Arduino Starter Project: Blink LED on Button Press

Project Overview

This beginner project teaches you how to blink an LED when a button is pressed using Arduino.

Parts List

• Arduino Uno (or compatible)
• LED (any color)
• 220Ω resistor
• Momentary push button
• Breadboard
• Jumper wires

Wiring Diagram

Arduino Code (Click to Expand)

const int buttonPin = 2;
const int ledPin = 13;
int buttonState = 0;

void setup() {
  pinMode(buttonPin, INPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  buttonState = digitalRead(buttonPin);

  if (buttonState == HIGH) {
    digitalWrite(ledPin, HIGH);
    delay(200);
    digitalWrite(ledPin, LOW);
    delay(200);
  } else {
    digitalWrite(ledPin, LOW);
  }
}
    

LED Blink Simulation

Your LED should blink like this: