X-Git-Url: http://www2.svjatoslav.eu/gitweb/?a=blobdiff_plain;f=power%2Fbattery%20tester%2Findex.org;fp=power%2Fbattery%20tester%2Findex.org;h=0000000000000000000000000000000000000000;hb=19af345819ef415d6685de55eb218367baa47b33;hp=6e61e4fa54d1f012133f5bc65ae3feabe4081300;hpb=365f953bb4a379fb74f7ec49244484f75362c684;p=physical.git diff --git a/power/battery tester/index.org b/power/battery tester/index.org deleted file mode 100644 index 6e61e4f..0000000 --- a/power/battery tester/index.org +++ /dev/null @@ -1,65 +0,0 @@ -#+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 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.