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Thread: Got my DC/DC converter

  1. #1
    FLAC edrex's Avatar
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    Question Got my DC/DC converter

    Here is the original thread

    Seems well built. Didn't come with any manual.
    Here is my question: the wire from my headrest monitors seems to only be one wire, not a + and -. But on the converter there are 2 wire outputs, + and -. Should I wire to the + terminal only, or am I missing something.
    Attached is a picture of the terminals on the power supply.
    Thanks.
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  2. #2
    MySQL Error Scouse Monkey's Avatar
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    Could be another case of grounding through the input connector - liek you can get with VGA screens. Possibly grounds through the outer contact of the RCA

  3. #3
    FLAC
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    I'm sorry if I missed something very basic here, but.... why would you spend $89.95 for a +12V/50W regulator...or even $59.95 for a +12V/25W regulator, when you can buy a 60 watt regulator (with several additional features) here in the MP3Car store for $69.95(http://www.mp3car.com/store/product_...products_id=60 ). Sorry if this sounds a little harsh, but I'm not understanding the logic....??
    MikeH

  4. #4
    MySQL Error Scouse Monkey's Avatar
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    hehe, click his original thread and you will see he got it for $40.

  5. #5
    FLAC
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    ...ah.. missed the second post.
    MikeH

  6. #6
    Low Bitrate
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    wrong

    Hey Mike you are right, sorry guys. The regulator is 39.95 or 39.99, but check out their shipping charges $20.00, initially I thought the same, not a bad deal 30.00 bucks less than the carnetix, but after setting up a quick account and trying to buy one I almost **** with the 20.00 shipping to CT. I will pay the extra 10 and get a couple added features.

    Hey Mike how about a small disc coupon for the support.

  7. #7
    FLAC edrex's Avatar
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    Quote Originally Posted by petesonline
    Hey Mike you are right, sorry guys. The regulator is 39.95 or 39.99, but check out their shipping charges $20.00, initially I thought the same
    Yeah, I thought that was bad too so I emailed for better rates. Ended up with $12 shipping from Canada to California and it took about 3 days to get it. To compare, shipping the Carnetix would cost $9.61 for me.
    Anyway, I'm not all that informed about this kind of thing. I read that this power supply would be great for powering up to 4 monitors, and I was trying to figure a way of powering my 3 monitors.
    On the other hand, the Carnetix says this:
    The P1260 is designed to be a pre-regulator for CarPC cases that already contain an internal DC-DC ATX PSU, such as the Travla C-134 or the Morex 26xx/36xx cases, or for motherboards with on-board DC-DC PSUs (VIA TC10000).
    I honestly have no idea what all that means except that its not saying it'd be perfect for powering 3 monitors. If I missed something then thats my fault, but I figured its always good to find which products out there might work for us and test them out.



    So, back on topic: Anyone have a thought on wiring this to my monitors?
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  8. #8
    FLAC edrex's Avatar
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    Ok, dug a little further into the power line from the monitor. Attached is a pic.
    There is about 4 times as many wires on the outer layer then there is on the inner isolated wire.
    Can I safely assume that you need more wires to power then to ground and attach the thin inner wire to ground and the outer wires to positive?
    Thanks.
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    CarPC Progress[!!!!!!!!!!!!!!].....Installation[---------+].....Pastrami Progress[!!!!!!!!!!!!!!]
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  9. #9
    MySQL Error Scouse Monkey's Avatar
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    normally the outer wire is ground.

    you could check by taking the screen apart and seeing if there is a reverse polarity protection diode and work out which is which from that.

  10. #10
    MySQL Error Scouse Monkey's Avatar
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    they are normally done like this for those power conenctors with the positive on the inside (female part) and the ground on the outer part.

    EDIT: the ground is then passing down the outer shielding - it is done liek this with RCA connectors too.

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