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Thread: Power a laptop dc power supply off M2ATX?

  1. #1
    Join Date
    Aug 2006

    Power a laptop dc power supply off M2ATX?

    Right now I have my M2ATX connected to a regular M10000 setup, but I am wanting to switch to a laptop. Would it be feasible to connect a DC power adaptor from the M2ATX to the laptop? This would allow me to keep my regulated 12v for my screen, keep my shutdown controller, and not bother with an inverter. I like the features of the M2ATX, only problem is whether the 12v rail can handle it. What do you guys think? It would be more efficient too... 12V > 19or 20V instead of 12V > 120V > 120V > 20V

  2. #2
    Neither darque nor pervert DarquePervert's Avatar
    Join Date
    Apr 2004
    Where would you get the 19 or 20v from the M2ATX?

    It won't work., You're better off selling hte M2ATX and getting a Carnetix P1900 or P2140. You could also use a car power adapter for your laptop.
    Have you looked in the FAQ yet?
    How about the Wiki?

    Under normal circumstances, a signature would go here.

  3. #3
    Join Date
    Aug 2006
    the 19 or 20V would come from a DC car power supply for my laptop... the travel adaptors or something

    wow I just looked at the carnetix power supplys... I didn't know that they could do 19 or 20v... yeah that is probably what I need. Thanks... Now I just have to sell my current setup and get the laptop in my car.

  4. #4
    Join Date
    Apr 2008
    A travel adaptor for your laptop would most likely be cheaper than the carnetix P1900, also smaller in size. That is what I plan to use since the Inverter is producing too much noise.

  5. #5
    Maximum Bitrate FusionFanatic's Avatar
    Join Date
    May 2007
    as long as the M2-ATX's +12vdc rail can provide enough current for your laptop "travel adapter" then it should work fine. but even if it can't; you don't actually have to power it from the M2-ATX, you can connect the laptop travel adapter directly to the car battery and just use the M2-ATX as a startup/shutdown controller.

    alternatively, you can build one of these laptop auto-power-on modules, or buy one pre-built from 'W3bMa5t3r'. (you will have to configure the the laptop to turn off when external power is disconnected)

    a carnetix PSU would be the best option for powering/controlling your laptop. they are expensive, but there really isn't any other product that provides the odd voltages that a laptop requires and also has an integrated startup/shutdown controller.

    good luck, whatever you decide to do

  6. #6
    Variable Bitrate
    Join Date
    Sep 2007
    West Springfield, MA
    I know for a fact that, even though you laptop power adapter may be putting out 19v, your laptop does not need that much. I mean, how much voltage does your battery carry??? Mine puts out 11.something. I have also had a Gateway laptop years ago that had a 19v power brick. It turned out that it would run straight off a cigarette lighter, not a travel adapter.

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