In this project, we’ll learn how to make a traffic light. It’s a simple project that helps you understand how to control LEDs one after another and manage delays to see the lights turn on.
An Arduino Uno board
3 LEDs (red, orange, green)
3 resistors (220 ohms)
A breadboard
4 jumper wires
Resistors are used to limit the current in your LEDs and therefore prevent them from burning out.