Arduino RGB LED : Arduino 14th Lesson of Arduino Tutorial

In the previous lesson, we have learned about how to control motion sensor using Arduino. Today we are going to learn about how to control RGB led using Arduino. Let’s get started.

What is RGB led?

RGB led is a LED type, which contains Red, Green, Blue colors together. You can change the R, G, and B values and make any color in this world. That is the main use of RGB light. Below is the diagram of RGB mixing. It can create every visible color on this earth.

With RGB light, you don’t have to buy much more LEDs in different colors. You can do it with a single RGB LED.

RGB LED has 4 pins. One is GND. You all know about what is GND. So, other 3 pins are R, G, and B. stands for red and in order to others are green and blue. So, you can get those colors by making those pins “HIGH”. You can change the brightness of each pin and get different kind of colors. Blow is the pinout of RGB led.

You have to make the circuit like below to get a work from RGB LED.

Blinking red, blue and green.

In this part, we are going to turn on and off red, green, and blue colors. To do that, you have to make the code like below. And also, you can test it right now using below start simulation button.

In the void setup of this code, I initialized 6^th, 7^th, 8^th pins as outputs. Then inside the void loop, I put command to make 6^th pin (Red) high. Then I added 1 second delay and then I put command to make 7^th pin (Blue) high and make 6^th pin (Red) low. After that again 1 second delay. Then I added command to turn on the 8^th pin (Green) and make low 7^th pin (Blue). Then again 1 second delay.  At the last line of void setup, I put command to turn off the 8^th pin (Green).

Making different colors using RGB LED.

Circuit diagram is same as before one.

This code is very simple. Its void setup is same as before code. In this code’s void loop, I put 6^th and 7^th pin HIGH together. That means red and blue together. That makes purple color. Like that you can make any color. Then 1 second delay. After that, I turned off 6^th pin and still 7^th pin is high. I turn on 8^th pin in the next line. It means blue with green. Result is light blue color. Again 1 second delay and then 6^th pin with 8^th pin. It makes yellow color. Try it out.

Making much more colors.

In this code, I put values instead of HIGH. You have learned about putting values instead of HIGH or LOW. So, that this makes color low or high. You can choose RGB colors by pressing below button.

If you have any problem, please comment below. Good Bye. Stay connected.