RGB_dial

gistfile1.ino

// Gray text with two slashes are just helpful comments, you don’t need to type them. :)

/******* -----=====!! EASY STUFF TO MESS WITH !!=====------ ******/

  // What analog pin should we use to read the value from the potentiometer?
  int analogPin = 2; // Yep, you heard right: The coolest of the Analog pins...

  // What pins are the LEDs connected to?
  int redPin = 9;
  int greenPin = 10;
  int bluePin = 11;
  int whitePin = 6;

/******* -----=====^^ EASY STUFF TO MESS WITH ^^=====------ ******/

void setup() {
  pinMode(redPin, OUTPUT); // Setup ledPin as an output.
  pinMode(greenPin, OUTPUT); // Setup ledPin as an output.
  pinMode(bluePin, OUTPUT); // Setup ledPin as an output.
  pinMode(dimmerPin, OUTPUT);
}

void loop() {
  int analogValue = map(analogRead(analogPin), 0, 1023, 0, 255);
  int r, g, b;
  analogWrite(dimmerPin, analogValue);
  
  if (analogValue < 85) {
    r = 255 - analogValue * 3;
    g = 0;
    b = analogValue * 3;
  } else if (analogValue < 170) {
    analogValue -= 85;
    r = 0;
    g = analogValue * 3;
    b = 255 - analogValue * 3;
  } else {
    analogValue -= 170;
    r = analogValue * 3;
    g = 255 - analogValue * 3;
    b = 0;
  }
  
  analogWrite(redPin, r);
  analogWrite(greenPin, g);
  analogWrite(bluePin, b);
  delay(50);
}