🚦 Arduino Traffic Light System

This project simulates a traffic light using an Arduino UNO and three LEDs: Red, Yellow, and Green.
Each LED turns ON for a specific amount of time to represent a real traffic signal.

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⏱ Timing Sequence

Light	Duration
🔴 Red	30 seconds
🟢 Green	15 seconds
🟡 Yellow	5 seconds

The cycle repeats continuously.

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🔧 Hardware Required

• Arduino UNO
• Breadboard
• Red LED
• Yellow LED
• Green LED
• 3 × 220Ω resistors
• Jumper wires

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🔌 Pin Connections

LED	Arduino Pin	Resistor	Ground
Red	D2	220Ω	GND
Yellow	D3	220Ω	GND
Green	D4	220Ω	GND

Note:

• Long leg (anode) → Arduino pin
• Short leg (cathode) → resistor → GND

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▶️ How to Run

Using Arduino IDE

1. Open your Arduino project file (.ino)
2. Connect your Arduino UNO
3. Upload the code
4. Build the circuit as shown above

Using Wokwi Online

1. Create a new Arduino Uno project
2. Paste your Arduino code into sketch.ino
3. Add LEDs and resistors
4. Start the simulation

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🎯 Purpose

This project is ideal for beginners learning:

• Arduino digital output
• LED control
• Timing and delays
• Basic traffic signal logic