From: Svjatoslav Agejenko Date: Sun, 24 May 2020 17:28:11 +0000 (+0300) Subject: documenting battery tester X-Git-Url: http://www2.svjatoslav.eu/gitweb/?p=physical.git;a=commitdiff_plain;h=5267c46b2fcbfcf061939a3266c08dcd66dc14d3 documenting battery tester --- diff --git a/power/battery tester/body.FCStd b/power/battery tester/body.FCStd deleted file mode 100644 index 75ffbf8..0000000 Binary files a/power/battery tester/body.FCStd and /dev/null differ diff --git a/power/battery tester/body.stl b/power/battery tester/body.stl index 9f5f3c5..4df1eeb 100644 Binary files a/power/battery tester/body.stl and b/power/battery tester/body.stl differ diff --git a/power/battery tester/bodyAndCover.FCStd b/power/battery tester/bodyAndCover.FCStd new file mode 100644 index 0000000..5de56ec Binary files /dev/null and b/power/battery tester/bodyAndCover.FCStd differ diff --git a/power/battery tester/cover.png b/power/battery tester/cover.png new file mode 100644 index 0000000..0a5495f Binary files /dev/null and b/power/battery tester/cover.png differ diff --git a/power/battery tester/cover.stl b/power/battery tester/cover.stl new file mode 100644 index 0000000..05f6023 Binary files /dev/null and b/power/battery tester/cover.stl differ diff --git a/power/battery tester/index.html b/power/battery tester/index.html new file mode 100644 index 0000000..7d757b8 --- /dev/null +++ b/power/battery tester/index.html @@ -0,0 +1,311 @@ + + + +AA and AAA battery tester + + + + + + + + + + + + + +
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AA and AAA battery tester

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1 General

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2 Project description

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+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. +

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+Freshly charged batteries are tested under high load by shorting +battery + and - terminals using 5 ohm power resistor +(R1). Simultaneously battery voltage is being measured while under +load. +

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electrical%20schematic.png +

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+I use vintage analog voltmeter. Instead of power resistor I use +Nichrome resistance wire. It gets hot quickly! +

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+ + + diff --git a/power/battery tester/index.org b/power/battery tester/index.org new file mode 100644 index 0000000..21dd258 --- /dev/null +++ b/power/battery tester/index.org @@ -0,0 +1,58 @@ +#+TITLE: AA and AAA battery tester +#+AUTHOR: Svjatoslav Agejenko +#+LANGUAGE: en + +* (document settings) :noexport: +** use dark style for TWBS-HTML exporter +#+HTML_HEAD: +#+HTML_HEAD: +#+HTML_HEAD: +#+HTML_HEAD: + +* 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 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. It gets hot quickly! + ++ 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]]