Bluetooth Controlled Car using Arduino and HC-05

This project demonstrates how to build a Bluetooth-controlled robotic car using Arduino, L293D motor driver shield, and HC-05 Bluetooth module.

🧰 Components Used

• Arduino UNO
• L293D Motor Driver Shield
• 4 DC Motors
• HC-05 Bluetooth Module
• Android phone with BT Car App
• Power supply (4 x 1.5V batteries)

🔌 Circuit Connections

• L293D Shield is mounted directly on Arduino UNO.
• HC-05 Bluetooth Module connected to:
  • VCC → 5V
  • GND → GND
  • TX → Digital Pin 11
  • RX → Digital Pin 10 (via voltage divider)

📲 BT Car App Commands

• F – Forward
• B – Backward
• L – Left Turn (Long)
• R – Right Turn (Long)
• G – Left Turn (Short)
• I – Right Turn (Short)
• S – Stop

⏱ Motion Control

Each command moves the car for a fixed short duration (like 500 ms or 100 ms) and stops automatically.

💻 Arduino Code

The code is available in bt_car.ino.