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Thread: Powering lilliput from psu and relay from car

  1. #1
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    Powering lilliput from psu and relay from car

    Just about to install my car PC and basicly this is what i want to do.

    I want to power my screen from my m2atx - which is fine i made a molex plug and plugged it in no problems. But, i want the ignition to control on and off. So power from m2atx but switch off and on depending on ignition status.
    Theres been some threads about this when searching but i couldnt find astraight answer.

    When i got the screen i got a relay and something else with it for car use the relay that says 5A and 12vdc. its got 8 pins on it. i know the bottom 2 are for the relay ground and pos (i think its +5v it needs or am i wrong)?

    I connected 2 of the other pins to a molex for power and that seems to be giving 12v no problems, Then 2 of the other pins go out with 12v when its active, BUT, what i dont understand is, The wires are curently going out to this:


    Then come out of it into a barrel plug. So basicly, What is the use of this black box and do i need it? and am i doing things right? sorry if its abit basic.

    Thanks

  2. #2
    Banned Motorcity's Avatar
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    Damn, do you know what you are doing?
    that box you show a picture of is a voltage regulator!
    the 2 wires going into it are for + and - from your car, the other 2 (with barrel connecotr) plug into the monitor.
    If you are using the MII to power your monitor directly, then you don't need to use the box in your picture, since the power will be regulated to 12 volts off the PSU.

    Now, as far as ignition controlling on/off, please take a momoent and read the instructions that came with your M2. If you don't have them, look for them.
    This little piece of paper will tell you exactly how to power the PSU on/off withg ignition on/off.

    Please post a pic of this realy you speak of.

    Side note:
    WTF? is there something in the air this week?
    Darque? I need the flamethrower please.

  3. #3
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    If u read my post. I did not ask about powering my m2atx on... i asked about using the car ignition to control turning the screen off and on and powering it from the m2atx.. NOT powering it from the car and NOT using the m2atx to switch it on.....i know how to turn my m2atx on with the ignition that is NOT what i asked. So there must be something in the air.

    THankyou for answering my question which was:

    Yes i was doing the right thing (kind of) and
    No i dont need the black box.....

    that is what i asked. Not how to power my m2atx on.....

    thanks..
    PS. The idea is that by powering it straight from the m2atx would mean if my pc is shutting off say 30 minutes late or whatever... then the screen would remain on... By doing this i plan on the screen shutting off and the pc staying on... But still being powerd from the m2atx... Once again i did not ask how to pwoer my m2atx on. I know how to read instructions which is why i didnt ask you how to power my m2atx using the car ignition.

    You have either misunderstood what i have asked or are just plain rude. here is the pic if you misunderstood.... thanks... once again i know how to power my m2atx using the ignition...

    On second thoughts dont bother with the pic im sure ill work it out. thanks for your help.

    If i knew what i was doing would i of posted asking?

  4. #4
    Banned Motorcity's Avatar
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    Quote Originally Posted by bigbun
    If u read my post. I did not ask about powering my m2atx on... i asked about using the car ignition to control turning the screen off and on and powering it from the m2atx.. NOT powering it from the car and NOT using the m2atx to switch it on.....i know how to turn my m2atx on with the ignition that is NOT what i asked.
    You want to run the monitor off the M2, and have it turn on/off with ignition right?
    Unless I am missing something here, the M2 (wired properly) will shut off/turn on with ingition off/on.

    What else do you want?

  5. #5
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    correct me if im wrong, But if i set my m2atx to power off after a 15 minute delay (for example) Then power will be to the computer, and tehrefore the molex plugs...for 15 minutes...therefore leaving the screen on for 15 minutes....until it powers off. Thats why i need to use a relay, correct?

  6. #6
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    Quote Originally Posted by bigbun
    If u read my post. I did not ask about powering my m2atx on... i asked about using the car ignition to control turning the screen off and on and powering it from the m2atx.. NOT powering it from the car and NOT using the m2atx to switch it on.....i know how to turn my m2atx on with the ignition that is NOT what i asked. So there must be something in the air.

    THankyou for answering my question which was:

    Yes i was doing the right thing (kind of) and
    No i dont need the black box.....

    that is what i asked. Not how to power my m2atx on.....

    thanks..
    PS. The idea is that by powering it straight from the m2atx would mean if my pc is shutting off say 30 minutes late or whatever... then the screen would remain on... By doing this i plan on the screen shutting off and the pc staying on... But still being powerd from the m2atx... Once again i did not ask how to pwoer my m2atx on. I know how to read instructions which is why i didnt ask you how to power my m2atx using the car ignition.

    You have either misunderstood what i have asked or are just plain rude. here is the pic if you misunderstood.... thanks... once again i know how to power my m2atx using the ignition...

    On second thoughts dont bother with the pic im sure ill work it out. thanks for your help.

    If i knew what i was doing would i of posted asking?

    Ok, I get the point that you know how to power your M2. 12 times over.
    What I didn't (and still don't) understand is why you want power both off the M2, and have the monitor shut off, but leave the pc on for whatever time you set the shut down for.
    Now, I can understand if your install is custom, and you are not using the monitor's osd board. But, even if you are doing this, why not just run an on/off switch and manually turn the monitor off when not needed?

    what I am getting at is why not just use the regulator to power the monitor and turn it on/off whenever you need it? I can understand there are times when you don't need the display to use the pc, but in all honesty it seems like you just want to take a difficult path to an easy solution.

    and no, I am not just plain rude. I was simply trying to assess the situation, and help you out.
    But, since you seem to want to leave in a huff, be my guest.

  7. #7
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    Quote Originally Posted by bigbun
    correct me if im wrong, But if i set my m2atx to power off after a 15 minute delay (for example) Then power will be to the computer, and tehrefore the molex plugs...for 15 minutes...therefore leaving the screen on for 15 minutes....until it powers off. Thats why i need to use a relay, correct?
    no, just use a fuse to protect the monitor.
    why the relay?

    and quit editing your posts after they have been replied too.

  8. #8
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    I havnt left dont you worry
    I want it powerd off my m2atx, if i use a molex adaptor to do that. It will remain powerd on until the m2atx is shut down (which i want to be delayed).

    as you say my install is custom, i want the computer to stay powerd for a while after the ignition is switched off... But the monitor to turn off. If i connect it with a molex plug to my m2atx im saying it will not turn the screen off until the m2atx powers down (which will be delayed?).

    Therefore relay needed, or still no?

    and yes it is the long way around simply pressing the red button on my lilliput remote but this is how id like it.

    and yes i know how to power my m2atx btw...

  9. #9
    Variable Bitrate redbullah's Avatar
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    Quote Originally Posted by bigbun
    correct me if im wrong, But if i set my m2atx to power off after a 15 minute delay (for example) Then power will be to the computer, and tehrefore the molex plugs...for 15 minutes...therefore leaving the screen on for 15 minutes....until it powers off. Thats why i need to use a relay, correct?
    Most screens are signal sensitive. So just power it up with any +12v.

  10. #10
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    anyway my main 2 questions have been answerd.
    I think i will just power it using the regulator and relay off my cars wiring it will be simpler .

    thanks for your replies.

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