[tutorial] How to use an RGB LED


An RGB LED has 4 pins, one for each color (Red, Green, Blue) and a common cathode. It has tree different color-emitting diodes that can be combined to create all sorts of color! Any color is possible depending on how bright each diode is.

Watch the following video:

In this tutorial you will learn how to use an RGB LED with Arduino and create unique color combinations.

So, let’s get started!

What you will need

For this tutorial you will need:

  • Arduino uno
  • Breadboard
  • 3x 330Ohm resistors

The Circuit

The connections are pretty easy, see the image above with the breadboard circuit schematic.

The Code

Here’s the code, embedded using codebender!

We will use code from SparkFun Inventor’s Kit – SIK Guide, Example sketch 03. This is the best sketch to learn how an RGB LED works. The code is pretty self-explanatory, and the comments do a better job than me explaining how it works.

Try downloading the codebender plugin and clicking on the Run on Arduino button to program your Arduino board with this sketch. And that’s it, you’ve programmed yourArduino with the RGB LED sketch!

Well done!


You have successfully completed one more Arduino “How to” tutorial and you learned how to use an RGB LED with Arduino.

One Comment

  1. Amandine

    24 Nov 2015 07:17:09

    Very good explanation on RGB Led. Thank you for the share.

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