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Wiring help for Rearview Camera

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  • Wiring help for Rearview Camera

    Hey,

    I want to not only be able to have the camera automatically turn on when the reverse lights kick in, but ALSO turn on when I flip a switch in the cabin. So here's a little circuit design I have, and I was wondering whether anyone could help me figure out resistor values, transistor requirements, etc... and just see whether it would work some simpler way.

    Since I cant just do the simple 'power the camera from the reverse lights' trick, I have to find a new source of power. I could just tap the power from my distro block that's back there for the amps & carputer. Always having power would mean always having the cam active, so here are the two ways I plan on turning it on and off.

    Right now I have 2 switches up in the cabin (see my sig for details, if you're interested). One of which is disposable now. The other interrupts the ACC signal en route to the Opus. I was thinking of splitting that signal immediately upstream of the switch and having both switches be ACC switches. Send the new switch to one of two transistors installed in parallel between the distro block and the camera. The other transistor, of course, comes from the backup lights.

    Result, hopefully, would be that the camera would turn on EITHER when the reverse lights come on or when the switch is turned on.

    So I probably need a resistor between the reverse lights and the one transistor; and maybe one between the switch and that transistor. How do I know what strength resistors do I need?

    Thanks for any help.
    A car without turbo is a car with perpetual lag.

    My Ride
    My New Page

  • #2
    is there a reason you can't hook into the reverse lights wire?
    99.9% complete.

    http://www.cardomain.com/ride/212327

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    • #3
      Because I want to be able to flip the interior switch and turn on the camera even if I'm not in reverse.
      A car without turbo is a car with perpetual lag.

      My Ride
      My New Page

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      • #4
        Connect the camera to the reverse lights, and put a switch also with power coming from somewhere else ( when you flick the switch the reverse lights + cam go on).

        Thats the simplest way to go, in the same time you benefit from the light showing on the ground. You can also add an isolator on the brake light original wire so power doesnt go back to wherever.

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        • #5
          Originally posted by kevinlekiller
          Connect the camera to the reverse lights, and put a switch also with power coming from somewhere else ( when you flick the switch the reverse lights + cam go on).

          Thats the simplest way to go, in the same time you benefit from the light showing on the ground. You can also add an isolator on the brake light original wire so power doesnt go back to wherever.
          An interesting idea, but I dont want the reverse light going on everytime I turn on the camera. That seems like an unnecessary side effect for a not much simpler solution.

          Anyone have any idea whether I need to use those resistors and if so, how powerful?
          A car without turbo is a car with perpetual lag.

          My Ride
          My New Page

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          • #6
            Wait, Im an idiot , I was overthinking this ; its as simple as this
            Attached Files

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            • #7
              Bravo. That is a SPDT (single pole, double throw) switch. Camera goes to the common.
              ~Jimmy

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              • #8
                you can also connect wire it and connect the trigger switch to reverse gear led, and manual as well

                Yev
                R. T. F. M

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                • #9
                  Yea, just make sure to fuse.

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                  • #10
                    Hi Buddy,
                    Can I ask what camera you'll be using and were u plan on mounting it? Wanting to do something similar.
                    New Car PC Build list in progress

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