Tutorial 01: blinks an LED

This example shows the simplest thing you can do with an Arduino to see physical output: it blinks an LED.

/*
  Blink
  Turns on an LED on for one second, then off for one second, repeatedly.
 

 */

// Pin 13 has an LED connected on most Arduino boards.
// give it a name:
int led = 13;

// the setup routine runs once when you press reset:
void setup() {              
  // initialize the digital pin as an output.
  pinMode(led, OUTPUT);    
}

// the loop routine runs over and over again forever:
void loop() {
  digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);               // wait for a second
  digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);               // wait for a second
}

 Download this sketch :  http://ouo.io/0epa5F