Code-Bin #638 - Arduino RGB LED Fade

Arduino RGB LED Fade
Posted by: Jon Mulligan | May 8, 2010 @ 3:52pm

C Code

int ledPinb = 11;    // Blue LED connected to digital pin 11
int ledPing = 10     // Green LED connected to digital pin 10 
int ledPinr = 9;     // Red LED connected to digital pin 9

void setup()  { 
  // nothing happens in setup 
}

void loop()  { 
  // Green to Blue
  for(int fadeValueb = 0, fadeValueg = 255, fadeValuer =0; fadeValueb <= 255, fadeValueg >= 0; fadeValueb +=5, fadeValueg -=5){
    // sets the value (range from 0 to 255):
    analogWrite(ledPinb, fadeValueb); analogWrite(ledPing, fadeValueg); analogWrite(ledPinr, fadeValuer);
    //30 milliseconds to see the dimming effect    
           delay(30);   
  }
// Blue to Red
  for(int fadeValueg = 0, fadeValueb = 255, fadeValuer = 0; fadeValueg <= 0, fadeValueb >= 0, fadeValuer <= 255; fadeValueg +=0, fadeValueb -=5, fadeValuer +=5){
    // sets the value (range from 0 to 255):
    analogWrite(ledPing, fadeValueg); analogWrite(ledPinb, fadeValueb); analogWrite(ledPinr, fadeValuer);
    //30 milliseconds to see the dimming effect    
           delay(30);             
  }

// Red to Green
  for(int fadeValueg = 0, fadeValueb = 0, fadeValuer = 255; fadeValueg <= 0, fadeValueb >= 0, fadeValuer >= 0; fadeValueg +=5, fadeValueb -=0, fadeValuer -=5){
    // sets the value (range from 0 to 255):
    analogWrite(ledPing, fadeValueg); analogWrite(ledPinb, fadeValueb); analogWrite(ledPinr, fadeValuer);
    //30 milliseconds to see the dimming effect    
           delay(30);             
  }

}

// Based on the arduino source code
// Modified by Jon Mulligan

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Author Comments

This code allows 3 leds (red, green, blue) to cycle through the
spectrum.

Rating

4.77 / 8
73 Votes