Smart Obstacle-Avoidance Robot Car Kit – 4WD Ultrasonic & Infrared Sensor Platform with PWM Motor Control | Arduino-Compatible | STEM Coding Learning | Supports C/Scratch/Mixly | Expandable with Bluetooth & Wi-Fi Modules

This Smart Ultrasonic Obstacle-Avoidance Robot Car Kit is an advanced yet beginner-friendly robotics platform that helps students explore the core principles of autonomous motion, sensor integration, and coding logic. Designed for schools, universities, and makerspaces, it provides a perfect foundation for learning electronics, programming, and mechatronics in a hands-on, project-based way.

Built with a four-wheel-drive (4WD) acrylic chassis, the car integrates ultrasonic distance sensing and dual infrared sensors to achieve intelligent obstacle detection and navigation. The ultrasonic module continuously measures distances and prevents collisions, while the infrared sensors enhance environmental awareness, ensuring smooth movement even in complex layouts.

The main control unit is Arduino-compatible, supporting programming in C language or visual environments like Scratch and Mixly. Students can easily load example programs to perform autonomous driving, obstacle detection, and avoidance routines, or modify parameters to experiment with responsiveness, range, and reaction time.

Powering the robot is a safe 6–9V system equipped with voltage stabilization and reverse-polarity protection. Capacitive filtering smooths power delivery, preventing noise interference and ensuring reliable operation. The kit can be powered via USB or standard battery holder, making it ideal for flexible classroom use.

The modular plug-and-play design eliminates the need for soldering, allowing quick assembly and easy maintenance. Each component connects through labeled ports on the motor driver board, ensuring error-free wiring. The four high-torque DC motors, rubber wheels, and dual-layer chassis provide excellent traction and mechanical stability.

This educational platform teaches practical applications of automation and robotics engineering through guided exercises. Students learn about signal acquisition, analog-to-digital conversion, control loops, and sensor-based decision making. The car can also be extended with Bluetooth or Wi-Fi modules, allowing remote control or multi-robot interaction.

The included curriculum package consists of detailed lessons and progressive experiments:

Understanding ultrasonic distance measurement

Wiring and testing the ultrasonic module

Setting up infrared obstacle sensors

Implementing automatic obstacle avoidance

Controlling motors via PWM

Adjusting servo angles for steering

Calibrating distance thresholds

Using serial monitor for debugging

Adding Bluetooth control features

Wireless programming through Wi-Fi

PID optimization for smoother motion

Building a custom autonomous navigation algorithm

Through experimentation, students develop logical reasoning, coding fluency, and system integration skills. Teachers can adapt lessons for beginners or advanced learners, making this kit suitable for secondary education, technical training, and robotics competitions.

The sturdy structure and safety-focused design allow repeated classroom use, providing reliable operation and low maintenance costs. Whether in a STEM lab, coding workshop, or university course, this kit bridges theory and real-world robotics, empowering students to turn imagination into intelligent motion.

① Ultrasonic Intelligent Obstacle-Avoidance System
Equipped with a high-precision ultrasonic module for real-time distance measurement and collision prevention. Combined with dual infrared sensors, it ensures 360° detection coverage and adaptive decision-making for smooth navigation in dynamic environments.

② Arduino-Compatible Programming Platform
Fully compatible with Arduino IDE, Mixly, and Scratch. Students can write code, modify parameters, and visually debug sensor responses. Ready-to-use project templates simplify teaching and allow students to focus on understanding algorithms.

③ Safe Power and Protection Circuit
Operates safely on 6–9 V DC. Built-in reverse-polarity, overcurrent, and voltage stabilization circuits ensure reliability. Filtering capacitors minimize noise from motors, extending hardware lifespan and improving control accuracy.

④ Modular Design for Quick Assembly
All components connect via labeled ports — no soldering required. The plug-and-play system reduces setup time and wiring errors, ideal for classroom and workshop use. The transparent acrylic chassis highlights component layout for educational demonstration.

⑤ Comprehensive STEM Learning Experience
Integrates mechanics, electronics, and coding. Students learn real-world engineering processes: sensing, decision making, control, and feedback. Encourages experimentation, problem solving, and creativity in robotics learning.

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