RGB Multi color light interface with Arduino Uno

 

Circuit Diagram

Program Code

int redPin = 11; // Pin connected to red leg of the RGB LED

int greenPin = 10; // Pin connected to green leg of the RGB LED

int bluePin = 9; // Pin connected to blue leg of the RGB LED

void setup() {

setRgb(0, 0, 0); // Set all colors at 0

}

void loop() {

int Rgb[3]; // 3 RGB pins

Rgb[0] = 0; // A value for each

Rgb[1] = 0;

Rgb[2] = 0;

// Colors increase and decrease in value

for (int decrease = 0; decrease < 3; decrease += 1) {

int increase = decrease == 2 ? 0 : decrease + 1;

for (int i = 0; i < 255; i += 1) { // Fade the colors

Rgb[decrease] -= 1;

Rgb[increase] += 1;

setRgb(Rgb[0], Rgb[1], Rgb[2]);

delay(20);

}

}

}

void setRgb (int red, int green, int blue) {

analogWrite(redPin, red);

analogWrite(greenPin, green);

analogWrite(bluePin, blue);

}