Tutorial 3: RGB LED 16 million colors

Please refer to my previous blog for the completed circuit for the RGB LED animation. In the previous blog we are showing 3 primary colors( red, green, and blue), but in this project we will show ALL 16 million colors. The program below is the code for showing 16 million colors.

int redPin= 11;
int greenPin= 9;
int bluePin= 10;


void setup()
{
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin,OUTPUT);
}

void loop()
{
for(int red=0; red<255; red++)
{
  for( int green=0; green<255; green++)
  {
    for( int blue=0; blue<255; blue++)
    {
      analogWrite(redPin,red);
      analogWrite(greenPin,green);
      analogWrite(bluePin,blue);
      delay(1);
    }
  }
}
  
}

Obviously, we are not writing all 16 million lines to complete the program. We are using a for loop to write a few lines to show all 16 million colors. In the program above, you can see 3 nested for loops to set a value for 3 different pins.