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Thread: Wiring Help - Relays

  1. #11
    Senior Member Carroll Shelby Fbody383's Avatar
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    Quote Originally Posted by Alien View Post
    Yes and no. The ground IS there. It just goes thru the LED's first.
    But voltage drop across the LEDs. Should not be any "load" in the switch circuit.
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  2. #12
    Senior Member Grass-Passer Alien's Avatar
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    Yup tho still not an absolute statement. The load just needs to be less than 2V

    My first mistake was thinking the relay was triggered by amps. Once that got corrected in my head, messed up by thinking that since the LEDs draw low amps (which I assumed as "load"), so they must have a low voltage drop also, and I could get away with using them as the switch circuit. Once I found the relay needs 8-9 volts to trip (wouldn't have guessed it would be that high) and the LEDs themselves are 3V-5V, then it made sense why it didn't work.

    I would have gotten away with it if it wasn't for you meddling kids!
    Last edited by Alien; 07-19-2016 at 05:19 PM.
    - Gary R.
    '86 Camaro Z28 "KNOCKER"

  3. #13
    Senior Member Carroll Shelby Supercharged111's Avatar
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    I see what you're saying now about voltage vs amperage because they're wired in series, but the relay coil is not meant to carry any sort of load. You should not be powering anything off of 86.

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