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Thread: Bridge batt power for relay switch?

  1. #1
    Constant Bitrate
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    Bridge batt power for relay switch?

    Okai at the moment i have my inverter hooked straight up to the battery. Fuse at the battery end of power cable.

    Just before the power reaches the inverter i have a relay which is hooked up to the acc line.

    So when i crank my car, the computer reboots, not because of low voltage but because acc line cuts out when cranking.

    So instead of using the acc line, can i splice the power cable that goes to the relay and just hook the switch at my dash to this and then to the switch on the relay.

    So basically i just replace the acc line thats switching my relay with a permament batt line.

    This should be okai yes?

  2. #2
    MySQL Error scott_fx's Avatar
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    can you just put a delay on that? maybe a simple cap and resistor? that way the relay would stay open during crank?
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  3. #3
    MySQL Error scott_fx's Avatar
    Join Date
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    New System in progress:
    M10k
    Phaze TD1500 ~> Dynaudio MD130
    Phaze TD1500 ~> Seas g18rnx/p
    Zapco Ref 500.1 ~ 12" tc-9
    Behringer DCX2496 ~ Envision Electronics psu
    Transflective Xenarc

    My Car Pc Install
    My Boat Pc worklog

  4. #4
    Constant Bitrate
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    mmm, thank you, never thought of that, will do.

  5. #5
    Constant Bitrate
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    Actually i want to be able to keep the comp on when i take the keys out, say i go to fill up petrol i dont want to leave my keys in the car.

    So for this i need the power for the switch on the relay hooked up to a permament 12V.

    So is it safe to hook the relay switch line directly to the battery with a small switch inline so i can switch the relay open/closed?

    Also does the acc line become a 14.4 volt line when the car is on because of the alternator, or does it stay at 12?

  6. #6
    Newbie
    Join Date
    Jun 2005
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    I believe that the Acc. line stays 12V because it is regulated by the voltage regulator. I think this is true. If someone could verify this that would be nice .

    BTW; I'm new here. Hi!

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