Arduino-Compatible Smart 4WD Robot Car Kit | STEM Educational Platform for Coding, Electronics & Robotics Learning | Ultrasonic Obstacle Avoidance + Infrared Line Tracking + Servo Steering + PWM Motor Control | Bluetooth/Wi-Fi Expandable DIY Kit

This Smart 4WD Robot Car Kit provides an immersive learning experience in STEM robotics, electronics, and programming, allowing students and makers to explore the core concepts of automation and control systems. The kit integrates ultrasonic obstacle avoidance and infrared line tracking functions, forming a complete and intelligent autonomous driving platform.

The car is built on a solid four-wheel-drive chassis equipped with four high-torque DC motors and anti-slip rubber tires, ensuring smooth and stable operation on various surfaces. It features an ultrasonic sensor mounted on a servo motor that dynamically scans the environment to measure distance and avoid obstacles in real time. At the front, three infrared tracking sensors detect line contrasts and edges, enabling precise navigation and path-following.

Powered by a safe 6–9V DC supply, the system includes built-in protection against reverse polarity and overcurrent. The L298N dual motor driver manages PWM speed and directional control, allowing learners to experiment with motion logic, sensor feedback, and electronic power regulation.

The Arduino-compatible mainboard supports multiple programming environments including Arduino IDE, Mixly, and Scratch, providing flexibility for learners at different levels. Beginners can use block-based visual coding, while advanced students can design logic-based algorithms and interactive control systems.

This educational robot platform helps students understand critical robotics principles such as PID control, feedback loops, sensor fusion, and path optimization. It promotes creativity through project-based learning and gives teachers a practical tool to demonstrate automation, motor control, and mechatronic integration.

The modular acrylic structure simplifies assembly — all modules use labeled sockets, eliminating soldering and ensuring easy maintenance. It’s ideal for classroom reusability and safe experimentation. The open-source nature of the platform allows users to expand the system with Bluetooth, Wi-Fi, and camera modules, introducing concepts of IoT and artificial intelligence in real applications.

With its combination of precision mechanics, robust electronics, and accessible programming, this robot car serves as an ideal bridge between theoretical learning and real-world technology, turning curiosity into hands-on engineering knowledg

Ultrasonic Obstacle Avoidance System
The robot’s ultrasonic sensor, mounted on a servo motor, rotates to detect obstacles from multiple directions. It measures distance by sending and receiving sound waves, automatically adjusting motion to avoid collisions. Students learn how sensors collect environmental data and how algorithms translate those readings into motor commands — a foundational concept in autonomous robotics and self-driving technology.

Infrared Line Tracking with Triple Sensor Array
Three infrared sensors provide more accurate line detection and navigation control than standard dual-sensor systems. This enhances stability in line-following applications and allows for advanced PID tuning. Students can observe real-time adjustments as the robot maintains precise alignment on curves and intersections, learning about control logic and calibration methods.

Arduino-Compatible Coding for All Levels
Compatible with Arduino IDE, Scratch, and Mixly, this kit empowers students to design custom programs using either graphical blocks or structured C language. Coding exercises include motion routines, sensor integration, and logic branching. The dual-layer learning structure encourages creativity while reinforcing logical problem-solving skills.

Safe Power and Modular Design
The 6–9V DC power system ensures classroom-safe operation with built-in current protection. The acrylic chassis features clearly labeled ports, making assembly quick and reliable. The modular setup supports continuous reconfiguration for different lessons, ensuring long-term usability and teaching flexibility.

Comprehensive STEM Educational Platform
Combining mechanics, electronics, and software, the kit builds essential skills in automation, mechatronics, and system design. It promotes teamwork, critical thinking, and technical literacy, preparing students for advanced STEM and robotics studies.