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Thread: Powering 2 monitors

  1. #1
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    Powering 2 monitors

    I'd was wondering if I'd like to add 2 monitors for me rear seats connected via svideo to my computer. I would just add a DC-DC Regulator and set them both to 12v or different depending on the voltage of the monitor? So it would be battery, another fuse, dc-dc reg, 2 monitors? And whatever guage the power requirement would be?
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  2. #2
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    I was looking at this.

    http://store.mp3car.com/ProductDetai...Code=PWR%2D010

    I think the monitors use 9-12 volts for power source. Now the carnetix p1900 as 1 outputs one with +18/+19/+20V and another with +12V/+13.5V or +5V.

    Can I connect a monitor to the +18v on the carnetix or will it send a power surge to my monitor and blow it? And I'm assuming the 12v will work fine for the second monitor.
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  3. #3
    Constant Bitrate Eternalodyssey's Avatar
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    ViViper, I would simply attach Molex connectors daisy-chained onto the 12V rail of the carnetix. The 12V rail should be more then sufficient to handle two monitors as most monitors only consume .5-1.0 Amps. That is not too serious of a draw and you will have the monitors switched off automatically when the supply is off. Although, many monitors nowadays come equipped with sufficient voltage regulation/protection and shut off when there is no video source detected. Hope this input helps.
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    Quote Originally Posted by Eternalodyssey View Post
    ViViper, I would simply attach Molex connectors daisy-chained onto the 12V rail of the carnetix. The 12V rail should be more then sufficient to handle two monitors as most monitors only consume .5-1.0 Amps. That is not too serious of a draw and you will have the monitors switched off automatically when the supply is off. Although, many monitors nowadays come equipped with sufficient voltage regulation/protection and shut off when there is no video source detected. Hope this input helps.
    Sorry haven't had the internet for the last few days and it's been driving my crazy because I'm having trouble setting up the pc . How do I attach Molex connectors daisy-chained onto the 12V rail of the carnetix? I don't quite understand this part.
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  5. #5
    Neither darque nor pervert DarquePervert's Avatar
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    Quote Originally Posted by ViViper1 View Post
    Sorry haven't had the internet for the last few days and it's been driving my crazy because I'm having trouble setting up the pc . How do I attach Molex connectors daisy-chained onto the 12V rail of the carnetix? I don't quite understand this part.
    The molex is a generic term that refers to the 4-pin HDD power connector. (Technically Molex is a brand of those style connectors)
    There are 4 wires in teh molex: Red, Black, Black, Yellow.
    Yellow = 12v
    Black = Ground
    Black = Ground
    Red = 5v


    You would simply need a male HDD power connector (the ones from the power supply are female) and wire the power lines from your screens into the 12v and ground pins.
    Have you looked in the FAQ yet?
    How about the Wiki?



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  6. #6
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    Quote Originally Posted by DarquePervert View Post
    The molex is a generic term that refers to the 4-pin HDD power connector. (Technically Molex is a brand of those style connectors)
    There are 4 wires in teh molex: Red, Black, Black, Yellow.
    Yellow = 12v
    Black = Ground
    Black = Ground
    Red = 5v


    You would simply need a male HDD power connector (the ones from the power supply are female) and wire the power lines from your screens into the 12v and ground pins.
    So I would have to buy this

    http://www.crazypc.com/products/PQ4-53901.html

    and then cut the power cable for the monitor, btw which one is positive and negative on the lilliput monitors? Solid Black or solid black with a white stripe.

    Somehow run it into these male connectors. But it would be 2 positives into the 12v, and 2 monitor grounds into 1 ground or both?

    Then on the carnetix box I would connect the 2 wires for the 20v output to a female molex? 1 wire going into the ground? And voila plug and watch it work?

    I don't know much about electronics, but I was wondering why can't I just wrap the 2 positive wires and 2 ground wires straight to the wires that come out of the carnetix? Sorry by wrap I mean wrap the ends, not sure the term.
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  7. #7
    Neither darque nor pervert DarquePervert's Avatar
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    I'd purchase something like this: http://store.mycableshop.com/itemdes...PUFANADAPT.htm rather than just the pins.

    Even better: http://www.action-electronics.com/molex.htm#Amp

    Yes you could splice into the wires, but I think it's a better idea to wire up a compatible connector. That leaves your wiring harness for the PSU intact, so you can more easily sell it later on down the road, disconnect devices for troubleshooting, etc.
    Have you looked in the FAQ yet?
    How about the Wiki?



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  8. #8
    Constant Bitrate Eternalodyssey's Avatar
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    Your best bet is to simply use an in-line crimp connector and then cut apart the molex connector to crimp the wires together. The crimp connector looks like a tube and has metal inside it. Simply cut the yellow wire and the ground wires and then strip a small bit to expose some of the conductor. Then crimp the wires to connect them to your power source and your ground. This way you have a removable power connection. I am working on mine today and I can shoot over some pictures here in a little while. Also, your power wire on your monitor is going to be the solid wire WITHOUT the stripe. The ground wire is the wire WITH a stripe going down the side.
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