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Using Red-Green-Blue (RGB) LEDs with Arduino (Common Cathode Type)

In this tutorial we describe using RGB LEDs of the Common Cathode Type.  We will describe setting up the circuit, talk about the LED and discuss the code used to adjust the hue.


  1. Avatar patrickd314 on November 24, 2016 at 6:15 pm

    Careful, viewers: The schematic omits the series resistors (which were included on the breadboard.)

  2. Avatar Sravan Mutharasu on March 14, 2017 at 9:11 am

    Weird! I followed everything to the dot. However, connecting the ground pin to the ground lead of the RGB LED doesnt turn on the LED, but not connecting the ground pin to one of the leads of R,G turns the LED On.. I suppose the RGB LED is broken?

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