4c4f-b4d3-c390bc6a9c34" name="ID-65d68227-4bf2-4c4f-b4d3-c390bc6a9c34"></a><span class="section-number-2">4</span> Main board</h2>
-<div class="outline-text-2" id="text-4">
-<p>
-This is logically main board because it appears to be central hub that
-connects all components. It also houses 2 <a href="https://www.amazon.de/gp/product/B072MQYJ93/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1">adjustable DC-DC Step Down
-voltage converters</a>.
-</p>
-
-
-<figure>
-<p><img src="main%20board/main%20board,%201.png" class="img-responsive" alt="main%20board,%201.png">
-</p>
-</figure>
-
-<p>
-High-level schematic of entire device:
-<img src="main%20board/schematic.png" class="img-responsive" alt="schematic.png">
-</p>
-
-<p>
-As seen from schematic, ~30 volts DC from transformer board is routed
-into first step-down converter that reduces it to about 15V. Reduced
-voltage is then directed to <a href="#sec-5">Current limiter circuit</a>. Current limiter
-loses about 2 volts. Now we have current and voltage limited power at
-about 13 volts. This power is used to charge connected 12V Lead-Acid
-battery. Also the same power is routed to <a href="#sec-7">connector terminal</a> to be
-consumed by connected devices.
-</p>
-
-<p>
-As seen from this schematic, device is not meant to provide high
-current for long periods of time. Instead it gets comparatively
-limited current to charge the battery and feed devices with low
-current requirements. Occasional current spikes are backed up by
-battery that stays in use-changing mode.
-</p>
-
-<p>
-Also about 13V output voltage is approximate and depends on connected
-battery charge level.
-</p>
-
-<p>
-Second Step-Down converter reduces voltage even further to quite
-precisely 5V DC. This resulting voltage is also routed to <a href="#sec-7">connector
-terminal</a>.
-</p>
-
-<p>
-Both 13V and 5V lines are also routed to <a href="#sec-6">indicator panel</a> for
-monitoring.
-</p>
-
-<p>
-There is single on/off switch. In off position, it disconnects battery
-and transformer from the system effectively powering everything down.
-</p>
-
-<p>
-On schematic above, some wires are annotated with numbers from 1
-to 13. This corresponds to output pins on the board.
-</p>
-
-
-<figure>
-<p><img src="main%20board/main%20board,%202.png" class="img-responsive" alt="main%20board,%202.png">
-</p>
-</figure>
-</div>
-</div>
-<div id="outline-container-sec-5" class="outline-2">
-<h2 id="sec-5"><a id="ID-afc22d23-9bc4-421c-9cac-e0ce34bd36bc" name="ID-afc22d23-9bc4-421c-9cac-e0ce34bd36bc"></a><span class="section-number-2">5</span> Current limiter</h2>
-<div class="outline-text-2" id="text-5">
-<p>
-Schematic:
-<img src="current%20limiter/schematic.png" class="img-responsive" alt="schematic.png">
-</p>
-
-<p>
-Simple LM317 based current limiter is used. I used 4.7 ohm
-resistor. It provides about 265 milliamps of current. See <a href="http://www.reuk.co.uk/wordpress/electric-circuit/lm317-current-calculator/">calculator</a>.
-</p>
-
-
-<figure>
-<p><img src="current%20limiter/current%20limiter,%201.png" class="img-responsive" alt="current%20limiter,%201.png">
-</p>
-</figure>
-
-<p>
-Thermal paste below and UV hardening glue on top is used to attach
-LM317 to the heatsink. There is also jumper-like solution on top
-right. This is handy to attach multimeter tap to verify/monitor
-current during initial device calibration.
-</p>
-
-<p>
-If attached battery is really empty, significant voltage drop can
-occur in LM317. Heatsink is needed to dissipate that power.
-</p>
-
-
-<figure>
-<p><img src="current%20limiter/current%20limiter,%202.png" class="img-responsive" alt="current%20limiter,%202.png">
-</p>
-</figure>
-
-<p>
-Note: resistor gets hot too.
-</p>
-</div>
-</div>
-
-<div id="outline-container-sec-6" class="outline-2">
-<h2 id="sec-6"><a id="ID-c9a69490-f920-4a31-b32e-b101bfc3d01b" name="ID-c9a69490-f920-4a31-b32e-b101bfc3d01b"></a><span class="section-number-2">6</span> Indicator panel</h2>
-<div class="outline-text-2" id="text-6">
-
-<figure>
-<p><img src="indicator%20panel/indicator%20panel,%201.png" class="img-responsive" alt="indicator%20panel,%201.png">
-</p>
-</figure>
-
-<p>
-Basically 2 digital DC voltmeters and main on/off switch.
-</p>
-
-
-<figure>
-<p><img src="indicator%20panel/indicator%20panel,%202.png" class="img-responsive" alt="indicator%20panel,%202.png">
-</p>
-</figure>
-
-<p>
-Download:
-</p>
-
-
-<figure>
-<p><img src="indicator%20panel/indicator%20panel.png" class="img-responsive" alt="indicator%20panel.png">
-</p>
-</figure>
-
-<ul class="org-ul">
-<li><a href="indicator%20panel/indicator%20panel.stl">STL file</a>
-</li>
-<li><a href="indicator%20panel/indicator%20panel.FCStd">FreeCAD project</a>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-7" class="outline-2">
-<h2 id="sec-7"><a id="ID-e33940bd-652f-4ec0-b53b-1c03e16941c8" name="ID-e33940bd-652f-4ec0-b53b-1c03e16941c8"></a><span class="section-number-2">7</span> Connector terminal</h2>
-<div class="outline-text-2" id="text-7">
-<p>
-Schematic:
-<img src="connector%20terminal/schematic.png" class="img-responsive" alt="schematic.png">
-</p>
-
-<p>
-As seen above, most of the USB connectors are used to deliver dual
-power output and 1-wire data connectivity, except one on the bottom
-right. This is used to attach 12V battery. Some capacitors are thrown
-in as well to stabilize against smaller current spikes.
-</p>
-
-<p>
-Electrically schematic is realized using smaller prototype PCBs.
-</p>
-
-
-<figure>
-<p><img src="connector%20terminal/make,%201.png" class="img-responsive" alt="make,%201.png">
-</p>
-</figure>
-
-
-<p>
-Those PCBs are wired to central small PCB that acts as a hub:
-</p>
-
-
-<figure>
-<p><img src="connector%20terminal/make,%202.png" class="img-responsive" alt="make,%202.png">
-</p>
-</figure>
-
-<p>
-PCBs are held together by being sandwiched between front panel:
-</p>
-
-
-<figure>
-<p><img src="connector%20terminal/front%20panel.png" class="img-responsive" alt="front%20panel.png">
-</p>
-</figure>
-
-<p>
-and smaller back-end plate:
-</p>
-
-
-<figure>
-<p><img src="connector%20terminal/back%20panel.png" class="img-responsive" alt="back%20panel.png">
-</p>
-</figure>
-
-<p>
-Result:
-</p>
-
-
-<figure>
-<p><img src="connector%20terminal/make,%203.png" class="img-responsive" alt="make,%203.png">
-</p>
-</figure>
-
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="connector%20terminal/front%20panel.stl">front panel STL</a>
-</li>
-<li><a href="connector%20terminal/back%20panel.stl">back panel STL</a>
-</li>
-<li><a href="connector%20terminal/connector%20terminal.FCStd">FreeCAD project</a>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-8" class="outline-2">
-<h2 id="sec-8"><span class="section-number-2">8</span> Calibration</h2>
-<div class="outline-text-2" id="text-8">
-<p>
-Since device uses adjustable step-down modules, these need to be
-calibrated to provide correct output voltage. It is important that
-battery receives proper charging voltage otherwise either no charging
-occurs or battery starts gassing out and gets destroyed.
-</p>
-
-<p>
-See here for more details: <a href="https://www.powerstream.com/SLA.htm">https://www.powerstream.com/SLA.htm</a>
-</p>
-
-<hr >
-
-<p>
-Happy building! :)
-</p>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-<li><a href="#sec-3">3. Transformer and AC to DC converter</a></li>
-<li><a href="#sec-4">4. Main board</a></li>
-<li><a href="#sec-5">5. Current limiter</a></li>
-<li><a href="#sec-6">6. Indicator panel</a></li>
-<li><a href="#sec-7">7. Connector terminal</a></li>
-<li><a href="#sec-8">8. Calibration</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-07-12 Sun 02:52</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Battery charger and dual power supply unit
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Authors:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
- - Valeria Agejenko
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-I needed dual voltage power supply for my lab that runs on mains
-electricity (wall power) and slowly charges attached 12V Lead-Acid
-battery. Lead-acid battery in turn provides high current when needed
-as well as power in portable situations or when mains electricity is
-not available.
-
-[[file:make.png]]
-
-Power supply provides about 13 Volts and 5 Volts simultaneously.
-
-!!!WARNING!!! I use USB-A connectors for power output, but IT IS NOT
-COMPATIBLE WITH USB DEVICES AND POSSIBLY WITH EXISTING USB CABLES.
-
-Normal USB devices and cables should not be plugged in! It would
-damage device/cable and likely power supply.
-
-I found USB-A connectors to be easily available, cheap, reliable and
-functional, so I re-purposed connector for my own needs but I'm using
-totally incompatible electrical wiring.
-
-[[file:connector%20terminal/USB%20hack.png]]
-
-As seen, it has dual voltage output. Additionally one wire is
-dedicated to data transmission and can be used with [[https://en.wikipedia.org/wiki/1-Wire][1-wire]]
-protocol. Power supply simply passively links all data wires together
-but does not participate in communication.
-
-Power supply uses 3D printed body with lots of holes, for fanless
-cooling.
-
-[[file:body%20and%20covers/body,%201.png]]
-
-Various modules are realized on top of prototype PCBs that slide into
-dedicated rails within the body.
-
-[[file:body%20and%20covers/body,%202.png]]
-
-Like this:
-
-[[file:make,%202.png]]
-
-When cover is closed, it blocks PCB movement:
-
-[[file:body%20and%20covers/cover.png]]
-
-There is still some empty space inside, so why not add dummy cover on
-top that can be replaced later with add-on functionality/expansion
-board/terminal :)
-
-[[file:body%20and%20covers/cover%20cover.png]]
-
-Download:
-+ [[file:body%20and%20covers/body.stl][Body STL file]]
-+ [[file:body%20and%20covers/cover.stl][Big cover STL file]]
-+ [[file:body%20and%20covers/cover%20cover.stl][Small dummy cover on top, STL file]]
-+ [[file:body%20and%20covers/body%20and%20covers.FCStd][Body and covers FreeCAD project]]
-
-* Transformer and AC to DC converter
-
-This is where high voltage from mains electricity enters the system.
-
-Schematic:
-[[file:transformer%20and%20AC%20DC%20converter%20board/schematic.png]]
-
-For safety I kept high voltage section as minimal as possible. That
-is, wall plug runs straight into transformer. Also I used [[https://www.amazon.de/gp/product/B07VGQKM3G/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1][UV hardening
-glue]] for extra safety and isolation on PCB.
-
-Power on/off switch operates on already reduced voltage of about 30
-volts. Power switch is located on [[id:c9a69490-f920-4a31-b32e-b101bfc3d01b][indicator panel]].
-
-[[file:transformer%20and%20AC%20DC%20converter%20board/make,%201.png]]
-
-DC current of about 30 volts is then routed to [[id:65d68227-4bf2-4c4f-b4d3-c390bc6a9c34][Main board]].
-
-[[file:transformer%20and%20AC%20DC%20converter%20board/make,%202.png]]
-
-[[https://www.amazon.de/gp/product/B07RLQH5TR/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1][Single sided prototype PCB is used]].
-
-* Main board
-:PROPERTIES:
-:ID: 65d68227-4bf2-4c4f-b4d3-c390bc6a9c34
-:END:
-
-This is logically main board because it appears to be central hub that
-connects all components. It also houses 2 [[https://www.amazon.de/gp/product/B072MQYJ93/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1][adjustable DC-DC Step Down
-voltage converters]].
-
-[[file:main%20board/main%20board,%201.png]]
-
-High-level schematic of entire device:
-[[file:main%20board/schematic.png]]
-
-As seen from schematic, ~30 volts DC from transformer board is routed
-into first step-down converter that reduces it to about 15V. Reduced
-voltage is then directed to [[id:afc22d23-9bc4-421c-9cac-e0ce34bd36bc][Current limiter circuit]]. Current limiter
-loses about 2 volts. Now we have current and voltage limited power at
-about 13 volts. This power is used to charge connected 12V Lead-Acid
-battery. Also the same power is routed to [[id:e33940bd-652f-4ec0-b53b-1c03e16941c8][connector terminal]] to be
-consumed by connected devices.
-
-As seen from this schematic, device is not meant to provide high
-current for long periods of time. Instead it gets comparatively
-limited current to charge the battery and feed devices with low
-current requirements. Occasional current spikes are backed up by
-battery that stays in use-changing mode.
-
-Also about 13V output voltage is approximate and depends on connected
-battery charge level.
-
-Second Step-Down converter reduces voltage even further to quite
-precisely 5V DC. This resulting voltage is also routed to [[id:e33940bd-652f-4ec0-b53b-1c03e16941c8][connector
-terminal]].
-
-Both 13V and 5V lines are also routed to [[id:c9a69490-f920-4a31-b32e-b101bfc3d01b][indicator panel]] for
-monitoring.
-
-There is single on/off switch. In off position, it disconnects battery
-and transformer from the system effectively powering everything down.
-
-On schematic above, some wires are annotated with numbers from 1
-to 13. This corresponds to output pins on the board.
-
-[[file:main%20board/main%20board,%202.png]]
-* Current limiter
-:PROPERTIES:
-:ID: afc22d23-9bc4-421c-9cac-e0ce34bd36bc
-:END:
-
-Schematic:
-[[file:current%20limiter/schematic.png]]
-
-Simple LM317 based current limiter is used. I used 4.7 ohm
-resistor. It provides about 265 milliamps of current. See [[http://www.reuk.co.uk/wordpress/electric-circuit/lm317-current-calculator/][calculator]].
-
-[[file:current%20limiter/current%20limiter,%201.png]]
-
-Thermal paste below and UV hardening glue on top is used to attach
-LM317 to the heatsink. There is also jumper-like solution on top
-right. This is handy to attach multimeter tap to verify/monitor
-current during initial device calibration.
-
-If attached battery is really empty, significant voltage drop can
-occur in LM317. Heatsink is needed to dissipate that power.
-
-[[file:current%20limiter/current%20limiter,%202.png]]
-
-Note: resistor gets hot too.
-
-* Indicator panel
-:PROPERTIES:
-:ID: c9a69490-f920-4a31-b32e-b101bfc3d01b
-:END:
-
-[[file:indicator%20panel/indicator%20panel,%201.png]]
-
-Basically 2 digital DC voltmeters and main on/off switch.
-
-[[file:indicator%20panel/indicator%20panel,%202.png]]
-
-Download:
-
-[[file:indicator%20panel/indicator%20panel.png]]
-
-+ [[file:indicator%20panel/indicator%20panel.stl][STL file]]
-+ [[file:indicator%20panel/indicator%20panel.FCStd][FreeCAD project]]
-
-* Connector terminal
-:PROPERTIES:
-:ID: e33940bd-652f-4ec0-b53b-1c03e16941c8
-:END:
-
-Schematic:
-[[file:connector%20terminal/schematic.png]]
-
-As seen above, most of the USB connectors are used to deliver dual
-power output and 1-wire data connectivity, except one on the bottom
-right. This is used to attach 12V battery. Some capacitors are thrown
-in as well to stabilize against smaller current spikes.
-
-Electrically schematic is realized using smaller prototype PCBs.
-
-[[file:connector%20terminal/make,%201.png]]
-
-
-Those PCBs are wired to central small PCB that acts as a hub:
-
-[[file:connector%20terminal/make,%202.png]]
-
-PCBs are held together by being sandwiched between front panel:
-
-[[file:connector%20terminal/front%20panel.png]]
-
-and smaller back-end plate:
-
-[[file:connector%20terminal/back%20panel.png]]
-
-Result:
-
-[[file:connector%20terminal/make,%203.png]]
-
-
-Download:
-+ [[file:connector%20terminal/front%20panel.stl][front panel STL]]
-+ [[file:connector%20terminal/back%20panel.stl][back panel STL]]
-+ [[file:connector%20terminal/connector%20terminal.FCStd][FreeCAD project]]
-
-* Calibration
-
-Since device uses adjustable step-down modules, these need to be
-calibrated to provide correct output voltage. It is important that
-battery receives proper charging voltage otherwise either no charging
-occurs or battery starts gassing out and gets destroyed.
-
-See here for more details: https://www.powerstream.com/SLA.htm
-
------
-
-Happy building! :)
+++ /dev/null
-
-
-Thermistor used: UEI005 (NTC Thermistor)
+++ /dev/null
-EESchema-LIBRARY Version 2.4
-#encoding utf-8
-#
-# Connector_USB_A
-#
-DEF Connector_USB_A J 0 40 Y Y 1 F N
-F0 "J" -200 450 50 H V L CNN
-F1 "Connector_USB_A" -200 350 50 H V L CNN
-F2 "" 150 -50 50 H I C CNN
-F3 "" 150 -50 50 H I C CNN
-$FPLIST
- USB*
-$ENDFPLIST
-DRAW
-C -150 85 25 0 1 10 F
-C -25 135 15 0 1 10 F
-S -200 -300 200 300 0 1 10 f
-S -60 190 -170 210 0 1 0 F
-S -50 180 -180 230 0 1 0 N
-S -5 -300 5 -270 0 1 0 N
-S 10 50 -20 20 0 1 10 F
-S 200 -105 170 -95 0 1 0 N
-S 200 -5 170 5 0 1 0 N
-S 200 195 170 205 0 1 0 N
-P 4 0 1 10 -125 85 -100 85 -50 135 -25 135 N
-P 4 0 1 10 -100 85 -75 85 -50 35 0 35 N
-P 4 0 1 10 25 110 25 60 75 85 25 110 F
-P 2 1 1 10 -75 85 25 85 N
-X VBUS 1 300 200 100 L 50 50 1 1 W
-X D- 2 300 -100 100 L 50 50 1 1 P
-X D+ 3 300 0 100 L 50 50 1 1 P
-X GND 4 0 -400 100 U 50 50 1 1 W
-X Shield 5 -100 -400 100 U 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-# Device_Lamp
-#
-DEF Device_Lamp LA 0 1 N N 1 F N
-F0 "LA" 25 150 50 H V L CNN
-F1 "Device_Lamp" 25 -150 50 H V L CNN
-F2 "" 0 100 50 V I C CNN
-F3 "" 0 100 50 V I C CNN
-DRAW
-C 0 0 100 0 1 0 N
-P 2 0 1 0 -70 70 70 -70 N
-P 2 0 1 0 70 70 -70 -70 N
-X - 1 0 -200 100 U 50 50 1 1 P
-X + 2 0 200 100 D 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-# Device_R
-#
-DEF Device_R R 0 0 N Y 1 F N
-F0 "R" 80 0 50 V V C CNN
-F1 "Device_R" 0 0 50 V V C CNN
-F2 "" -70 0 50 V I C CNN
-F3 "" 0 0 50 H I C CNN
-$FPLIST
- R_*
-$ENDFPLIST
-DRAW
-S -40 -100 40 100 0 1 10 N
-X ~ 1 0 150 50 D 50 50 1 1 P
-X ~ 2 0 -150 50 U 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-# Switch_SW_SPST
-#
-DEF Switch_SW_SPST SW 0 0 Y N 1 F N
-F0 "SW" 0 125 50 H V C CNN
-F1 "Switch_SW_SPST" 0 -100 50 H V C CNN
-F2 "" 0 0 50 H I C CNN
-F3 "" 0 0 50 H I C CNN
-DRAW
-C -80 0 20 0 0 0 N
-C 80 0 20 0 0 0 N
-P 2 0 0 0 -60 10 60 70 N
-X A 1 -200 0 100 R 50 50 1 1 P
-X B 2 200 0 100 L 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-#End Library
+++ /dev/null
-(kicad_pcb (version 4) (host kicad "dummy file") )
+++ /dev/null
-update=22/05/2015 07:44:53
-version=1
-last_client=kicad
-[general]
-version=1
-RootSch=
-BoardNm=
-[pcbnew]
-version=1
-LastNetListRead=
-UseCmpFile=1
-PadDrill=0.600000000000
-PadDrillOvalY=0.600000000000
-PadSizeH=1.500000000000
-PadSizeV=1.500000000000
-PcbTextSizeV=1.500000000000
-PcbTextSizeH=1.500000000000
-PcbTextThickness=0.300000000000
-ModuleTextSizeV=1.000000000000
-ModuleTextSizeH=1.000000000000
-ModuleTextSizeThickness=0.150000000000
-SolderMaskClearance=0.000000000000
-SolderMaskMinWidth=0.000000000000
-DrawSegmentWidth=0.200000000000
-BoardOutlineThickness=0.100000000000
-ModuleOutlineThickness=0.150000000000
-[cvpcb]
-version=1
-NetIExt=net
-[eeschema]
-version=1
-LibDir=
-[eeschema/libraries]
+++ /dev/null
-EESchema Schematic File Version 4
-EELAYER 30 0
-EELAYER END
-$Descr A4 11693 8268
-encoding utf-8
-Sheet 1 1
-Title ""
-Date ""
-Rev ""
-Comp ""
-Comment1 ""
-Comment2 ""
-Comment3 ""
-Comment4 ""
-$EndDescr
-$Comp
-L Connector:USB_A J1
-U 1 1 5F4101A8
-P 4150 3000
-F 0 "J1" H 4207 3467 50 0000 C CNN
-F 1 "USB_A" H 4207 3376 50 0000 C CNN
-F 2 "" H 4300 2950 50 0001 C CNN
-F 3 " ~" H 4300 2950 50 0001 C CNN
- 1 4150 3000
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4450 3100 4550 3100
-Wire Wire Line
- 4550 3000 4450 3000
-$Comp
-L Switch:SW_SPST SW3
-U 1 1 5F410F20
-P 4750 4400
-F 0 "SW3" H 4750 4635 50 0000 C CNN
-F 1 "SW_SPST" H 4750 4544 50 0000 C CNN
-F 2 "" H 4750 4400 50 0001 C CNN
-F 3 "~" H 4750 4400 50 0001 C CNN
- 1 4750 4400
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:R R2
-U 1 1 5F411557
-P 4750 4650
-F 0 "R2" V 4543 4650 50 0000 C CNN
-F 1 "8" V 4634 4650 50 0000 C CNN
-F 2 "" V 4680 4650 50 0001 C CNN
-F 3 "~" H 4750 4650 50 0001 C CNN
- 1 4750 4650
- 0 1 1 0
-$EndComp
-Wire Wire Line
- 4550 4400 4550 4650
-Wire Wire Line
- 4550 4650 4600 4650
-$Comp
-L Switch:SW_SPST SW6
-U 1 1 5F4130F6
-P 5250 4400
-F 0 "SW6" H 5250 4635 50 0000 C CNN
-F 1 "SW_SPST" H 5250 4544 50 0000 C CNN
-F 2 "" H 5250 4400 50 0001 C CNN
-F 3 "~" H 5250 4400 50 0001 C CNN
- 1 5250 4400
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:R R4
-U 1 1 5F413100
-P 5250 4650
-F 0 "R4" V 5043 4650 50 0000 C CNN
-F 1 "4" V 5134 4650 50 0000 C CNN
-F 2 "" V 5180 4650 50 0001 C CNN
-F 3 "~" H 5250 4650 50 0001 C CNN
- 1 5250 4650
- 0 1 1 0
-$EndComp
-Wire Wire Line
- 5000 4650 5100 4650
-Wire Wire Line
- 4950 4400 5000 4400
-Wire Wire Line
- 5000 4400 5000 4650
-Connection ~ 5000 4400
-Wire Wire Line
- 5000 4400 5050 4400
-Wire Wire Line
- 4900 4650 5000 4650
-Connection ~ 5000 4650
-$Comp
-L Switch:SW_SPST SW9
-U 1 1 5F416C6C
-P 5750 4400
-F 0 "SW9" H 5750 4635 50 0000 C CNN
-F 1 "SW_SPST" H 5750 4544 50 0000 C CNN
-F 2 "" H 5750 4400 50 0001 C CNN
-F 3 "~" H 5750 4400 50 0001 C CNN
- 1 5750 4400
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:R R6
-U 1 1 5F416C76
-P 5750 4650
-F 0 "R6" V 5543 4650 50 0000 C CNN
-F 1 "2" V 5634 4650 50 0000 C CNN
-F 2 "" V 5680 4650 50 0001 C CNN
-F 3 "~" H 5750 4650 50 0001 C CNN
- 1 5750 4650
- 0 1 1 0
-$EndComp
-Wire Wire Line
- 5500 4650 5600 4650
-Wire Wire Line
- 5450 4400 5500 4400
-Wire Wire Line
- 5500 4400 5500 4650
-Connection ~ 5500 4400
-Wire Wire Line
- 5500 4400 5550 4400
-Wire Wire Line
- 5400 4650 5500 4650
-Connection ~ 5500 4650
-$Comp
-L Switch:SW_SPST SW12
-U 1 1 5F41B671
-P 6250 4400
-F 0 "SW12" H 6250 4635 50 0000 C CNN
-F 1 "SW_SPST" H 6250 4544 50 0000 C CNN
-F 2 "" H 6250 4400 50 0001 C CNN
-F 3 "~" H 6250 4400 50 0001 C CNN
- 1 6250 4400
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:R R8
-U 1 1 5F41B67B
-P 6250 4650
-F 0 "R8" V 6043 4650 50 0000 C CNN
-F 1 "1" V 6134 4650 50 0000 C CNN
-F 2 "" V 6180 4650 50 0001 C CNN
-F 3 "~" H 6250 4650 50 0001 C CNN
- 1 6250 4650
- 0 1 1 0
-$EndComp
-$Comp
-L Switch:SW_SPST SW15
-U 1 1 5F41B686
-P 6750 4400
-F 0 "SW15" H 6750 4635 50 0000 C CNN
-F 1 "SW_SPST" H 6750 4544 50 0000 C CNN
-F 2 "" H 6750 4400 50 0001 C CNN
-F 3 "~" H 6750 4400 50 0001 C CNN
- 1 6750 4400
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:R R11
-U 1 1 5F41B690
-P 6750 4650
-F 0 "R11" V 6543 4650 50 0000 C CNN
-F 1 "0.5" V 6634 4650 50 0000 C CNN
-F 2 "" V 6680 4650 50 0001 C CNN
-F 3 "~" H 6750 4650 50 0001 C CNN
- 1 6750 4650
- 0 1 1 0
-$EndComp
-Wire Wire Line
- 6500 4650 6600 4650
-Wire Wire Line
- 6450 4400 6500 4400
-Wire Wire Line
- 6500 4400 6500 4650
-Connection ~ 6500 4400
-Wire Wire Line
- 6500 4400 6550 4400
-Wire Wire Line
- 6400 4650 6500 4650
-Connection ~ 6500 4650
-Wire Wire Line
- 6950 4400 7000 4400
-Wire Wire Line
- 7000 4400 7000 4650
-Wire Wire Line
- 6900 4650 7000 4650
-Wire Wire Line
- 5900 4650 6000 4650
-Wire Wire Line
- 5950 4400 6000 4400
-Wire Wire Line
- 6000 4400 6000 4650
-Connection ~ 6000 4400
-Wire Wire Line
- 6000 4400 6050 4400
-Connection ~ 6000 4650
-Wire Wire Line
- 6000 4650 6100 4650
-$Comp
-L Switch:SW_SPST SW2
-U 1 1 5F42FD9A
-P 4750 3550
-F 0 "SW2" H 4750 3785 50 0000 C CNN
-F 1 "SW_SPST" H 4750 3694 50 0000 C CNN
-F 2 "" H 4750 3550 50 0001 C CNN
-F 3 "~" H 4750 3550 50 0001 C CNN
- 1 4750 3550
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:R R1
-U 1 1 5F42FDA4
-P 4750 3800
-F 0 "R1" V 4543 3800 50 0000 C CNN
-F 1 "256" V 4634 3800 50 0000 C CNN
-F 2 "" V 4680 3800 50 0001 C CNN
-F 3 "~" H 4750 3800 50 0001 C CNN
- 1 4750 3800
- 0 1 1 0
-$EndComp
-Wire Wire Line
- 4550 3550 4550 3800
-Wire Wire Line
- 4550 3800 4600 3800
-$Comp
-L Switch:SW_SPST SW5
-U 1 1 5F42FDB0
-P 5250 3550
-F 0 "SW5" H 5250 3785 50 0000 C CNN
-F 1 "SW_SPST" H 5250 3694 50 0000 C CNN
-F 2 "" H 5250 3550 50 0001 C CNN
-F 3 "~" H 5250 3550 50 0001 C CNN
- 1 5250 3550
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:R R3
-U 1 1 5F42FDBA
-P 5250 3800
-F 0 "R3" V 5043 3800 50 0000 C CNN
-F 1 "128" V 5134 3800 50 0000 C CNN
-F 2 "" V 5180 3800 50 0001 C CNN
-F 3 "~" H 5250 3800 50 0001 C CNN
- 1 5250 3800
- 0 1 1 0
-$EndComp
-Wire Wire Line
- 5000 3800 5100 3800
-Wire Wire Line
- 4950 3550 5000 3550
-Wire Wire Line
- 5000 3550 5000 3800
-Connection ~ 5000 3550
-Wire Wire Line
- 5000 3550 5050 3550
-Wire Wire Line
- 4900 3800 5000 3800
-Connection ~ 5000 3800
-$Comp
-L Switch:SW_SPST SW8
-U 1 1 5F42FDCB
-P 5750 3550
-F 0 "SW8" H 5750 3785 50 0000 C CNN
-F 1 "SW_SPST" H 5750 3694 50 0000 C CNN
-F 2 "" H 5750 3550 50 0001 C CNN
-F 3 "~" H 5750 3550 50 0001 C CNN
- 1 5750 3550
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:R R5
-U 1 1 5F42FDD5
-P 5750 3800
-F 0 "R5" V 5543 3800 50 0000 C CNN
-F 1 "64" V 5634 3800 50 0000 C CNN
-F 2 "" V 5680 3800 50 0001 C CNN
-F 3 "~" H 5750 3800 50 0001 C CNN
- 1 5750 3800
- 0 1 1 0
-$EndComp
-Wire Wire Line
- 5500 3800 5600 3800
-Wire Wire Line
- 5450 3550 5500 3550
-Wire Wire Line
- 5500 3550 5500 3800
-Connection ~ 5500 3550
-Wire Wire Line
- 5500 3550 5550 3550
-Wire Wire Line
- 5400 3800 5500 3800
-Connection ~ 5500 3800
-$Comp
-L Switch:SW_SPST SW11
-U 1 1 5F42FDE6
-P 6250 3550
-F 0 "SW11" H 6250 3785 50 0000 C CNN
-F 1 "SW_SPST" H 6250 3694 50 0000 C CNN
-F 2 "" H 6250 3550 50 0001 C CNN
-F 3 "~" H 6250 3550 50 0001 C CNN
- 1 6250 3550
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:R R7
-U 1 1 5F42FDF0
-P 6250 3800
-F 0 "R7" V 6043 3800 50 0000 C CNN
-F 1 "32" V 6134 3800 50 0000 C CNN
-F 2 "" V 6180 3800 50 0001 C CNN
-F 3 "~" H 6250 3800 50 0001 C CNN
- 1 6250 3800
- 0 1 1 0
-$EndComp
-$Comp
-L Switch:SW_SPST SW14
-U 1 1 5F42FDFA
-P 6750 3550
-F 0 "SW14" H 6750 3785 50 0000 C CNN
-F 1 "SW_SPST" H 6750 3694 50 0000 C CNN
-F 2 "" H 6750 3550 50 0001 C CNN
-F 3 "~" H 6750 3550 50 0001 C CNN
- 1 6750 3550
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:R R10
-U 1 1 5F42FE04
-P 6750 3800
-F 0 "R10" V 6543 3800 50 0000 C CNN
-F 1 "16" V 6634 3800 50 0000 C CNN
-F 2 "" V 6680 3800 50 0001 C CNN
-F 3 "~" H 6750 3800 50 0001 C CNN
- 1 6750 3800
- 0 1 1 0
-$EndComp
-Wire Wire Line
- 6500 3800 6600 3800
-Wire Wire Line
- 6450 3550 6500 3550
-Wire Wire Line
- 6500 3550 6500 3800
-Connection ~ 6500 3550
-Wire Wire Line
- 6500 3550 6550 3550
-Wire Wire Line
- 6400 3800 6500 3800
-Connection ~ 6500 3800
-Wire Wire Line
- 6950 3550 7000 3550
-Wire Wire Line
- 7000 3550 7000 3800
-Wire Wire Line
- 6900 3800 7000 3800
-Wire Wire Line
- 5900 3800 6000 3800
-Wire Wire Line
- 5950 3550 6000 3550
-Wire Wire Line
- 6000 3550 6000 3800
-Connection ~ 6000 3550
-Wire Wire Line
- 6000 3550 6050 3550
-Connection ~ 6000 3800
-Wire Wire Line
- 6000 3800 6100 3800
-$Comp
-L Switch:SW_SPST SW1
-U 1 1 5F4459DA
-P 4750 2750
-F 0 "SW1" H 4750 2985 50 0000 C CNN
-F 1 "SW_SPST" H 4750 2894 50 0000 C CNN
-F 2 "" H 4750 2750 50 0001 C CNN
-F 3 "~" H 4750 2750 50 0001 C CNN
- 1 4750 2750
- 1 0 0 -1
-$EndComp
-$Comp
-L Switch:SW_SPST SW4
-U 1 1 5F4459F0
-P 5250 2750
-F 0 "SW4" H 5250 2985 50 0000 C CNN
-F 1 "SW_SPST" H 5250 2894 50 0000 C CNN
-F 2 "" H 5250 2750 50 0001 C CNN
-F 3 "~" H 5250 2750 50 0001 C CNN
- 1 5250 2750
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4950 2750 5000 2750
-Wire Wire Line
- 5000 2750 5000 3000
-Connection ~ 5000 2750
-Wire Wire Line
- 5000 2750 5050 2750
-$Comp
-L Switch:SW_SPST SW7
-U 1 1 5F445A0B
-P 5750 2750
-F 0 "SW7" H 5750 2985 50 0000 C CNN
-F 1 "SW_SPST" H 5750 2894 50 0000 C CNN
-F 2 "" H 5750 2750 50 0001 C CNN
-F 3 "~" H 5750 2750 50 0001 C CNN
- 1 5750 2750
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 5450 2750 5500 2750
-Wire Wire Line
- 5500 2750 5500 3000
-Connection ~ 5500 2750
-Wire Wire Line
- 5500 2750 5550 2750
-$Comp
-L Switch:SW_SPST SW10
-U 1 1 5F445A26
-P 6250 2750
-F 0 "SW10" H 6250 2985 50 0000 C CNN
-F 1 "SW_SPST" H 6250 2894 50 0000 C CNN
-F 2 "" H 6250 2750 50 0001 C CNN
-F 3 "~" H 6250 2750 50 0001 C CNN
- 1 6250 2750
- 1 0 0 -1
-$EndComp
-$Comp
-L Switch:SW_SPST SW13
-U 1 1 5F445A3A
-P 6750 2750
-F 0 "SW13" H 6750 2985 50 0000 C CNN
-F 1 "SW_SPST" H 6750 2894 50 0000 C CNN
-F 2 "" H 6750 2750 50 0001 C CNN
-F 3 "~" H 6750 2750 50 0001 C CNN
- 1 6750 2750
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:R R9
-U 1 1 5F445A44
-P 6750 3000
-F 0 "R9" V 6543 3000 50 0000 C CNN
-F 1 "512" V 6634 3000 50 0000 C CNN
-F 2 "" V 6680 3000 50 0001 C CNN
-F 3 "~" H 6750 3000 50 0001 C CNN
- 1 6750 3000
- 0 1 1 0
-$EndComp
-Wire Wire Line
- 6500 3000 6600 3000
-Wire Wire Line
- 6450 2750 6500 2750
-Wire Wire Line
- 6500 2750 6500 3000
-Connection ~ 6500 2750
-Wire Wire Line
- 6500 2750 6550 2750
-Wire Wire Line
- 6950 2750 7000 2750
-Wire Wire Line
- 7000 2750 7000 3000
-Wire Wire Line
- 6900 3000 7000 3000
-Wire Wire Line
- 5950 2750 6000 2750
-Wire Wire Line
- 6000 2750 6000 3000
-Connection ~ 6000 2750
-Wire Wire Line
- 6000 2750 6050 2750
-$Comp
-L Device:Lamp LA4
-U 1 1 5F459AA3
-P 6250 3000
-F 0 "LA4" V 5985 3000 50 0000 C CNN
-F 1 "Lamp" V 6076 3000 50 0000 C CNN
-F 2 "" V 6250 3100 50 0001 C CNN
-F 3 "~" V 6250 3100 50 0001 C CNN
- 1 6250 3000
- 0 1 1 0
-$EndComp
-Wire Wire Line
- 6450 3000 6500 3000
-Connection ~ 6500 3000
-Wire Wire Line
- 6050 3000 6000 3000
-$Comp
-L Device:Lamp LA3
-U 1 1 5F48104F
-P 5750 3000
-F 0 "LA3" V 5485 3000 50 0000 C CNN
-F 1 "Lamp" V 5576 3000 50 0000 C CNN
-F 2 "" V 5750 3100 50 0001 C CNN
-F 3 "~" V 5750 3100 50 0001 C CNN
- 1 5750 3000
- 0 1 1 0
-$EndComp
-$Comp
-L Device:Lamp LA2
-U 1 1 5F4819AC
-P 5250 3000
-F 0 "LA2" V 4985 3000 50 0000 C CNN
-F 1 "Lamp" V 5076 3000 50 0000 C CNN
-F 2 "" V 5250 3100 50 0001 C CNN
-F 3 "~" V 5250 3100 50 0001 C CNN
- 1 5250 3000
- 0 1 1 0
-$EndComp
-$Comp
-L Device:Lamp LA1
-U 1 1 5F482195
-P 4750 3000
-F 0 "LA1" V 4485 3000 50 0000 C CNN
-F 1 "Lamp" V 4576 3000 50 0000 C CNN
-F 2 "" V 4750 3100 50 0001 C CNN
-F 3 "~" V 4750 3100 50 0001 C CNN
- 1 4750 3000
- 0 1 1 0
-$EndComp
-Wire Wire Line
- 4950 3000 5000 3000
-Wire Wire Line
- 5000 3000 5050 3000
-Connection ~ 5000 3000
-Wire Wire Line
- 5450 3000 5500 3000
-Wire Wire Line
- 5500 3000 5550 3000
-Connection ~ 5500 3000
-Wire Wire Line
- 5950 3000 6000 3000
-Connection ~ 6000 3000
-Wire Wire Line
- 4550 4400 4550 4000
-Wire Wire Line
- 4550 4000 7000 4000
-Wire Wire Line
- 7000 4000 7000 3800
-Connection ~ 4550 4400
-Connection ~ 7000 3800
-Wire Wire Line
- 4550 3550 4550 3200
-Wire Wire Line
- 4550 3200 7000 3200
-Wire Wire Line
- 7000 3200 7000 3000
-Connection ~ 4550 3550
-Connection ~ 7000 3000
-Wire Wire Line
- 4550 3100 4550 3000
-Wire Wire Line
- 4550 3000 4550 2750
-Wire Wire Line
- 7000 4900 7000 4650
-Connection ~ 7000 4650
-Connection ~ 4550 3000
-Wire Wire Line
- 7000 4900 4050 4900
-Wire Wire Line
- 4050 4900 4050 3400
-$EndSCHEMATC
+++ /dev/null
-EESchema Schematic File Version 4
-EELAYER 30 0
-EELAYER END
-$Descr A4 11693 8268
-encoding utf-8
-Sheet 1 1
-Title ""
-Date ""
-Rev ""
-Comp ""
-Comment1 ""
-Comment2 ""
-Comment3 ""
-Comment4 ""
-$EndDescr
-$Comp
-L Connector:USB_A J1
-U 1 1 5F4101A8
-P 3850 3350
-F 0 "J1" H 3907 3817 50 0000 C CNN
-F 1 "USB_A" H 3907 3726 50 0000 C CNN
-F 2 "" H 4000 3300 50 0001 C CNN
-F 3 " ~" H 4000 3300 50 0001 C CNN
- 1 3850 3350
- 1 0 0 -1
-$EndComp
-Wire Wire Line
- 4150 3450 4250 3450
-Wire Wire Line
- 4250 3350 4150 3350
-$Comp
-L Switch:SW_SPST SW3
-U 1 1 5F410F20
-P 4750 4400
-F 0 "SW3" H 4750 4635 50 0000 C CNN
-F 1 "SW_SPST" H 4750 4544 50 0000 C CNN
-F 2 "" H 4750 4400 50 0001 C CNN
-F 3 "~" H 4750 4400 50 0001 C CNN
- 1 4750 4400
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:R R2
-U 1 1 5F411557
-P 4750 4650
-F 0 "R2" V 4543 4650 50 0000 C CNN
-F 1 "8" V 4634 4650 50 0000 C CNN
-F 2 "" V 4680 4650 50 0001 C CNN
-F 3 "~" H 4750 4650 50 0001 C CNN
- 1 4750 4650
- 0 1 1 0
-$EndComp
-Wire Wire Line
- 4550 4400 4550 4650
-Wire Wire Line
- 4550 4650 4600 4650
-$Comp
-L Switch:SW_SPST SW6
-U 1 1 5F4130F6
-P 5250 4400
-F 0 "SW6" H 5250 4635 50 0000 C CNN
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-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Adjustable resistor / indicator</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-<ul class="org-ul">
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-<p>
-I needed a way to experimentally find resistance that works best in
-certain circuits. Usual potentiometers could not handle required power
-dissipation and were not precise enough.
-</p>
-
-<p>
-Solution is to build adjustable resistor:
-</p>
-
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-<p>
-Logically there is series of resistors that increase in resistance in
-the power of 2: 0.5, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512. Each
-resistor can be enabled or disabled by a switch. This makes entire
-range of 0 – 1023.5 ohms available with the 0.5 ohms precision.
-</p>
-
-<p>
-Schematic:
-<img src="schematic.png" class="img-responsive" alt="schematic.png">
-</p>
-
-<p>
-Here is front panel for switches:
-<img src="front%20panel.png" class="img-responsive" alt="front%20panel.png">
-</p>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="front%20panel.FCStd">FreeCAD project</a>
-</li>
-<li><a href="front%20panel.stl">STL file</a>
-</li>
-</ul>
-
-<p>
-Sometimes I would like to use lightbulbs with various parameters as
-test load/indicator. Current device has 4 of them included.
-</p>
-
-<p>
-Here is front panel for light bulbs:
-<img src="indicator%20panel.png" class="img-responsive" alt="indicator%20panel.png">
-</p>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="indicator%20panel.FCStd">FreeCAD project</a>
-</li>
-<li><a href="indicator%20panel.stl">STL file</a>
-</li>
-</ul>
-
-
-<p>
-After assembly using prototype PCB:
-<img src="make,%202.png" class="img-responsive" alt="make,%202.png">
-</p>
-
-
-<p>
-Following body is used as a case and PCB support:
-<img src="body.png" class="img-responsive" alt="body.png">
-</p>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="body%20and%20back%20cover.FCStd">FreeCAD project (body + back cover)</a>
-</li>
-<li><a href="body.stl">STL file for body</a>
-</li>
-</ul>
-
-<p>
-Result:
-<img src="make,%203.png" class="img-responsive" alt="make,%203.png">
-</p>
-
-<p>
-Cover on the back:
-<img src="back%20cover.png" class="img-responsive" alt="back%20cover.png">
-</p>
-
-<p>
-Download: <a href="back%20cover.stl">STL file</a>
-</p>
-
-<p>
-Button covers:
-<img src="button.png" class="img-responsive" alt="button.png">
-</p>
-
-<p>
-Download:
-</p>
-<ul class="org-ul">
-<li><a href="button.FCStd">FreeCAD project</a>
-</li>
-<li><a href="button.stl">STL file</a>
-</li>
-</ul>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-08-22 L 15:39</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: Adjustable resistor / indicator
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-I needed a way to experimentally find resistance that works best in
-certain circuits. Usual potentiometers could not handle required power
-dissipation and were not precise enough.
-
-Solution is to build adjustable resistor:
-
-[[file:make.png]]
-
-Logically there is series of resistors that increase in resistance in
-the power of 2: 0.5, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512. Each
-resistor can be enabled or disabled by a switch. This makes entire
-range of 0 -- 1023.5 ohms available with the 0.5 ohms precision.
-
-Schematic:
-[[file:schematic.png]]
-
-Here is front panel for switches:
-[[file:front%20panel.png]]
-
-Download:
-+ [[file:front%20panel.FCStd][FreeCAD project]]
-+ [[file:front%20panel.stl][STL file]]
-
-Sometimes I would like to use lightbulbs with various parameters as
-test load/indicator. Current device has 4 of them included.
-
-Here is front panel for light bulbs:
-[[file:indicator%20panel.png]]
-
-Download:
-+ [[file:indicator%20panel.FCStd][FreeCAD project]]
-+ [[file:indicator%20panel.stl][STL file]]
-
-
-After assembly using prototype PCB:
-[[file:make,%202.png]]
-
-
-Following body is used as a case and PCB support:
-[[file:body.png]]
-
-Download:
-+ [[file:body%20and%20back%20cover.FCStd][FreeCAD project (body + back cover)]]
-+ [[file:body.stl][STL file for body]]
-
-Result:
-[[file:make,%203.png]]
-
-Cover on the back:
-[[file:back%20cover.png]]
-
-Download: [[file:back%20cover.stl][STL file]]
-
-Button covers:
-[[file:button.png]]
-
-Download:
-+ [[file:button.FCStd][FreeCAD project]]
-+ [[file:button.stl][STL file]]
+++ /dev/null
-<!doctype html>
-<html lang="en">
-<head>
-<title>AA and AAA battery tester</title>
-<!-- 2020-05-24 P 23:55 -->
-<meta charset="utf-8">
-<meta name="viewport" content="width=device-width, initial-scale=1">
-<meta name="generator" content="Org-mode">
-<meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-<style type="text/css">
-footer {background-color: #111 !important;}
-pre {background-color: #111; color: #ccc;}
-</style>
-<style type="text/css">
-/* org mode styles on top of twbs */
-
-html {
- position: relative;
- min-height: 100%;
-}
-
-body {
- font-size: 18px;
- margin-bottom: 105px;
-}
-
-footer {
- position: absolute;
- bottom: 0;
- width: 100%;
- height: 101px;
- background-color: #f5f5f5;
-}
-
-footer > div {
- padding: 10px;
-}
-
-footer p {
- margin: 0 0 5px;
- text-align: center;
- font-size: 16px;
-}
-
-#table-of-contents {
- margin-top: 20px;
- margin-bottom: 20px;
-}
-
-blockquote p {
- font-size: 18px;
-}
-
-pre {
- font-size: 16px;
-}
-
-.footpara {
- display: inline-block;
-}
-
-figcaption {
- font-size: 16px;
- color: #666;
- font-style: italic;
- padding-bottom: 15px;
-}
-
-/* from twbs docs */
-
-.bs-docs-sidebar.affix {
- position: static;
-}
-@media (min-width: 768px) {
- .bs-docs-sidebar {
- padding-left: 20px;
- }
-}
-
-/* All levels of nav */
-.bs-docs-sidebar .nav > li > a {
- display: block;
- padding: 4px 20px;
- font-size: 14px;
- font-weight: 500;
- color: #999;
-}
-.bs-docs-sidebar .nav > li > a:hover,
-.bs-docs-sidebar .nav > li > a:focus {
- padding-left: 19px;
- color: #A1283B;
- text-decoration: none;
- background-color: transparent;
- border-left: 1px solid #A1283B;
-}
-.bs-docs-sidebar .nav > .active > a,
-.bs-docs-sidebar .nav > .active:hover > a,
-.bs-docs-sidebar .nav > .active:focus > a {
- padding-left: 18px;
- font-weight: bold;
- color: #A1283B;
- background-color: transparent;
- border-left: 2px solid #A1283B;
-}
-
-/* Nav: second level (shown on .active) */
-.bs-docs-sidebar .nav .nav {
- display: none; /* Hide by default, but at >768px, show it */
- padding-bottom: 10px;
-}
-.bs-docs-sidebar .nav .nav > li > a {
- padding-top: 1px;
- padding-bottom: 1px;
- padding-left: 30px;
- font-size: 12px;
- font-weight: normal;
-}
-.bs-docs-sidebar .nav .nav > li > a:hover,
-.bs-docs-sidebar .nav .nav > li > a:focus {
- padding-left: 29px;
-}
-.bs-docs-sidebar .nav .nav > .active > a,
-.bs-docs-sidebar .nav .nav > .active:hover > a,
-.bs-docs-sidebar .nav .nav > .active:focus > a {
- padding-left: 28px;
- font-weight: 500;
-}
-
-/* Nav: third level (shown on .active) */
-.bs-docs-sidebar .nav .nav .nav {
- padding-bottom: 10px;
-}
-.bs-docs-sidebar .nav .nav .nav > li > a {
- padding-top: 1px;
- padding-bottom: 1px;
- padding-left: 40px;
- font-size: 12px;
- font-weight: normal;
-}
-.bs-docs-sidebar .nav .nav .nav > li > a:hover,
-.bs-docs-sidebar .nav .nav .nav > li > a:focus {
- padding-left: 39px;
-}
-.bs-docs-sidebar .nav .nav .nav > .active > a,
-.bs-docs-sidebar .nav .nav .nav > .active:hover > a,
-.bs-docs-sidebar .nav .nav .nav > .active:focus > a {
- padding-left: 38px;
- font-weight: 500;
-}
-
-/* Show and affix the side nav when space allows it */
-@media (min-width: 992px) {
- .bs-docs-sidebar .nav > .active > ul {
- display: block;
- }
- /* Widen the fixed sidebar */
- .bs-docs-sidebar.affix,
- .bs-docs-sidebar.affix-bottom {
- width: 213px;
- }
- .bs-docs-sidebar.affix {
- position: fixed; /* Undo the static from mobile first approach */
- top: 20px;
- }
- .bs-docs-sidebar.affix-bottom {
- position: absolute; /* Undo the static from mobile first approach */
- }
- .bs-docs-sidebar.affix .bs-docs-sidenav,.bs-docs-sidebar.affix-bottom .bs-docs-sidenav {
- margin-top: 0;
- margin-bottom: 0
- }
-}
-@media (min-width: 1200px) {
- /* Widen the fixed sidebar again */
- .bs-docs-sidebar.affix-bottom,
- .bs-docs-sidebar.affix {
- width: 263px;
- }
-}
-</style>
-<script type="text/javascript">
-$(function() {
- 'use strict';
-
- $('.bs-docs-sidebar li').first().addClass('active');
-
- $(document.body).scrollspy({target: '.bs-docs-sidebar'});
-
- $('.bs-docs-sidebar').affix();
-});
-</script>
-</head>
-<body>
-<div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">AA and AAA battery tester</h1>
-
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
-<div class="outline-text-2" id="text-1">
-<ul class="org-ul">
-<li>DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
-COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
-DESIGNS AT YOUR OWN RISK.
-</li>
-
-<li>This design is released under Creative Commons Zero (CC0) license.
-</li>
-
-<li>Author:
-<ul class="org-ul">
-<li>Svjatoslav Agejenko
-</li>
-<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a>
-</li>
-<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">svjatoslav@svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-
-<li>See also:
-<ul class="org-ul">
-<li><a href="../../index.html">Other physical projects in this repository</a>
-</li>
-<li><a href="https://www.svjatoslav.eu/projects/">Other projects hosted at svjatoslav.eu</a>
-</li>
-</ul>
-</li>
-</ul>
-</div>
-</div>
-
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Project description</h2>
-<div class="outline-text-2" id="text-2">
-
-<figure>
-<p><img src="make.png" class="img-responsive" alt="make.png">
-</p>
-</figure>
-
-
-<figure>
-<p><img src="make,%202.png" class="img-responsive" alt="make,%202.png">
-</p>
-</figure>
-
-<p>
-Simple rechargeable Ni-MH battery tester. The problem with those
-batteries is: right after you take them out of charger, voltage level
-at their terminals is good. But some old batteries will get
-empty/discharged way too quickly under normal load. This device is
-intended to discover old batteries with reduced capacity.
-</p>
-
-<p>
-Freshly charged batteries are tested under high load for short time by
-shorting battery + and - terminals using 5 ohm power resistor
-(R1). Simultaneously battery voltage is being measured while under
-load.
-</p>
-
-
-<figure>
-<p><img src="electrical%20schematic.png" class="img-responsive" alt="electrical%20schematic.png">
-</p>
-</figure>
-
-<p>
-I use vintage analog voltmeter. Instead of power resistor I use
-Nichrome resistance wire. Test/measurement button should not be
-pressed for long because power resistor gets hot quickly and battery
-is being quickly depleted during measurement.
-</p>
-
-
-<figure>
-<p><img src="assembly.png" class="img-responsive" alt="assembly.png">
-</p>
-</figure>
-
-<ul class="org-ul">
-<li>Body: <img src="body.png" class="img-responsive" alt="body.png">
-</li>
-<li>Cover: <img src="cover.png" class="img-responsive" alt="cover.png">
-</li>
-
-<li>Download:
-<ul class="org-ul">
-<li><a href="bodyAndCover.FCStd">FreeCAD project</a>
-</li>
-<li><a href="body.stl">body STL file</a>
-</li>
-<li><a href="cover.stl">cover STL file</a>
-</li>
-</ul>
-</li>
-
-<li>PS: While this device is interesting to build, still you can just
-use ordinary ammeter that can handle battery generated current.
-</li>
-</ul>
-</div>
-</div>
-</div><div class="col-md-3"><nav id="table-of-contents">
-<div id="text-table-of-contents" class="bs-docs-sidebar">
-<ul class="nav">
-<li><a href="#sec-1">1. General</a></li>
-<li><a href="#sec-2">2. Project description</a></li>
-</ul>
-</div>
-</nav>
-</div></div></div>
-<footer id="postamble" class="">
-<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-05-24 P 23:55</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
-</div>
-</footer>
-</body>
-</html>
+++ /dev/null
-#+TITLE: AA and AAA battery tester
-#+AUTHOR: Svjatoslav Agejenko
-#+LANGUAGE: en
-
-* (document settings) :noexport:
-** use dark style for TWBS-HTML exporter
-#+HTML_HEAD: <link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
-#+HTML_HEAD: <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
-#+HTML_HEAD: <style type="text/css">
-#+HTML_HEAD: footer {background-color: #111 !important;}
-#+HTML_HEAD: pre {background-color: #111; color: #ccc;}
-#+HTML_HEAD: </style>
-
-* General
-+ DISCLAIMER: I DO ELECTRONICS AND 3D DESIGN SOLELY AS A HOBBY. THERE
- COULD BE ERRORS THAT CAN RESULT IN ALL KINDS OF DAMAGE. USE THESE
- DESIGNS AT YOUR OWN RISK.
-
-+ This design is released under Creative Commons Zero (CC0) license.
-
-+ Author:
- - Svjatoslav Agejenko
- - Homepage: https://svjatoslav.eu
- - Email: [[mailto://svjatoslav@svjatoslav.eu][svjatoslav@svjatoslav.eu]]
-
-+ See also:
- - [[../../index.html][Other physical projects in this repository]]
- - [[https://www.svjatoslav.eu/projects/][Other projects hosted at svjatoslav.eu]]
-
-* Project description
-[[file:make.png]]
-
-[[file:make,%202.png]]
-
-Simple rechargeable Ni-MH battery tester. The problem with those
-batteries is: right after you take them out of charger, voltage level
-at their terminals is good. But some old batteries will get
-empty/discharged way too quickly under normal load. This device is
-intended to discover old batteries with reduced capacity.
-
-Freshly charged batteries are tested under high load for short time by
-shorting battery + and - terminals using 5 ohm power resistor
-(R1). Simultaneously battery voltage is being measured while under
-load.
-
-[[file:electrical%20schematic.png]]
-
-I use vintage analog voltmeter. Instead of power resistor I use
-Nichrome resistance wire. Test/measurement button should not be
-pressed for long because power resistor gets hot quickly and battery
-is being quickly depleted during measurement.
-
-[[file:assembly.png]]
-
-+ Body: [[file:body.png]]
-+ Cover: [[file:cover.png]]
-
-+ Download:
- + [[file:bodyAndCover.FCStd][FreeCAD project]]
- + [[file:body.stl][body STL file]]
- + [[file:cover.stl][cover STL file]]
-
-+ PS: While this device is interesting to build, still you can just
- use ordinary ammeter that can handle battery generated current.
+++ /dev/null
-EESchema-LIBRARY Version 2.4
-#encoding utf-8
-#
-# Device_Battery
-#
-DEF Device_Battery BT 0 0 N N 1 F N
-F0 "BT" 100 100 50 H V L CNN
-F1 "Device_Battery" 100 0 50 H V L CNN
-F2 "" 0 60 50 V I C CNN
-F3 "" 0 60 50 V I C CNN
-DRAW
-S -80 -55 80 -65 0 1 0 F
-S -80 70 80 60 0 1 0 F
-S -52 -78 50 -98 0 1 0 F
-S -52 47 50 27 0 1 0 F
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-P 2 0 1 0 0 -40 0 -30 N
-P 2 0 1 0 0 -20 0 -10 N
-P 2 0 1 0 0 0 0 10 N
-P 2 0 1 0 0 20 0 30 N
-P 2 0 1 0 0 70 0 100 N
-P 2 0 1 10 10 105 50 105 N
-P 2 0 1 10 30 125 30 85 N
-X + 1 0 200 100 D 50 50 1 1 P
-X - 2 0 -200 100 U 50 50 1 1 P
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-ENDDEF
-#
-# Device_R
-#
-DEF Device_R R 0 0 N Y 1 F N
-F0 "R" 80 0 50 V V C CNN
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-F2 "" -70 0 50 V I C CNN
-F3 "" 0 0 50 H I C CNN
-$FPLIST
- R_*
-$ENDFPLIST
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-S -40 -100 40 100 0 1 10 N
-X ~ 1 0 150 50 D 50 50 1 1 P
-X ~ 2 0 -150 50 U 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-# Device_R_POT
-#
-DEF Device_R_POT RV 0 40 Y N 1 F N
-F0 "RV" -175 0 50 V V C CNN
-F1 "Device_R_POT" -100 0 50 V V C CNN
-F2 "" 0 0 50 H I C CNN
-F3 "" 0 0 50 H I C CNN
-$FPLIST
- Potentiometer*
-$ENDFPLIST
-DRAW
-S 40 100 -40 -100 0 1 10 N
-P 2 0 1 0 100 0 60 0 N
-P 4 0 1 0 45 0 90 20 90 -20 45 0 F
-X 1 1 0 150 50 D 50 50 1 1 P
-X 2 2 150 0 50 L 50 50 1 1 P
-X 3 3 0 -150 50 U 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-# Device_Voltmeter_DC
-#
-DEF Device_Voltmeter_DC MES 0 1 N N 1 F N
-F0 "MES" -130 40 50 H V R CNN
-F1 "Device_Voltmeter_DC" -130 -30 50 H V R CNN
-F2 "" 0 100 50 V I C CNN
-F3 "" 0 100 50 V I C CNN
-DRAW
-C 0 0 100 0 1 10 N
-T 0 0 0 100 0 0 0 V Normal 0 C C
-P 2 0 0 0 -125 -125 -75 -75 N
-P 2 0 0 0 75 75 125 125 N
-P 3 0 0 0 75 125 125 125 125 75 N
-P 2 0 1 0 10 150 30 150 N
-P 2 0 1 0 20 160 20 140 N
-X - 1 0 -200 100 U 50 50 1 1 P
-X + 2 0 200 100 D 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-# Switch_SW_SPST
-#
-DEF Switch_SW_SPST SW 0 0 Y N 1 F N
-F0 "SW" 0 125 50 H V C CNN
-F1 "Switch_SW_SPST" 0 -100 50 H V C CNN
-F2 "" 0 0 50 H I C CNN
-F3 "" 0 0 50 H I C CNN
-DRAW
-C -80 0 20 0 0 0 N
-C 80 0 20 0 0 0 N
-P 2 0 0 0 -60 10 60 70 N
-X A 1 -200 0 100 R 50 50 1 1 P
-X B 2 200 0 100 L 50 50 1 1 P
-ENDDRAW
-ENDDEF
-#
-#End Library
+++ /dev/null
-EESchema Schematic File Version 4
-EELAYER 30 0
-EELAYER END
-$Descr A4 11693 8268
-encoding utf-8
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-Title ""
-Date ""
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-Comp ""
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-Comment4 ""
-$EndDescr
-$Comp
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-U 1 1 5EC97EC8
-P 2600 3750
-F 0 "BT1" H 2708 3796 50 0000 L CNN
-F 1 "Battery" H 2708 3705 50 0000 L CNN
-F 2 "" V 2600 3810 50 0001 C CNN
-F 3 "~" V 2600 3810 50 0001 C CNN
- 1 2600 3750
- 1 0 0 -1
-$EndComp
-$Comp
-L Switch:SW_SPST SW1
-U 1 1 5EC98542
-P 3100 3250
-F 0 "SW1" H 3100 3485 50 0000 C CNN
-F 1 "SW_SPST" H 3100 3394 50 0000 C CNN
-F 2 "" H 3100 3250 50 0001 C CNN
-F 3 "~" H 3100 3250 50 0001 C CNN
- 1 3100 3250
- 1 0 0 -1
-$EndComp
-$Comp
-L Device:R R1
-U 1 1 5EC98B01
-P 3550 3700
-F 0 "R1" H 3620 3746 50 0000 L CNN
-F 1 "5" H 3620 3655 50 0000 L CNN
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- 1 3550 3700
- 1 0 0 -1
-$EndComp
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-F 0 "R2" V 3643 3250 50 0000 C CNN
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-F 3 "~" H 3850 3250 50 0001 C CNN
- 1 3850 3250
- 0 1 1 0
-$EndComp
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projects / physical.git / commitdiff
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