This was a fun project with four RGB LED’s and an Arduino.
Version 1 made for Arduino UNO (shown with Leonardo):
Version 2 made for Arduino Nano (shown in the video):
I don’t have a very good circuit diagram at the moment, but here’s the fritzing file: RGBLed.fzz
Code on GitHub.
This was a fun and easy project to help me wrap my mind around some basic electronics principles.
The circuit is made of a few resistors, transistors, capacitors and LEDs. I got the circuit diagram from: http://wild-bohemian.com/electronics/flasher.html
I used Fritzing to help me design the layout. Grab my file here.