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43 lines
1.1 KiB
Plaintext
43 lines
1.1 KiB
Plaintext
/*
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Mega analogWrite() test
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This sketch fades LEDs up and down one at a time on digital pins 2 through 13.
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This sketch was written for the Arduino Mega, and will not work on previous boards.
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The circuit:
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* LEDs attached from pins 2 through 13 to ground.
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created 8 Feb 2009
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by Tom Igoe
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*/
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// These constants won't change. They're used to give names
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// to the pins used:
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const int lowestPin = 2;
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const int highestPin = 13;
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void setup() {
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// set pins 2 through 13 as outputs:
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for (int thisPin =lowestPin; thisPin <= highestPin; thisPin++) {
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pinMode(thisPin, OUTPUT);
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}
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}
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void loop() {
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// iterate over the pins:
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for (int thisPin =lowestPin; thisPin <= highestPin; thisPin++) {
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// fade the LED on thisPin from off to brightest:
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for (int brightness = 0; brightness < 255; brightness++) {
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analogWrite(thisPin, brightness);
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delay(2);
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}
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// fade the LED on thisPin from brithstest to off:
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for (int brightness = 255; brightness >= 0; brightness--) {
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analogWrite(thisPin, brightness);
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delay(2);
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}
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// pause between LEDs:
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delay(100);
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}
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}
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