Arduino Projects Ideas - Traffic Light Controller

 Arduino Projects Ideas - Traffic Light Controller

Components:
3 LEDs (Red, Yellow, Green)
3× 220Ω resistors
Arduino UNO
Jumper wires

Wiring:
Red LED → Pin 8
Yellow LED → Pin 9
Green LED → Pin 10(All LEDs connected via 220Ω resistors to GND)

Code:

void setup() {
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
}
void loop() {
  digitalWrite(8, HIGH); delay(3000); // Red
  digitalWrite(8, LOW);
  digitalWrite(9, HIGH); delay(1000); // Yellow
  digitalWrite(9, LOW);
  digitalWrite(10, HIGH); delay(3000); // Green
  digitalWrite(10, LOW);
}