Ultrasonic Obstacle-Avoidance Robot Car Kit – 4WD Smart Vehicle with IR & Ultrasonic Sensors, PWM Motor Control | Arduino-Compatible STEM Platform | Supports C/Scratch/Mixly | Expandable with Bluetooth/Wi-Fi | Safe 6–9V DC Power | DIY Robotics Learning

The Advanced Smart Robot Car Kit combines ultrasonic obstacle avoidance, infrared line tracking, and Bluetooth wireless control into one fully programmable educational platform. It’s engineered for comprehensive STEM learning — integrating electronics, mechanics, and programming through practical experimentation.

Built upon a four-wheel-drive acrylic chassis, the robot utilizes a combination of sensors to perceive its surroundings and make autonomous decisions. The ultrasonic module measures distance in real time to prevent collisions, while dual infrared sensors on the bottom track the contrast between black and white surfaces, enabling precise line following. Together, they provide an excellent introduction to sensor fusion and autonomous navigation systems.

The control unit is Arduino-compatible, allowing programming in C, Scratch, or Mixly. With preloaded example projects, students can build, test, and modify functions such as obstacle detection, path correction, servo steering, and speed control. Bluetooth support allows wireless communication via smartphone or tablet apps, transforming manual driving into a coding-controlled experience.

The robot operates safely between 6–9 volts, supported by built-in protection against reverse polarity, overcurrent, and noise interference. Capacitors and regulators maintain stable voltage levels during high-load operation. The modular design requires no soldering—all components connect via clearly labeled ports for quick setup.

Educationally, the kit introduces key concepts in robotics: signal processing, analog/digital input, PWM-based motor control, and feedback loops. It’s suitable for both beginner and advanced courses, helping students build real-world programming logic and mechanical understanding.

The included 16-lesson curriculum progresses from basic control to complex automation:

Introduction to robotics hardware

Understanding sensor signals

Building the chassis and wiring modules

Writing the first motor control program

Ultrasonic distance measurement

Infrared line following

Combining tracking and avoidance

Adjusting servo steering

Integrating Bluetooth control

Remote smartphone driving

Real-time debugging via serial monitor

Speed calibration and PWM fine-tuning

Autonomous mode integration

Multi-sensor response optimization

Algorithmic logic challenges

Final project: autonomous navigation challenge

This robot provides a bridge between theory and practical application. Students not only write code but also see physical results of their algorithms in motion. Teachers can demonstrate fundamental robotics principles, while learners gain confidence by completing tangible projects that evolve from manual control to full autonomy.

The kit’s durability and modularity make it perfect for repeated classroom use, workshops, and competitions. Its expandability ensures long-term educational value — supporting future upgrades in wireless communication, IoT applications, and AI-based control.

① Integrated Obstacle Avoidance and Line Tracking System
Combines ultrasonic and infrared sensing for seamless navigation. Enables the robot to detect obstacles, adjust paths, and follow lines simultaneously — a core demonstration of real-world autonomous vehicle logic.

② Bluetooth App and Wireless Coding Integration
Supports mobile app control and Bluetooth-based programming for wireless operation. Students can manually drive or automate control sequences, learning about serial data transmission and IoT connectivity.

③ Arduino-Compatible Multi-Language Coding Platform
Works with C, Scratch, and Mixly environments, providing scalable difficulty levels for beginners and advanced learners. Encourages exploration of conditions, loops, and control structures.

④ Safe and Modular Construction Design
Powered by 6–9V DC, featuring reverse-polarity protection and noise filtering. All modules connect through labeled plugs, ensuring safe assembly and easy maintenance. Transparent acrylic chassis ideal for classroom demonstration.

⑤ Complete STEM Learning Experience
Students gain interdisciplinary skills — electronics, mechanics, and programming — through structured learning and experimentation. Fosters teamwork, creativity, and logical reasoning while developing hands-on engineering expertise.