Tangible User Interfaces - Fall 2011

Materials: LED, 220 ohm resistor

/*
  Blink
  Turns on an LED on for three seconds, then off for three seconds, repeatedly.
 
  This example code is in the public domain.
 */

void setup() {                
  // initialize the digital pin as an output.
  // Pin 13 has an LED connected on most Arduino boards:
  pinMode(13, OUTPUT);     
}

void loop() {
  digitalWrite(13, HIGH);   // set the LED on
  delay(3000);              // tim makes it wait for 3 seconds
  digitalWrite(13, LOW);    // set the LED off
  delay(3000);              // tim makes it wait for 3 seconds
}