Arduino-Compatible 4WD Bluetooth Smart Robot Kit

This 4WD Smart Robot Car Kit is a complete Arduino-based educational robotics platform designed to teach mechanical engineering, electronics, and programming through real hands-on experimentation. Built with a UNO R3 compatible ATmega328P microcontroller, it integrates ultrasonic obstacle avoidance and infrared line tracking, allowing learners to explore autonomous navigation, sensor fusion, and control logic in a practical environment.

The system uses an ultrasonic distance sensor to detect obstacles in real time, enabling the robot to stop, turn, or reroute automatically. At the same time, dual infrared sensors detect surface contrast to follow predefined paths accurately. This dual-sensor architecture demonstrates how multiple inputs are processed by a microcontroller to generate intelligent motion decisions, forming the foundation of modern robotics systems.

The 4WD drive structure is powered by four DC gear motors controlled through an L298N dual H-bridge motor driver, delivering stable torque, smooth movement, and precise directional control. The transparent acrylic chassis allows clear visibility of wiring and structure, helping students understand both mechanical layout and circuit connections.

Programming is supported through the Arduino IDE, enabling users to upload code for PWM speed control, sensor data processing, and autonomous behavior logic. With open-source examples, learners can quickly build functions such as line tracking, obstacle avoidance, and Bluetooth expansion control. The system also supports serial monitoring, allowing real-time debugging and performance optimization.

Designed with a plug-and-play modular structure, all components connect without soldering, making it safe and easy for classroom use. The low-voltage 5V–9V power system includes protection features to ensure stable and secure operation during repeated experiments.

Ideal for STEM education, robotics training, engineering labs, and maker projects, this kit helps students develop core skills in embedded systems, automation, and intelligent robotics, bridging the gap between theory and real-world application.

Power Supply Note:
The kit requires 2 × 18650 3.7V batteries (not included), allowing users to select battery capacity according to their project needs. Instructions and learning resources are available via manual download link and QR code.