LEDIntensity \ Learning \ Wiring ALPHA 1.0

This example is for Wiring version 0024+. If you have a previous version, use the examples included with your software. If you see any errors or have comments, please let us know.

Fading in/out, controlling an LED Intensity by BARRAGAN

Demonstrates the use of PWM pins (analog output) by dimming a light (LED) from off to maximum intensity and back.


int ledpin = 37;  // light connected to PWM pin 37

void setup()
{
  // nothing for setup 
}

void loop()
{
  for(int value = 0 ; value <= 1023; value+=5)  // fade in (from min to max)
  {
    analogWrite(ledpin, value);             // sets the value (range from 0 to 1023)
    delay(30);                              // waits for 30 milli seconds to see the dimming effect
  }
  for(int value = 1023; value >=0; value-=5)    // fade out (from max to min)
  {
    analogWrite(ledpin, value);
    delay(30);
  }  
}