This voltmeter ammeter was designed to it is a perfect addition to any diy laboratory power supply, battery chargers entire voltmeter consumes only. Intro: diy analog voltmeter . hey,in this instructable i would show you how to make an analog voltmeter with correct readings . working on principal of magnetic force. Low charge alarm and cell voltage display for the cordless drill battery pack i made in my last video. part one: https://www.youtube.com/watch?v=i4q2cbcj.
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