Introduction: Arduino - Blinking LED

This is my first project with Arduino in instructables, but I create robots for few years with arduino.

The first I want I show you is The magic Hello World , that in electronics means Blinking LED!

Step 1: What Do You Need :

  1. Arduino - I have a diferent versions but I wanna use Arduino Duemilanove and iDuno.
  2. Led Resistor - you can calculate but I generally use 220ohm.
  3. Wire.

Step 2: Parts & Schema

The protoboard I use to be more easy the wired.

Insert led check out how I put the led in the schematic is the position,
Connect the resistor to the led, and connect pin 13 on your arduino to a spot on yhe breadboard.

Step 3: Software

For this Arduino create some small tutorial programs that just you can download into the microcontrollers.

  1. open the Files
  2. go to the Sketch Book
  3. go to examples
  4. then to Digital
  5. and open 'Blink'

when you done with this go to the upload button above the screen and select it when its done you see the led starts to blink.

Step 4: Code

This is basically the code:

First create a variable call led with a value 13 that is the pin in the arduino.

With pinMode we put our variable in OUTPUT mode , that means that the pin of arduino is waiting for a signal to pass to the led.

In the loop we change the signal from high to low, that permite to us see the blink!!!

int led = 13;

void setup() {

pinMode(led, OUTPUT);


void loop() {

digitalWrite(led, HIGH);


digitalWrite(led, LOW);



Step 5: Videos