How to wire a system with two drivers?- Mtbr.com
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  1. #1
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    How to wire a system with two drivers?

    I have two small boards which can only provide 500mA each and want to use them in series to feed two leds in series at 1000mA.

    How do I need to connect the battery -> both drivers -> both leds?

    Thanks!!

  2. #2
    Randomhead
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    I doubt you can do what you want. If anything, you would have to put the drivers in parallel

  3. #3
    Carbon8er
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    Don't know which boards you are using, but yes, you probably have to wire them in parallel.

    I have info here on how I use two 1400ma boards in parallel to get 2800ma
    http://www.el34world.com/Misc/bike/BikesLights26.htm

  4. #4
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    I believe if you wire the drivers in parallel and the LEDs in series, then that would provide what you are looking for.
    (remember: current ≠ voltage)
    --Ian
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  5. #5
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    Quote Originally Posted by El34
    Don't know which boards you are using, but yes, you probably have to wire them in parallel.

    I have info here on how I use two 1400ma boards in parallel to get 2800ma
    https://www.el34world.com/Misc/bike/BikesLights26.htm

    Saw your diagram but don't know if I did understand it completely. Getting rid of the switch woul this be correct? It's a conectino of two equal drivers to have their Ah added to just one only LED.


  6. #6
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    Quote Originally Posted by ianrab
    I believe if you wire the drivers in parallel and the LEDs in series, then that would provide what you are looking for.
    (remember: current ≠ voltage)
    Yes, with current I meant mA and not volts.
    Is the diagram I put correct for a one led config?

  7. #7
    Carbon8er
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    looks good except that you only need to jumper the + terminals once.
    The battery connection below already jumpers the + terminals

    The simple way to think of it is like this.

    Hook up Board1 the normal way you would.
    Board2 gets jumpers from Board1 over to Board2 to the exact same hookup points

    If you wanted to add 3 or 4 boards, you just keep jumpering each board to the next board.




    And this would be two led's in series


  8. #8
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    Quote Originally Posted by El34
    looks good except that you only need to jumper the + terminals once.
    The battery connection below already jumpers the + terminals

    The simple way to think of it is like this.

    Hook up Board1 the normal way you would.
    Board2 gets jumpers from Board1 over to Board2 to the exact same hookup points

    If you wanted to add 3 or 4 boards, you just keep jumpering each board to the next board.




    And this would be two led's in series


    Perfectly explained mate!! Fully understood now with both your text and drawing

  9. #9
    Carbon8er
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    excellent.
    see ya

  10. #10
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    Quote Originally Posted by El34
    Don't you need to do something with the outputs from the second board? (And, if not, why???)

  11. #11
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    yes, that is just a simple diagram illustrating the parallel concept

    The driver boards I use have 3 connection points.

    battery +
    battery -
    and LED - that is fed from the current limiting cicuitry

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