Quote:
Originally Posted by MetroMPG
I wish my definition of "simple" matched yours! This is something I would have to invest a big pile of time & learning to accomplish (not that there's anything wrong with that).
Though I will say: thanks, because your post motivated me to decide I will study electronics a bit more this winter.
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The hardware is simple, the software is comparatively complex for me. In fact, if you don't mind physically moving the batteries to a charger, all you need as far as hardware goes is 3 NPN transistors and 4 resistors. If you can figure out how to write a program to read and write the control lines of a serial port (somewhat complex), it would be very easy to write a program to automate the measurements.
The very easiest to build is to take an analog clock and add a load resistor.