| /* | |
| Fading | |
| This example shows how to fade an LED using the analogWrite() function. | |
| The circuit: | |
| - LED attached from digital pin 9 to ground through 220 ohm resistor. | |
| created 1 Nov 2008 | |
| by David A. Mellis | |
| modified 30 Aug 2011 | |
| by Tom Igoe | |
| This example code is in the public domain. | |
| https://www.arduino.cc/en/Tutorial/BuiltInExamples/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); | |
| } | |
| } | |