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need help on a digital100amp volt meter

Discussion in 'General Electronics Discussion' started by rambo99, Dec 4, 2013.

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  1. rambo99


    Apr 24, 2011
    My son buy a DC 4.5-30V 0-100A Dual LED Digital Volt Ammeter Voltage AMP Power from ebay and he connect to a 12v power supply this power supply is 85amp which power a car amplifier which work very good he is trying to connect this digital meter so he can check to see how much amp is dropping down from the power supply but it seem the meter don't work that way I connect the meter to a battery and a 12v motor and the meter work ok it shows the volts and the amp is any way to set this meter so the volts and amp shows or this meter can only work with load
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
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