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Thread: Powering laptop

  1. #11
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
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    depends, if your laptop can run off the voltage required for it from the ps, then it could certainly be used for it's sole power no problem. if you did that you might also need to use a seperate pol power supply for either your 12v accesories or 5v acessories, but that's not so bad really.

    I like using a regular atx power supply & have that trip a relay to power a car adaptor for the laptop so then the atx power supply can be used to power all acessories you might add, the atx & the car adaptor should be more than enough to power anything you can add to your system. it may be slightly wasteful in that the 3.3v won't be very useful for much, but at least you know that you have enough power for everything else you might add.

    I guess I would look at the whole system & decide what else I would be powering... if the ps you have in mind will power everything you'll add including the laptop then that's great, but if your going to have to add another ps for accessories anyway, then I would consider using an atx supply & a car adaptor.

    if you used an atx supply tripping a relay for a car adaptor then it could still do the startup/shutdown for you... I've done them both ways & unless it's a minimalist system your building, I like the atx/ car adaptor solution better as it has more room for expansion & will allow you to grow the system without headaches, it sucks to try to add somethng to your install & realize that you don't have enough power for it. no matter what, you'll probably need 3 different voltages, 5v, 12v & whatever voltage the laptop runs at, of course the ps & a seperate pol can do the job, but if your going to add a lot of other stuff you could get to the point of needing more than one seperate pol's.. that won't happen normaly with an atx/car adaptor solution.

  2. #12
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    What if I were to wire a cigarette lighter plug in behind the dash to the ignition/accessory wire going to the headunit to power the laptop and then another one for the screen?

    That way when the car was off neither device would be drawing power and killing my battery?

    I only plan to hook up the laptop and screen in the dash area so adding things should not be a problem.

    I got the Xenarc700IDT for Christmas if anyone has some personal experience with hooking one of those up.

  3. #13
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    I have the same setup right now, and I do have problems with it: if laptop is charging and my headlights are on, monitor screen goes blank occasionally due to power shortage/spikes.

  4. #14
    Constant Bitrate soundoff's Avatar
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    use shutcontrol

    its in the software forum

  5. #15
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    You could also configure the laptop to shut down after X minutes on battery power

  6. #16
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    Quote Originally Posted by turbocad6 View Post
    I've been meaning to write-up a comprehensive power guide for laptop installs for a while now, just haven't had the time


    *wink**wink**nudge**nudge*

    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

  7. #17
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
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    yeah, I know, I'm gonna move this to the front burner & really try to get this done, hopefully this weekend I'll have the time to finish something up.

    I know this is a major hurdle with a laptop install & it really isn't that hard to handle, a decent guide will help many I think, sorry for the delays, just too many things to do & not enough hours in the day, I'll have something soon

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