Blinking LED with Arduino Uno

In this tutorial, we learn about how to blink LEDs using Arduino. This LED Blink Arduino tutorial includes everything about the wiring and programming of this project.

Arduino Uno - LED Blinking

Required Hardware -

1 * Arduino Uno Board

1 * LED

1 * 220-ohm Resistor

1 * Breadboard

2 * Jumper Wires

  • You can buy these components from Amazon by clicking on it

Video Tutorial For This Project

Here is a video tutorial for this project. You can do your whole project with this video.

Credits – techteachervideo

About LED

red led pinout schematic
  • Cathode (-) always needs to be connected with GND.
  • Anode (+) connects with the control LED’s state. (Ex- 13 pin in Arduino Uno board).

Wiring Diagram

diagram for arduino led blink
  • Connect Arduino Board GND pin to LED light (-) pin with a jumper wire.
  • Then, connect Arduino Board 13 pin to LED (+) pin with a remaining jumper wire.
  Blinking LED project.
  Turns on an LED on for one second, then off for one second, repeatedly.
  Last Modification modified 30 March 2020
  by Roy Ben Avraham

// 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


Feel free to ask any questions about this project in the comment section. Thank you.

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