Dual power source

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  1. - 9th January 2014, 18:01 #1
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    Demon
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    Default Dual power source

    I've been reading a lot of threads and googling about this. I'd like to use HEXFETs as switches between sources. this is for a residential alarm system; 12V for siren, 5V for logic.

    Name: Dual Source Power.JPG Views: 1151 Size: 40.5 KB

    The built-in diode drops very little voltage and is intended to prevent reverse current. I kept things simple to illustrate, I'll add fuses, caps, etc later.

    Comments? Suggestions?

    Robert


    Edit: U? R? Q? BT? Are unnumbered labels from QCAD that I forgot to erase from image.
    Last edited by Demon; - 9th January 2014 at 21:39.
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