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Thread: Power Supplies = Confusion

  1. #1
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    Power Supplies = Confusion

    Hey guys just a quick question. I've been ing and ing for a few weeks now and I'm still confused about power supplies. I want to build a carpc using an VIA-EPIA M10000 board 512ram 80gig 3.5' drive and a 2.5' DVD rom. What power supply does a system like this require? Does it need to be hard wired or can I use a cigarette type adapter. Thanks in advance and thanks for your patience, I know many of you donít like to answer basic questions like this but honestly I'm new & confused

  2. #2
    FLAC alti's Avatar
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    You need a regulated 12v DC power supply. Ideally it should be wired directly to you cars battery. The amount of wattage you feel you need for your system is up to you, but looking at what you have listed there I would think that you would do fine with anything 90 watts or more.

    check out the store portion of this site, should give you a good start.

    Wether or not you want to do DC-AC-DC or DC-DC is also up to you.
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  3. #3
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    Thanks for such a quick response. I guess my next question is what's the difference between

    The Opus Here That says, "power supply works with ATX motherboards "
    And
    The PW-70a that says that it's designed specifically for the Mini-ITX.

    Thanks again, I appreciate your input

  4. #4
    FLAC alti's Avatar
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    The PW-70a is just a small power supply that is made for the purpose of being small. It is AC-DC and as far as I know it is not regulated

    The opus is Dc-DC and regulated so you can connect it directly to your cars battery
    My Install

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    StopWatch
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  5. #5
    Variable Bitrate RS3RS's Avatar
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    Quote Originally Posted by 2THXTRM
    Hey guys just a quick question. I've been ing and ing for a few weeks now and I'm still confused about power supplies. I want to build a carpc using an VIA-EPIA M10000 board 512ram 80gig 3.5' drive and a 2.5' DVD rom. What power supply does a system like this require? Does it need to be hard wired or can I use a cigarette type adapter. Thanks in advance and thanks for your patience, I know many of you donít like to answer basic questions like this but honestly I'm new & confused
    I would recomend the OPUS, it's definitely an awesome power supply for carputers. Automatically turns the computer on/off, survives crank, etc.

    As far as just what it requires goes, you can use pretty much anything. While a DC-to-DC power supply like the OPUS is best, you can also use a normal, "house hold" ATX power supply with a power inverter. This is a little more crude, and will require you to turn it on/off manually (unless you get a relay of some sort set up to do that for you). A normal power supply with an inverter also uses more power than a DC-to-DC power supply, and might not survive crank (ie, when you start the engine, the computer runs low on power and shuts down).

    You CAN run your computer through a cigarette lighter, but I wouldn't recommend it. Cigarette lighters aren't really wired to handle computers, and it would probably be best to run it all hard wired (it's not that hard to do, and probably worth it just to run a line into the car from the battery).

    Hope that helps some

  6. #6
    Variable Bitrate
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    Quote Originally Posted by alti
    The PW-70a is just a small power supply that is made for the purpose of being small. It is AC-DC and as far as I know it is not regulated

    The opus is Dc-DC and regulated so you can connect it directly to your cars battery
    the pc-70a is NOT ac-dc its dc-dc i use it you will need an ITPS to regulate the voltage to 12 volt, and don't forget to put a fuse before it.

    i just got an m1-atx gonna install that as soon as i get my new screen, will make a review of it.. install guide etc

    i looked at the opus too, very nice but the price was to high for me.
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  7. #7
    Low Bitrate hondaguru's Avatar
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    What about the carnetix stuff???

  8. #8
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    The Opus does look nice but it sure drives up the price of the project does carnetix make something more affordable?

  9. #9
    See me in my wet t-shirt. stevieg's Avatar
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    Have a look at the new Carnetix (1280 I think) and a cheap DC-DC PSU such as the Morex ones.

    The Opus is worth the money though, you won't look back
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