Crossing — Single Set Traffic Lights

This project simulates a single pedestrian crossing controlled by one set of traffic lights — Red, Yellow and Green. Built using an Arduino Uno, three LEDs and resistors on a breadboard, the lights cycle automatically in sequence: Green for cars to go, Yellow to warn of stopping, then Red to halt traffic. It is the simplest and most fundamental traffic light project, establishing the core concepts of digital output control, sequential timing and the use of delay() functions in Arduino code. Everything in the next projects builds directly on what is learned here.