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Thread: Question about Power Supply to Switches

  1. #1
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    Question about Power Supply to Switches

    I was looking at the Shutdown controller and saw another thread regarding a Quick Disconnect Box via Cat5. There are several points on the controller that switches can be hooked to. Can Cat5 cable(s) be used to connect the switches to the shutdown controller? A lot of the switches are described as features I might want in a car computer and would like a quick way to run a cable to them quickly.

  2. #2
    MySQL Error MatrixPC's Avatar
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    I run all my switches, LEDs. 4 wires for 2 LED and 4 wires for 2 switch.
    2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
    89 Supra Turbo P3 600E@750/Abit BE6 II, Alpine M-BUS Car2PC.
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  3. #3
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    Quote Originally Posted by MatrixPC
    I run all my switches, LEDs. 4 wires for 2 LED and 4 wires for 2 switch.
    So CAT5 cable probably won't do for switches?

  4. #4
    Newbie techboj's Avatar
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    Cat 5 cabling should only be use for very small or temporary loads. All my computer switches (power, reset) and LED's - I moved them to the front using Cat5 cable and serial M-F connectors. The computer switches are fine because these are only momentary switches.

    Anything bigger and you have to use the proper gauge of wire. Depending on your shutdown controller, you shouldn't be going for any smaller gauge wire - basically match wire size with load reqt's.
    Carputer revision !! (arghh - getting costlier than originally expected )
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    Quote Originally Posted by MatrixPC
    I run all my switches, LEDs. 4 wires for 2 LED and 4 wires for 2 switch.
    you know, quite often you can cut the number of wires in half if one terminal of the switch or LED is grounded... for instance, in the computer, one terminal of the motherboard power switch is grounded, and one terminal of the power LED is grounded, so I only had to run one wire for each of them, since the computer is grounded to the chassis I can just hook up the other ends of the switch/LED up front to the chassis as well. if you're doing any custom hardware, you can design your circuits this way to minimize the number of wires you have to run
    But don't take it from me! here's a quote from a real, live newbie:
    Quote Originally Posted by Viscouse
    I am learning buttloads just by searching on this forum. I've learned 2 big things so far: 1-it's been done before, and 2-if it hasn't, there is a way to do it.
    eegeek.net

  6. #6
    MySQL Error MatrixPC's Avatar
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    Quote Originally Posted by evandude
    you know, quite often you can cut the number of wires in half if one terminal of the switch or LED is grounded... for instance, in the computer, one terminal of the motherboard power switch is grounded, and one terminal of the power LED is grounded, so I only had to run one wire for each of them, since the computer is grounded to the chassis I can just hook up the other ends of the switch/LED up front to the chassis as well. if you're doing any custom hardware, you can design your circuits this way to minimize the number of wires you have to run
    You are right about running common ground. That is what I used in my Supra. 2 CAT 5 cable solder to a 15pins (VGA M-F connector) for all my switches, LEDs, IR receiver.
    In my Matrix, the setup is a little different. Just a single cat5 with 9pin (serial M-F) connector.
    But the PC power LED and HD LED are Ground enable/switch/flash. So I can't do the combine ground.
    The other 2 switches are not really commond. 1 for the SDC kill switch which is + signal. The PC PWR switch is ground.
    2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
    89 Supra Turbo P3 600E@750/Abit BE6 II, Alpine M-BUS Car2PC.
    Y2K Accord Dell GX150
    RoadRunner is the best FE PERIOD
    EmoRebellion is a SCAMMER

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    Thanks! You've answered my question.

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