2. INTRODUCTION
• Traffic lights are essential for regulating vehicle movement and ensuring road
safety. This project demonstrates a simple traffic light control system using an
Arduino Uno board, LEDs, and Tinkercad simulation. It mimics the real-world
operation of traffic signals through sequential lighting.
3. OBJECTIVE
• - To simulate a traffic control system using Arduino and LEDs.
• - To understand circuit building and microcontroller programming.
• - To demonstrate the sequencing logic of red, yellow, and green lights.
4. SIMULATION STEPS
• 1. Open Tinkercad and go to Circuits.
• 2. Build the circuit using LEDs, resistors, and Arduino.
• 3. Paste the Arduino code into the code editor.
• 4. Click 'Start Simulation' to test.
• 5. Observe the LEDs blinking in the correct sequence.
6. ️
🛠️CONNECTIONS:
LED COLOR ARDUINO PIN RESISTOR CONNECT TO
RED PIN 13 220Ω GND
YELLOW PIN 12 220Ω GND
GREEN PIN 11 220Ω GND
EACH LED’S LONG LEG (ANODE) GOES TO THE ARDUINO
DIGITAL PIN.
EACH SHORT LEG (CATHODE) CONNECTS TO ONE SIDE OF
A 220 RESISTOR, AND THE OTHER SIDE GOES TO GND.
Ω
7. CIRCUIT DIAGRAM
• Insert a screenshot of the Tinkercad circuit here.
• The circuit is built on a breadboard where each LED is connected to an
Arduino pin via a resistor.
9. CIRCUIT EXPLANATION
• - Red LED Pin 13
→
• - Yellow LED Pin 12
→
• - Green LED Pin 11
→
• - Each LED uses a resistor to avoid damage
• - All components share a common GND
11. REAL-WORLD APPLICATIONS
• - Used at road intersections to control vehicle flow.
• - Helpful in reducing traffic congestion.
• - Can be expanded to include pedestrian signals.
• - Used in smart traffic systems with sensors and AI.
12. CHALLENGES & SOLUTIONS
• **Challenges Faced:**
• - LED not lighting up due to wrong connections.
• - Delay timing needed adjustments.
• - Understanding pin mapping.
• **Solutions:**
• - Rechecked all wiring in Tinkercad.
• - Adjusted delay values for better timing.
• - Used Arduino documentation for clarity.
13. CONCLUSION
• This project helped me understand the basics of circuit design and Arduino
programming. It demonstrated how traffic lights function in real life. Tinkercad
made it easy to test and simulate the system without any hardware. I learned
practical applications of technology in everyday life.
