Discharge up to eight 1.5V alkaline cells independently with constant current and measure the time = capacity.
Based on Arduion Nano.
Youtube Video in English: https://youtu.be/sXIeAKB41Y0
Youtube Video in German: https://youtu.be/Gl1ISn4Dsfc
Software on Github: https://github.com/RainerU/DestructiveBatteryTester
Simple 2 transistor linear current source using PNP transistors and current sink using NPN transistors.
The forward base emitter voltage drop (Vbe) of a bipolar transistor (bjt) is proportional to the log of the base current and rapidly rises to between approximately 0.55V and 0.7V for base currents over a few hundred nA. So for most purposes the Vbe of a bjt when conducting a collector current c...
![LED driver 1A 2.png](//image.easyeda.com/pullimage/pyW3A5ZZfFKeFs0urNFYrR6nrWxFsTLqp6fUsyyn.png)
**Until furter notice: This is a work in progress**
***This circuit DOES NOT WORK with the currently suplied BOM! ***
*30.04-2019 All parts have finaly arrived and i've finished two LED driver sircuits. Solderjob have been veryfied with magnifying lens and multimeter.
Results are pretty much the...