How to RGB LED Interfacing with ATtiny85 Microcontroller


RGB LED has great usage nowadays, usually used for decoration for different occasions. For example, they can use it in stage lighting, at parties, weddings, etc. It is an LED having three terminals, RGB in a color, red, green, and blue which are present. These three LEDs together produce a single intensity output light, and by adjusting the intensity of the internal single LED, we can get any needed output color light. The prominent part of this RGB LED is its features. For example, its small size occupies less area or space, it is less toxic and has greater efficiency. So, in this tutorial, we are going to interface “RGB LED with ATtiny85 Microcontroller”.

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Circuit Diagram


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int red_light_pin= 2;
int green_light_pin = 3;
int blue_light_pin = 4;
void setup() {
  pinMode(red_light_pin, OUTPUT);
  pinMode(green_light_pin, OUTPUT);
  pinMode(blue_light_pin, OUTPUT);
void loop() {
  RGB_color(255, 0, 0); // Red
  RGB_color(0, 255, 0); // Green
  RGB_color(0, 0, 255); // Blue
  //RGB_color(255, 255, 125); // Raspberry
  //RGB_color(0, 255, 255); // Cyan
  //RGB_color(255, 0, 255); // Magenta
  //RGB_color(255, 255, 0); // Yellow
  //RGB_color(255, 255, 255); // White
void RGB_color(int red_light_value, int green_light_value, int blue_light_value)
  analogWrite(red_light_pin, red_light_value);
  analogWrite(green_light_pin, green_light_value);
  analogWrite(blue_light_pin, blue_light_value);