Example 1-2 - PWM

example1-2.ino

int i = 1000;

void setup()
{                
  pinMode(3, OUTPUT);     // sets digital pin 3 to an output
  pinMode(6, OUTPUT);     // sets digital pin 6 to an output  
}

void loop()
{
  analogWrite(3, 255); // 100% duty cycle
  analogWrite(6, 255); // 100% duty cycle  
  delay(i);  
  analogWrite(3, 191); // 75% duty cycle
  analogWrite(6, 191); // 75% duty cycle  
  delay(i);  
  analogWrite(3, 127); // 50% duty cycle
  analogWrite(6, 127); // 50% duty cycle  
  delay(i);
  analogWrite(3, 63); // 25% duty cycle
  analogWrite(6, 63); // 25% duty cycle  
  delay(i);
}