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Thread: Laptop Power Hardwire

  1. #1
    Join Date
    Nov 2006

    Laptop Power Hardwire

    Hi all, I want to put together a car pc using my old hp omnibook laptop. Right now I am trying to figure out how to connect it to be powered. I am looking to hardwire it in. Here is what I donít want to do.

    Total cost $35. Unfortunately, Iíll have all that unsightly cabling running everywhere. What I want to do is hardwire it into the carís system, being able to power both the laptop and a 7Ē lilliput touch screen.

    From all the searching Iíve seen, I have to buy either the above solution, or buy a CarNetix DC/DC powersupply ($$) that somehow I wire into the laptop and the touchscreen.

    Is there no simpler way of hardwireing the laptop into the carís power system? I am not looking to spend 90 dollars to connect.

    I was also considering going the $35 dollar route, splicing open the wires, extending, and running to the trunk if nessesary.

    Laptop Ė 19v @ 3.16A

    Comments? Suggestions?

  2. #2
    Neither darque nor pervert DarquePervert's Avatar
    Join Date
    Apr 2004
    You can hardwire the laptop's car adapter. Just cut off the cigarette lighter plug, strip some wires and have at it.

    Wire up the Lilliput the same way.

    The only concern I have about what you propose in your diagram is that the cigarette lighter might not be able to support the power draw of both the laptop and the lilliput. I can't say for certain.
    Have you looked in the FAQ yet?
    How about the Wiki?

    Under normal circumstances, a signature would go here.

  3. #3
    Join Date
    Oct 2006
    Should be fine all running from the cig lighter. Your laptop will draw a little over 5 amps and your lilliput will likely draw under 1. I have yet to see a cig lighter that doesn't have at least a 10 amp fuse.

  4. #4
    Constant Bitrate csnowman00's Avatar
    Join Date
    Feb 2005
    Wilkes-Barre, PA
    So even though the laptop calls for 19v, it will still run? Would voltage spikes and fluxes from the starter, sound system affect the laptop?
    Current Progress:
    Final Assembly

    Ramline P3 PC
    10.4 inch Touchscreen
    Windows XP Embedded
    Road Runner
    Electrical Engineer / Mobile DJ

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