Summary of Blink Arduino Sketch
This article presents the standard Arduino Blink sketch that toggles the onboard LED on digital pin 13 on and off, each state lasting one second. It initializes pin 13 as an output in the setup function, then continually switches the LED on and off in the loop function with one-second delays. The code is simple, suitable for beginners, and demonstrates basic digital output control on an Arduino board.
Parts used in the Blink Arduino Sketch:
- Arduino board (e.g., Arduino Uno or Leonardo)
- On-board LED connected to digital pin 13
- USB cable (for programming and power)
This is a standard Arduino example sketch, copied here for reference.
Full Source Code
The full code is all in one file Blink.ino.
/*
Blink
Turns on an LED on for one second, then off for one second, repeatedly.
Most Arduinos have an on-board LED you can control. On the Uno and
Leonardo, it is attached to digital pin 13. If you're unsure what
pin the on-board LED is connected to on your Arduino model, check
the documentation at http://www.arduino.cc
This example code is in the public domain.
modified 8 May 2014
by Scott Fitzgerald
*/
// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin 13 as an output.
pinMode(13, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(13, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}Source: Blink Arduino Sketch
