| /* |
| Fade |
| |
| This example shows how to fade an LED on pin 9 |
| using the analogWrite() function. |
| |
| This example code is in the public domain. |
| */ |
| |
| int led = 9; // the pin that the LED is attached to |
| int brightness = 0; // how bright the LED is |
| int fadeAmount = 5; // how many points to fade the LED by |
| |
| // the setup routine runs once when you press reset: |
| void setup() { |
| // declare pin 9 to be an output: |
| pinMode(led, OUTPUT); |
| } |
| |
| // the loop routine runs over and over again forever: |
| void loop() { |
| // set the brightness of pin 9: |
| analogWrite(led, brightness); |
| |
| // change the brightness for next time through the loop: |
| brightness = brightness + fadeAmount; |
| |
| // reverse the direction of the fading at the ends of the fade: |
| if (brightness == 0 || brightness == 255) { |
| fadeAmount = -fadeAmount ; |
| } |
| // wait for 30 milliseconds to see the dimming effect |
| delay(30); |
| } |
| |
