Blinky, is your first experiment in the world of Arduino. Let's blink! We will connect a LED to pin 13 of Arduino and turn it ON/OFF every second.

Sandeep (talk) 16:13, 4 March 2016 (IST)

Hook Up

Aurduino Blink a LED.JPG


  Blink a LED
  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