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Thread: how to turn on carPC using door unlock remote

  1. #1
    Newbie
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    Jan 2008
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    how to turn on carPC using door unlock remote

    hi,
    is there anyone who can give a detailed walkthrough on how i can do that
    ?

  2. #2
    FLAC
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    Calgary, Alberta
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    Well your door remote tells your alarm brain to send a signal out a certain port and down a wire connected to that port. What you would need to do is connect that wire to the on/off pins on your motherboard so they get jumped whenever you hit the button. Furthermore, you'd have to somehow regulate the voltage in that wire to be the proper amount needed to jump the pins.

    This is simply my assumption of how it should work.

    Upon doing a little searching, why would you cross post?

    And why would you need this if you're selling your car PC?
    Ampie Case
    2.5" Hard Drive 80GB Samsung 5400RPM
    256 MB DDR2 PC5400
    Xenarc 700TSV - VGA Monitor
    Intel D945GCLF Motherboard
    M2-ATX-HV

    2005 Honda Civic

  3. #3
    Neither darque nor pervert DarquePervert's Avatar
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    pwnage.....
    Have you looked in the FAQ yet?
    How about the Wiki?



    Under normal circumstances, a signature would go here.

  4. #4
    Newbie
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    Jan 2008
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    19
    okie thanks..
    i do know that i have to jump both the pins of the CPU for it to turn on.
    but i don't understand how one wire will be able to connect both the pins, since if you want to connect wire to the pins, it will be permanently connected...

    maybe you can assist me on that??

    to answer your questions, i posted twice because i thought that maybe my question was too amateur to be posted in power and that maybe it is irrelevant and thus, no one is answering my questions... so i decided to post in the newbie zone hoping to get an answer.

    and for the 2nd question, my friend fried my previous LCD monitor when we were installing it in so i decided to scrap the carPC project altogether.
    But he kindly decided to buy me a replacement for it, and since i have already wired the carPC, i decided to go ahead with the project. Thus, making me a regular visitor to this forums for more advise from experts like you.

    thanks for your help! =)

  5. #5
    FLAC
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    May 2006
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    Calgary, Alberta
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    haha you made me laugh with your friendly sarcasm!

    I'm not exactly sure how the wire works to jump the pins, I guess it'll have to be 2 wires with a one-way gate of some sort so that power only flows one way. And when the gates open, the pins jump, the computer turns on. I don't really know, try Google.
    Ampie Case
    2.5" Hard Drive 80GB Samsung 5400RPM
    256 MB DDR2 PC5400
    Xenarc 700TSV - VGA Monitor
    Intel D945GCLF Motherboard
    M2-ATX-HV

    2005 Honda Civic

  6. #6
    Variable Bitrate rijk's Avatar
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    its very simple, get a bi-stable relais. and 3 diods.
    Cut the wire to one of your door motors. connect to wires to the cut wire and put in both wires a diode. Also connect your door engine to it.

    Put the to wires on the biostabiel. also connect a permanent minus, and to be really save put the 3d diode in this wire.

    Now you need a permanent 12+ connect that to one and of the relais, and the other to your m2 remote. Put the 2 wires of your mobo on the m2.

    And presto it works.

    For more info check my worklog, there is a some drawing of the wiring.

  7. #7
    Maximum Bitrate Injector's Avatar
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    the easiest way to do it, would be to



    but keep in mind this will pulse the power button on the mobo every time you lock or unlock your door it depends on wich lead of the door actuator you use

  8. #8
    Variable Bitrate quantum's Avatar
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    Sep 2005
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    Just taking the above diagram one step further, maybe you gould wire the relay to the dome light wire instead? Not sure how yours works, but my dome light only comes on when I hit the "unlock" button, not the "lock" button...

    Unless you WANT it to soft power off when you lock the doors, which might be a good thing, or a big fat PITA if you get in and out of it often.

  9. #9
    What can I say? I like serial. Curiosity's Avatar
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    A door lock actuator is usually forward or reverse polarity depending on lock or unlock, so the diagram Injector has work work well. You don't need the diode. Tap into one wire of the actuator and the relay will click for one direction and do nothing for the other. If it clicks when you lock the car then you connected to the wrong side.

    You'll also need to fake the ACC depending on the SDC or whatever power supply you are using, so you get power to the PC.

  10. #10
    Variable Bitrate rijk's Avatar
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    I use the diods to be on the save side, the alarm oparates the door, and i don't want to fry the alarm.

    The way i explaind worked for me over a year now.

    You might want to make 1 extra option, witch is, send an of to the bi-stabiel relais and have a second relais take over the remote wire, this way when you switch of the car, you don't need to lock the car for the mobo to be off.

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