Blink an LED (Hello World)

This project blinks an external LED connected to an Arduino Nano.

Nano LED Blink

This project blinks an external LED connected to an Arduino Nano.

Hardware & Wiring

Components

  • 1x Arduino Nano
  • 1x LED (Any color)
  • 1x 220Ω Resistor
  • Jumper wires
  • Breadboard

Wiring Diagram

   Arduino Nano        LED Circuit
   [ D8 ] ------------ [ 220Ω ] ----( + Anode ) LED ( - Cathode )---- [ GND ]

Pin Mappings

Component Pin Arduino Pin
LED (+) Anode D8
LED (-) Cathode GND

Description

The LED turns on for 1 second and then turns off for 1 second repeatedly.

Author

RS
Rishabh Sin s Sinha
Published Jan 7, 2026