Need Help on ATX PSU

Discussion in 'General Electronics Chat' started by famesethu, May 22, 2010.

  1. famesethu

    Thread Starter New Member

    Oct 25, 2009
    Hey guys,

    I've two ATX powersupplies 300 watts and 450 watts.I'm on a plan to impliment a PC on my Car.So can any one tell me a way to power these SMPS from 12 car battery.I meant by providing 12v after the stepdown transformer or something.I dont want to use a DC to AC converter and then apply it to the PSU.
    please help.....:confused:
  2. bertus


    Apr 5, 2008

    The way you would like to use it will not work.
    You need much more voltages than the 12 Volts.
    The powersupply will NOT convert them by applying only the 12 Volts.

    Here is a pinout with the used voltages of the ATX powersupply:

  3. retched

    AAC Fanatic!

    Dec 5, 2009
    You will need to get yourself a DC power supply for your vehicle.

    This completely replaces the PC supply.

    If you were hoping to use a standard 400w or 600w inverter, no dice. Well unless you pump out some serious money on a 'TRUE SINE WAVE' inverter. not "modified" or other such 'marketing worded' stuff.

    here is a 300w car DC supply.. under $100us:;jses...3eSbNmTb3mTe34Pa38Ta38Tbhz0?sc=8&category=101

    Also look into the pre-made CarPuter set ups. they have some nice stuff, for cheap, that is built to stand the rigors of automobile life. Bumps and bangs, crazy voltage changes and spikes, and temperature. Gets to +130deg F in a car on a hot day.
    $251 with Powersupply.
  4. BMorse

    Senior Member

    Sep 26, 2009
    For a carputer, those new ATOM boards will be very sufficient, and they have power supplies (DC to DC) available to directly power off of a car battery....

    I have a Shuttle SD30G2 in my truck and I ended up having to use a 700Watt inverter to power it..... I am looking into replacing it with an ATOM board and their new DC to DC power supply.

    B. Morse