<html lang="en">
<head>
<title>Physical projects</title>
-<!-- 2020-05-24 P 12:44 -->
+<!-- 2020-05-24 P 23:49 -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="generator" content="Org-mode">
power/12V%20Lead-Acid%20battery%20changer%20and%20terminal/make.png
"></a>
</li>
+
+<li>battery tester
+<br/><a href="power/battery%20tester/index.html"><img style="width:100%; max-width:500px;" src="
+ power/battery%20tester/make.png
+ "></a>
+</li>
</ul>
</div>
</div>
</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="date">Created: 2020-05-24 P 23:49</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>
power/12V%20Lead-Acid%20battery%20changer%20and%20terminal/make.png
)}}}
++ battery tester
+ {{{imglnk(
+ power/battery%20tester/index.html,
+ power/battery%20tester/make.png
+ )}}}
+
** USB
+ USB cable terminals
<html lang="en">
<head>
<title>AA and AAA battery tester</title>
-<!-- 2020-05-24 P 20:26 -->
+<!-- 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">
</p>
<p>
-Freshly charged batteries are tested under high load by shorting
-battery + and - terminals using 5 ohm power resistor
+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>
<p>
I use vintage analog voltmeter. Instead of power resistor I use
-Nichrome resistance wire. It gets hot quickly!
+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>
</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></div>
<footer id="postamble" class="">
<div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2020-05-24 P 20:26</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>
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
+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. It gets hot quickly!
+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]]
+ [[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.
projects / physical.git / commitdiff
