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Thread: Does this exist?

  1. #1
    Newbie mrspangle's Avatar
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    Does this exist?

    Hi,

    Does anyone know somewhere I can get a PCB with two PSU in and one out (to motherboard)? With preferably a switch on it.

    I want to be able to power by carputer from the battery of my car, and another time by the mains power.

    Regards

  2. #2
    Neither darque nor pervert DarquePervert's Avatar
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    Quote Originally Posted by mrspangle
    Does anyone know somewhere I can get a PCB with two PSU in and one out (to motherboard)? With preferably a switch on it.

    I want to be able to power by carputer from the battery of my car, and another time by the mains power.
    Your questions are difficult to decipher.
    I think you want a PSU that will connect to both the car's electrical system as well as to household wiring, with the ability to switch electrical sources.
    The answer is no.

    Your best bet is to get a DC-DC power supply and a converter that will allow you to power the 12vDC from household current.
    Have you looked in the FAQ yet?
    How about the Wiki?



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  3. #3
    Newbie mrspangle's Avatar
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    Hi,

    I have an Opus already and a Morex 60w which draws from the house.

    What I want is to plug both of these devices into a PCB which will allow switchable input to power the motherboard?

    Any clearer?

    Regards

  4. #4
    Neither darque nor pervert DarquePervert's Avatar
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    Quote Originally Posted by mrspangle
    I have an Opus already and a Morex 60w which draws from the house.

    What I want is to plug both of these devices into a PCB which will allow switchable input to power the motherboard?

    Any clearer?
    It still doesn't exist.
    Have you looked in the FAQ yet?
    How about the Wiki?



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  5. #5
    Constant Bitrate
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    I think your idea is to switch between the 2 ATX PSUs (Opus or Morex). You could make one using either (1) relays or (2) power MOSFETs. Option 1 is easier - just get the right number of relays (one for each voltage: 3.3V, 5V, 12V, -5V, -12V depending on your needs).

  6. #6
    Newbie mrspangle's Avatar
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    Hi,

    Thanks for the replies, I dont think I could make one - ive never done anything like this before. I was just wondering if there was anything on the market the moment. I guess not!

    Thanks

  7. #7
    MySQL Error MatrixPC's Avatar
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    There is no such animal exist. Whatever solution (currently available), you have to plug and unplug. I use ATX extension and Y drive adapter so I just unplug the DC PSU and plug the AC PSU when needed.
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  8. #8
    Maximum Bitrate mushin's Avatar
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    You could replace the ATX power connector with a DB25 one, and use a manual parrallel port switch. Or you could tear apart the box and connect to the leads directly, which might be easier. My only concern would the wire gauge inside the switch, but at < 60W total it's probably OK (I'd make sure though).

    An easier solution though, would be to run the DC-DC through the AC-DC PSU. A decent sized ATX PSU should provide [60W * PSU efficiency] on the 12V rail easily, run the mains though that, and then switch between that output and the car battery. Now you only have 2 leads to switch (vcc and ground), which any number of heavy duty automotive switches can handle no problem. Just makes sure its rated for whatever you're going to be drawing, which may be as high as 80W.

    What I want to know is, why do you want to connect two PSU's simultaniously? Are you going to plug the car into mains while it's parked?

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