In this tutorial, we will learn how to interface an RGB led with Arduino. An RGB led consist of three Led’s namely red, green and blue inside a single package. It is having three pins the longer one(2) is the GND(in the case of the common cathode) and the other three pins represent the three colours. You all must have heard about the RGB colour model, it is a model representing the colours that can be generated with the combination of three basic colours. Now let’s interface the led and have some fun with it. Components required Resistor 1No. 200 ohms RGB led 1No. Arduino UNO 1No. Few connecting wires Follow the video below for circuit connection reference. After making the circuit connections dump the code given below. int led1 = 3; int led2 =5; int led3 =6; void setup() { pinMode(led1, OUTPUT); pinMode(led2, OUTPUT); pinMode(led3, OUTPUT); } void loop() { digitalWrite