Build Instructions

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• 1

  Step 1

  Each press of the button cycles the LED colors. It turns off after red.

  Just wire it up and upload the following code.

• 2

  Step 2

  int redPin = 3;
  int greenPin = 5;
  int bluePin = 6;
  int buttonPin = 2;
  int initialCount = 0;
  
  //uncomment this line if using a Common Anode LED
  #define COMMON_ANODE
  
  void setup()
  {
    pinMode(redPin, OUTPUT);
    pinMode(greenPin, OUTPUT);
    pinMode(bluePin, OUTPUT);
    pinMode(buttonPin, INPUT_PULLUP);
     setColor(0,0,0);
  }
  
  void loop()
  {
    int buttonState = digitalRead(buttonPin);
    if ( buttonState == LOW ){
      delay(500); //delay for debounce
      initialCount++;
      if (initialCount > 4 ){
        initialCount = 0;
      }
      switch (initialCount){
        case 0:
          setColor(0,0,0);
          break;
        case 1:
         setColor(0, 255, 0);  // green
          break;
        case 2:
          setColor(0, 255, 255);  // aqua
          break;
        case 3:
         setColor(0, 0, 255);  // blue
          break;
        case 4:
         setColor(255, 0, 0);  // red
         break;
      }
  
    }
  
  }
  
  void setColor(int red, int green, int blue)
  {
    #ifdef COMMON_ANODE
      red = 255 - red;
      green = 255 - green;
      blue = 255 - blue;
    #endif
    analogWrite(redPin, red);
    analogWrite(greenPin, green);
    analogWrite(bluePin, blue);  
  }

• 3

  Step 3

View all 3 instructions