The classic Arduino "Hello World" — blink an LED on and off. Turns an LED connected to pin 13 on for one second, then off for one second, repeatedly. The simplest possible Arduino project, perfect for verifying your setup and learning digital output. Uses a 220Ω current-limiting resistor.
Cite this design
@design{examples/arduino-traffic-light,
title = {Arduino LED Blink},
author = {examples},
url = {https://breadboardhub.com/examples/arduino-traffic-light},
version = {1.0.0}
}