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- /*
- Fading
- This example shows how to fade an LED using the analogWrite() function.
- The circuit:
- - LED attached from digital pin 9 to ground.
- created 1 Nov 2008
- by David A. Mellis
- modified 30 Aug 2011
- by Tom Igoe
- This example code is in the public domain.
- http://www.arduino.cc/en/Tutorial/Fading
- */
- int ledPin = 9; // LED connected to digital pin 9
- void setup() {
- // nothing happens in setup
- }
- void loop() {
- // fade in from min to max in increments of 5 points:
- for (int fadeValue = 0 ; fadeValue <= 255; fadeValue += 5) {
- // sets the value (range from 0 to 255):
- analogWrite(ledPin, fadeValue);
- // wait for 30 milliseconds to see the dimming effect
- delay(30);
- }
- // fade out from max to min in increments of 5 points:
- for (int fadeValue = 255 ; fadeValue >= 0; fadeValue -= 5) {
- // sets the value (range from 0 to 255):
- analogWrite(ledPin, fadeValue);
- // wait for 30 milliseconds to see the dimming effect
- delay(30);
- }
- }
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