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Thread: Power Supply Without Opus

  1. #1
    Low Bitrate
    Join Date
    Aug 2004
    Central New York

    Power Supply Without Opus

    I certailnly dont have $200 to spend on a power supply. I searched through the forum but couldnt really find any clearcut answers. I am looking for a power supply that will run of the car battery(of course) I either run the cable directly off the battery or off of of the cigarrete lighter directly. I was thinking about just using a regular old power inverter. What are the problems with using a power inverter directly out of the cig lighter and connecting to a standard computer power supply?

    I also would like the computer to shutdown after a certain amount of time. I realize I need a shutdown contoller, but wasnt sure where to turn. Again I am looking for the cheapest solution that is practicle.

    Any help would be appreciated!

  2. #2
    Constant Bitrate parawing742's Avatar
    Join Date
    Jun 2003
    You'll probably need to run power from the battery because most cig lighter sockets can't handle the necessary power (most can provide about 120w).

    The problem with power inverters is that they add another large box to your power system which is really unnecessary. Most of them can't survive engine cranking, and you'll also need to ground both the inverter AND your computer case so they won't be ground noise in your audio.

    The ITPS makes a good shut-down controller and you can find more about them by searching on this forum.
    Phillip Hullquist

    I entertain people through adventure movies.

  3. #3
    FLAC samc's Avatar
    Join Date
    Feb 2003
    Brooklyn, NY
    if you can afford the space then there's nothing wrong with a good ol dc-ac inverter then back to a ac-dc computer power supply.
    Mine needs to be updated.

  4. #4
    Low Bitrate
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    Aug 2004
    Central New York
    yeah space wont be a problem.

  5. #5
    Low Bitrate
    Join Date
    Aug 2004
    Central New York
    The ITPS seems to be a cheaper way to go as I would like the computer to stay on during crank(I hope it can). Is the ITPS only compatible with those mini ITX motherboards? I was looking just to use an older comp and was wondering if I can use it or not.

    I see

    Am I right in saying that I could buy a ITPS power supply and and this cable connector and it will power virtually any motherboard ok?


  6. #6
    Nic is offline
    FLAC Nic's Avatar
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    Oct 2003
    Melbourne, Australia
    you need an itps and a dc-dc power supply that cable wont work, and it wont survive crank
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  7. #7
    Raw Wave Confused's Avatar
    Join Date
    Aug 2003
    Essex, England
    If you decide to go the DC-DC route (which is MUCH better than an inverter) then don't even consider the ITPS, unless you know that you will NEVER, EVER, NEVER even THINK of using the computer with the car off, as it won't work.

    If you are using a Mini-ITX computer, then get yourself a DC-DC power supply such as the Morex 60W or the PW70A, and get yourself a Carnetix, as it does what the ITPS does, only better.

    If you're using a standard desktop computer (or anything that will be using more than 60W of power), then the best bet is the Opus. Yes, it might be expensive, but get it right first time, and it's a lot cheaper than getting every other method, only to find that you are getting an Opus in the end anyway. Take my advice, i've done this before. I've used inverter+ac/dc PSU, ITPS + Morex, and then I finally got the Opus, after spending as much on the other stuff as if i'd got the Opus in the first place.

    Co-Developer of A.I.M.E.E

  8. #8
    Low Bitrate
    Join Date
    Nov 2003
    North Wales
    learn from other peoples mistakes eh i used an inveter, had no problems at all

    Didnt have ashutdown controller which i wanted, but that didnt really bother me

  9. #9
    FLAC john1701's Avatar
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    Mar 2004
    Fort Myers, Fl
    same here. I too switched from inverter to opus
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