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Brain Jr. RGB LED Wiring


I am currently trying to use a RGB LED with my Brain Jr., however I am unable to get it to light up. I purchased the header from Futurlec as recommended in the Livid Wiki since the LED breakout shield is no longer available (, and then I wired the LED to the brain as instructed, but I'm still unable to get the LED to light up. Can someone help me out and provide a detailed step-by-step process on how to properly connect an RGB light to the Brain Jr.?

Thanks for the support!



  • Hi Sias,
    What LED are you using?
    Can you send a picture of your wiring?

    In short, all of the LEDs respond to MIDI Note On Messages. I can be more specific once you send responses to the other questions.

    Note: The header that you linked is not the correct size for a BrainJr. (though you likely got it to work with those long legs). The spacing of the BrainJr Pins is actually 2mm. (your linked part is 2.54mm).


  • Hey Justin,

    Thanks for your help! I tried 2X5x7 rectangular diffused anode LED's. I followed the directions provided on the LIVID wiki for the brain jr. Here is a picture, not sure if the file will work:

    I've been struggling pretty bad, so I appreciate your help



  • Hi Josias,

    The picture didn't come through.
    Can you please email it to ?

  • Not a problem, I'll send now. Thanks again

  • Update: We solved this in our email thread.

    There was a wiring issue, so I provided this description which helped sias313 get it going.

    That wiring is incorrect.
    I see in our documentation where you got this impression. (Wiki image shows a single 'bus' wire running to all pins on the LED).

    Let me give you the easiest hookup here for a single RGB LED:

    Anode:  Connect to Column 1 (any of the 4 Column 1 pins)
    Red Cathode: Connect to Row 1
    Green Cathode: Connect to Row 2
    Blue Cathode: Connect to Row 3

    If you do this, your RGB LED will be positioned to work as LED ID 0.

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