This example is for Wiring version 0024+. If you have a previous version, use the examples included with your software. If you see any errors or have comments, please let us know.
switch by BARRAGAN http://barraganstudio.com
Demonstrates the use of digital pins and a switch. The pin used as input is connected to a switch and the pin used as output is the onboard LED When the switch is pressed, the light blinks, the light goes off when the switch is released.
Demonstrates the use of digital pins and a switch. The pin used as input is connected to a switch and the pin used as output is the onboard LED When the switch is pressed, the light blinks, the light goes off when the switch is released.

int direction = 1; // used for the blinking cycle int switchPin = 0; // digital pin to attach the switch int ledPin = 48; // Wiring onboard LED void setup() { pinMode(switchPin, INPUT); // sets digital pin 0 as input pinMode(ledPin, OUTPUT); // sets digital pin 48 as output } void loop() { if(digitalRead(switchPin) == HIGH) // if the switch is pressed { direction *= -1; // alternate between 1 or -1 if (direction == 1) // to decide to turn on or off the light { digitalWrite(ledPin, HIGH); // turns the light on } else { digitalWrite(ledPin, LOW); // turns the light off } delay(200); // wait 200 milliseconds } else // if switch not pressed { digitalWrite(ledPin, LOW); // keeps the light off } }