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    echelonone's Avatar
    echelonone Posts: 1, Reputation: 1
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    #1

    Mar 9, 2015, 10:21 AM
    Diodes
    I need to control a 12vdc relay via 9 different sources. If I put a 12v diode on each of the 9 12v lines to the relay, will the diodes prevent back feeding on the other 8 lines/sources when only 1 line/source is active/on?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Mar 9, 2015, 11:29 AM
    Yes, but you want to use diodes rated with withstand voltage greater than 12 volts to ensure currebt doesn;t fklow through them backwards. Also you want to make sure that either all 9 voltage sources have a commom ground, or else put a 2nd diode in the battery-return legs to prevent current flowing from one battery return to another.
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