Smart Ultrasonic Obstacle-Avoidance & Line-Tracking 4WD Robot Kit | Arduino-Compatible STEM Coding Platform with Servo Steering, Dual IR Sensors, Ultrasonic Module, PWM Motor, Bluetooth/Wi-Fi Expansion | Educational Robotics Kit for Competitions

The Smart Ultrasonic Obstacle-Avoidance and Line-Tracking Robot Car Kit is a highly versatile educational robotics platform designed to teach students the core principles of autonomous navigation, motion control, and coding logic through hands-on experimentation. Built on a durable four-wheel-drive acrylic chassis, the system integrates multiple sensors, a servo steering mechanism, and an Arduino-compatible controller to simulate intelligent robotic behavior.

The car combines ultrasonic distance sensing and infrared line detection to navigate smoothly and avoid obstacles in real time. The ultrasonic module measures distances and prevents collisions, while the dual infrared sensors detect black and white contrasts for line tracking. The servo-mounted ultrasonic module provides dynamic scanning capabilities, mimicking radar-like detection patterns used in autonomous systems.

Powered by a 6–9V DC supply, the robot includes built-in safety features such as reverse polarity and overcurrent protection. Capacitive filters ensure stable voltage even under heavy motor load, providing consistent operation. Its plug-and-play modular design allows students to assemble or reconfigure components without soldering — ideal for repeated use in classrooms or workshops.

The control unit supports Arduino IDE, Scratch, and Mixly, making it adaptable for both beginners and advanced learners. Example codes guide students through exercises on motor PWM control, servo angle adjustment, ultrasonic distance calculation, and line-following algorithms. Teachers can extend lessons into advanced topics like PID control, real-time debugging, and multi-sensor data fusion.

The included curriculum package covers practical lessons that combine mechanical design, electronics, and programming:

Introduction to sensors and control logic

Building and wiring the 4WD chassis

Using ultrasonic distance sensors for obstacle detection

Implementing line tracking with infrared sensors

Integrating servo motion for dynamic scanning

Understanding PWM motor speed regulation

Combining tracking and obstacle avoidance functions

Debugging with serial monitor and data output

Bluetooth-based remote control programming

Wi-Fi module setup for IoT integration

Optimizing pathfinding with PID principles

Final project: autonomous robot challenge

This platform helps students connect theory with real-world robotics applications, understanding how hardware, software, and sensors work together to achieve autonomous movement. It encourages project-based learning, critical thinking, and creativity.

The robot’s transparent acrylic frame highlights internal wiring and circuit connections for educational demonstration. Its modular expandability allows the addition of extra sensors or wireless modules for advanced IoT or AI-related experiments. Perfect for competitions, STEM classes, or makerspaces, this kit represents the next step in hands-on robotics education.

① Dual Intelligent Navigation System
Integrates ultrasonic distance sensing for obstacle avoidance and infrared sensors for precise line tracking. The servo-mounted sensor provides a scanning motion that improves detection accuracy and situational awareness.

② Multi-Language Programming Compatibility
Compatible with Arduino IDE, Scratch, and Mixly environments, allowing students to code using text-based or visual blocks. Progressive lesson plans move from basic motor control to complete autonomous logic.

③ Safe Power and Stability Design
Operates on 6–9V DC with protective circuits to prevent overload, short circuit, or polarity reversal. The stabilized voltage output ensures consistent operation across all sensors and motors.

④ Modular and Transparent Construction
All components connect via labeled ports without soldering, simplifying setup. The transparent acrylic chassis helps visualize wiring paths and mechanical movement, ideal for teaching demonstrations.

⑤ Comprehensive STEM Education Value
Combines mechanics, electronics, and programming into a unified project. Encourages experimentation, algorithm development, and teamwork. Supports both beginner-level exploration and advanced engineering challenges.

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