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Thread: M4-ATX 250W Question

  1. #1
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    Question M4-ATX 250W Question

    My Name is Hibra from Oman and this is my first post at carmp3 and hope I'll gain experience from you guys.

    I've started building my car PC several weeks ago, everything is going smooth.
    i have bought M4-ATX 250W Intelligent DC-DC PSU with the intend to use it with normal ATX mainboard, but later i bought Acer L3600 with internal PSU, input voltage is 18VDC, 7amps so i bought CarNetix CNX-P2140 185W which is perfect for the setup i am running now.
    So now i am wodering if it is possible to use M4-ATX as normal power regulator to provide 12 and 5vdc that starts running once ignition is on and be off when the car is swiched off with preset off timing.

    Thanks

  2. #2
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    Yes, you can use it as a regulator for 12 volts. I don't think it has a 5 volt output, does it?
    Quote Originally Posted by ghettocruzer View Post
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  3. #3
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    what i thought this PSU (M4-atx) should be the same as the normal AC ATX PSU where it should be able to provide 12, 5 and 3.3vdc needed for standard MainBorad. The problem is i dont want to use it for that purpose, i just need 12 and 5volts for HQCT, external soundcard, and to power USB HUBs.
    If it can start supplying power just when i put on the ignition and to be off when ignition is off after a delayed time. that would be perfect.

  4. #4
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    guys .... Help!!!!
    i tried to short the green wire (power on) to the black wire (GND) according to ATX connector diagram, but still not powering the PSU.
    Please i need help from anyone who got M4atx and know how to do it.

  5. #5
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    Quote Originally Posted by hibra77 View Post
    guys .... Help!!!!
    i tried to short the green wire (power on) to the black wire (GND) according to ATX connector diagram, but still not powering the PSU.
    Please i need help from anyone who got M4atx and know how to do it.
    Ontop of pin 14 to ground, you need to give > 12v on both the acc line and the const line.
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  6. #6
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    both the acc line and const line are connected, but still the PSU not on, i tried with voltmeter to check if there is any output... no luck, once ignition is on it starts with 5 blinks then rapid blinks.

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