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Thread: dumb-*** question-120v to 12v..????

  1. #1
    Constant Bitrate
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    dumb-*** question-120v to 12v..????

    i need to get my carputer set up, but dont want to keep running in and out of the house to my car to do it. my system is using the opus 90w board with the 12v hot, ground, and acc connections, but i want to work on it in my house. can i buy a standard 120v AC converter to 12v and splice the wires to the opus pcb wires? do i need to worry about mA ratings?

  2. #2
    FLAC Jahntassa's Avatar
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    You do. And you're talking amps, not mA. I don't know how much amperage the Opus needs, but it might be anywhere from 10-20 amps, if not more. You can get stuff like that (or could) at radioshack, they should be in the glass counters or something.

    Do you have any spare car batteries around, maybe? A small battery charger? You could hook it up to a spare battery with a trickle charge or something...

  3. #3
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    you need a converter. i've got a good one here providing about 20 or so amps powering my late 90's premier motorized flip down faced deck and set of component speakers plus a couple eclipse 6 1/2's. i got it for $20 at a car stereo store. anyway, just for fun i was thinking about using it to power a inverter to power a computer...ac-dc-ac-dc, how's that for efficiency??

  4. #4
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    Something like this is what I use: http://www.radioshack.com/product.as...ct%5Fid=22-508 but it's $80. I didn't like parting with the money when I bought it but it's been extremely useful so I'd say it was a good investment.

    If you don't need to run the PC more than about 90 minutes, you can get one of those portable car jumpstart power packs for half the price. You'll have power plus you get the use of the jumpstart feature.
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    Constant Bitrate HoSS's Avatar
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    A CB base station PSU is perfect.

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    Raw Wave shotgunefx's Avatar
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    Quote Originally Posted by Bugbyte
    Something like this is what I use: http://www.radioshack.com/product.as...ct%5Fid=22-508 but it's $80. I didn't like parting with the money when I bought it but it's been extremely useful so I'd say it was a good investment.

    If you don't need to run the PC more than about 90 minutes, you can get one of those portable car jumpstart power packs for half the price. You'll have power plus you get the use of the jumpstart feature.
    I'd agree on one of those jumpstart battery boosters. Damn handy. I've got one and definitely nice to have. I'm not sure, but I thought mines 12v works even when charging. The only other suggestion would be to get one of the newer ones with an air compressor.

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    Maximum Bitrate DeltaFX's Avatar
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    Get an old AT psu, they usually have a huge 12v rail.

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    Constant Bitrate CapitaineFritz's Avatar
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    Why don't you just use a standard ATX power supply? They are cheap (and some of your friends might have some spare one in their house) and you just replace the opus by the ATX psu while in the house.
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  9. #9
    Maximum Bitrate
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    AT's are cheaper and usually have a beefy switch on them, I powered a HU, and an amp with one

  10. #10
    Constant Bitrate
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    Quote Originally Posted by CapitaineFritz
    Why don't you just use a standard ATX power supply? They are cheap (and some of your friends might have some spare one in their house) and you just replace the opus by the ATX psu while in the house.
    im embarassed to say that even for a newb, i didn't think of that....thanx. good idea

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