{"id":50384429,"url":"https://github.com/debanshu2005/bluetooth_rc_car","last_synced_at":"2026-05-30T14:01:24.365Z","repository":{"id":321639629,"uuid":"1086495569","full_name":"Debanshu2005/Bluetooth_RC_CAR","owner":"Debanshu2005","description":"This repository consists of the code and the components needed to make a simple Bluetooth controlled car using an 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🚗 Bluetooth Controlled RC Car (ESP32 + BTS7960)\n\nThis project is a **Bluetooth-controlled RC car** built using an **ESP32 microcontroller** and **BTS7960 motor drivers**.  \nThe car is designed for smooth remote operation via a smartphone app and uses high-torque **500 RPM geared DC motors** mounted on a **metal chassis**.\n\n---\n## Photos \n![WhatsApp Image 2025-10-30 at 19 48 27_f43ebac4](https://github.com/user-attachments/assets/977d4e9b-2626-4008-b156-e8ff0af17f5d)\n---\n\n\n## 🧩 Components Used\n\n| Component | Quantity | Description |\n|------------|-----------|-------------|\n| **ESP32** | 1 | Main microcontroller used for Bluetooth communication and motor control |\n| **ESP32 Expansion Board** | 1 | Simplifies wiring and power connection |\n| **BTS7960 Motor Driver** | 2 | Dual-channel high-current motor drivers used to control 4 DC motors (2 per driver) |\n| **500 RPM Geared DC Motor** | 4 | Provides sufficient torque and speed for the car’s movement |\n| **Metal Chassis** | 1 | Sturdy base for mounting motors, drivers, and controller |\n| **Wheels** | 4 | Attached to DC motors for locomotion |\n| **Connecting Wires** | — | For all electrical connections |\n| **9V Battery** | 1 | Powers the ESP32 and drivers  |\n| **2200 mAH LiPo battery** | 1 | Powers the motors  |\n\n\n---\n\n## ⚙️ Working Principle\n\n1. **Bluetooth Control:**  \n   The ESP32 connects to a smartphone via Bluetooth. A mobile app (such as *Arduino Bluetooth controller* from the Play Store) sends commands like **Forward**, **Backward**, **Left**, **Right**, and **Stop**.\n\n2. **Signal Processing:**  \n   The ESP32 receives these commands through its Bluetooth serial interface and decodes them in real-time.\n\n3. **Motor Driving:**  \n   - Two **BTS7960 drivers** handle the 4 motors (2 per driver).  \n   - Each driver receives PWM signals from the ESP32 to control the direction and speed of the motors.\n\n4. **Movement:**  \n   - **Forward:** All motors rotate forward.  \n   - **Backward:** All motors rotate backward.  \n   - **Left / Right:** One side slows down or reverses to turn.  \n   - **Stop:** PWM signals are set to 0.\n\n---\n\n## 🔌 Circuit Overview\n\n**ESP32 Connections:**\n- Each BTS7960 is connected to separate PWM and enable pins from the ESP32.\n- logic power (5V) are derived from the expansion board.\n- The 9V battery powers both motor drivers and ESP32 via the barrel jack of the expansion board.\n\n**Basic Wiring Flow:**\n- ESP32 → BTS7960 #1 → [Front Left + Front Right Motors]\n- ESP32 → BTS7960 #2 → [Rear Left + Rear Right Motors]\n- Battery → ESP32 Expansion Board (barrel jack)\n- LiPo → BTS7960 #1and BTS7960 #2 (To power the motors)\n  \n  ---\n  \n---\n\n## 📱 Mobile App Control\n\nYou can use any **Bluetooth Controller App**\n\n**Typical Control Buttons:**\n- 🔼 Forward  \n- 🔽 Backward  \n- ◀️ Left  \n- ▶️ Right  \n    \n\nPair the ESP32 via Bluetooth (device name will appear as *ESP32_BT* or similar) and start controlling your car.\n\n---\n\n## ⚡ Power Supply Notes\n\n- The **9V battery**  powers the ESP32.\n- The **2200 mAH LiPo** powers the motors\n\n\n\n---\n\n## 📸 Assembly Overview\n\n1. Mount 4 geared DC motors onto the **metal chassis**.  \n2. Attach **wheels** to the motor shafts.  \n3. Secure **ESP32** (with expansion board) and both **BTS7960 drivers** on top of the chassis.  \n4. Connect wires according to the wiring diagram.  \n5. Power the system via the battery and connect through Bluetooth.\n\n---\n\n## 🧰 Tools Used\n\n- Soldering iron and wires  \n- Screwdriver and nuts/bolts  \n- Multimeter (for connection checks)  \n\n---\n\n## 👨‍💻 Authors\n\n**Debanshu Sarkar**, **Sriparno Roy**, **Kaushani Das**, **Somoshree Halder**\n\nB.Tech Student, Techno Main Saltlake  \n*Project: Bluetooth Controlled RC Car using ESP32 and BTS7960 Motor Drivers*\n\n---\n\n## 📄 License\n\nThis project is open-source and free to modify or distribute for educational purposes.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdebanshu2005%2Fbluetooth_rc_car","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdebanshu2005%2Fbluetooth_rc_car","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdebanshu2005%2Fbluetooth_rc_car/lists"}