In this project, I have a +12 volt battery powering a modem, and an Arduino (which estimates the battery state, among other things). To power the Arduino, I used a switch-mode DC-DC converter (it outputs around 4.94V, rated for 1.5A). I used a multimeter to measure an AA battery and it reads 1.38 v…

Measuring Voltage of Battery

billhowl April 6, 2014, 3:25am 3

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