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Thread: Power through AC/DC input plug, or battery plug?

  1. #1
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    Power through AC/DC input plug, or battery plug?

    Hey guys, ive chopped up my older laptop and putting in my glovebox in what is going to be a pretty trick install.
    I was just wondering, should I power through the 20v DC input in the backof the board, or connect into the 14.8Vinput that my battery uses to power the system located at the front of the board. Ideally id like to use the battery input connection because 14.8v is very close to the volatge of the car when running, so I could just hook up directly to the car battery, and use a startup controller to bing the system outof standby when the ignition is on accessories/on/start (do you think the system would crash with this setup when cranking the engine)

    What would you use? The battery input has 7 pins but I can only see 2 of these conenction to the circuitry on the PCB. So I dont think it should be too much of a problem.

  2. #2
    Unregistered User ODYSSEY's Avatar
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    You would want to get a PSU to provide a stable 20V. Do not connect your laptop directly to your car's battery, unless you want a paper weight.
    ODYSSEY

    Quote Originally Posted by Tidder View Post
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    All information expressed in this post is my opinion, and should not be regarded as a statement of fact.
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  3. #3
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    No I would use a 15v from a stabilised cigarette lighter auto/plane adaptor style like this...

    http://cgi.ebay.com/Universal-Notebo...QQcmdZViewItem

    set to 15v and wire to my old battery plug which would then plug onto the mainboard. I dont see that frying the mainboard I dunno. I just wonder whether it would survive cranking the engine. Also would running the AC/DC input of 20v provide a better computer experience than the 14.8v of the battery.

  4. #4
    Unregistered User ODYSSEY's Avatar
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    Quote Originally Posted by simvegas
    No I would use a 15v from a stabilised cigarette lighter auto/plane adaptor style like this...

    http://cgi.ebay.com/Universal-Notebo...QQcmdZViewItem

    set to 15v and wire to my old battery plug which would then plug onto the mainboard. I dont see that frying the mainboard I dunno. I just wonder whether it would survive cranking the engine. Also would running the AC/DC input of 20v provide a better computer experience than the 14.8v of the battery.
    That would drop out during crank. You would be better off setting it to 20V and having a battery installed. Kinda a built-in tank circuit.
    ODYSSEY

    Quote Originally Posted by Tidder View Post
    Hey, as long as it's not any particular race I'm offending, I can stand to be a pedophile.
    All information expressed in this post is my opinion, and should not be regarded as a statement of fact.
    Digital-Car UK|

    (\__/)
    (='.'=)
    (")_(")

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