Click on either to enlarge.
Circuit version number 1 uses zener diodes. The original was designed by electroschematics.com and published at http://www.electroschematics.com/5816/led-volt-meter/
Circuit version number 2 uses IC LM 3419, was designed by Electronic Circuits.com and can be found here: http://www.electronicecircuits.com/electronic-circuits/lm3914-12v-battery-monitor-circuit
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I'm sorry to have to say that the number of spam comment postings has required that we turn off anonymous comment posting. There's been a massive boom in what seems like computer-automated spam comments with links to web pages that advertise cheap, nasty, bad-for-you products, mostly cigarettes.
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