How to Blink LED on Arduino Nano (Code In description) Complete Beginner Tutorial 2026

Step-by-step guide: How to make LED blink every 1 second on Arduino Nano using digital pin 2 (D2).
Best first Arduino project for complete beginners in 2026!
Great for school projects, ECE students, Arduino hobbyists!
Requirements for the project :- Breadboard, Arduino Nano, LED, 100 ohm resistor, Jumper Wires, Battery or adapter, Computer/Mobile.
install app Arduino IDE for pc/laptop or Arduino Droid for mobile


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Software link :-https://www.arduino.cc/en/software/

Code:
// LED Blinking every 1 second
// LED connected to digital pin D2

#define LED_PIN 2 // LED is connected to pin D2

void setup() {
pinMode(LED_PIN, OUTPUT); // Set pin D2 as output
// digitalWrite(LED_PIN, LOW); // Optional: start with LED off
}

void loop() {
digitalWrite(LED_PIN, HIGH); // LED ON
delay(1000); // Wait 1 second

digitalWrite(LED_PIN, LOW); // LED OFF
delay(1000); // Wait 1 second
}