eBay Volt Amp Meter How to
IN this video we look at how you have to connect of the cheap eBay 100V 10A panel meters if you want to power it and read the values from the same source. Note: This is only usable up to 30VDC.
http://www.ebay.com/itm/DC-100V-10A-Digital-LED-Panel-Voltmeter-Ammeter-Current-Amp-Volt-Voltage-Meter/302282861029?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
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Please watch: "Diodes: The basic building block of all digital circuits"
https://www.youtube.com/watch?v=Lyii5I30gw0
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