4WD Smart Robot Learning Kit | Infrared Line Tracking + Ultrasonic Obstacle Avoidance | Supports Arduino C Scratch Mixly Coding | Perfect for STEM Classrooms, Maker Labs & Science Fairs

The Smart 4WD Line-Tracking and Ultrasonic Obstacle-Avoidance Car Kit provides a complete hands-on experience for learning autonomous navigation, robotics, and embedded programming. Designed for educational environments, this platform combines mechanical design, sensor technology, and software control in a single integrated system.

Built on a sturdy acrylic four-wheel chassis, the car uses dual DC motors with gear reduction and rubber wheels for stability on smooth or textured surfaces. A servo-mounted ultrasonic sensor continuously scans the environment, measuring distances and dynamically adjusting the vehicle’s path to avoid obstacles. Infrared line sensors detect track boundaries and control direction with real-time feedback.

Students begin by assembling modular components — motor driver board, ultrasonic module, IR sensors, controller, and battery holder — using plug-in connectors that eliminate the need for soldering. This modular system supports quick disassembly and reconfiguration for multiple classroom sessions.

The main control board is Arduino-compatible (UNO or Nano), allowing students to program using C, Scratch, or Mixly. The code samples provided include modules for line tracking, ultrasonic ranging, servo scanning, and PWM speed regulation. As students adjust thresholds, timing, and sensor parameters, they gain direct insight into how feedback systems respond dynamically in real time.

The vehicle operates safely at 6–9 V using dual battery packs or regulated DC supply. Built-in power filtering and current protection ensure stable voltage output, preventing controller resets even under heavy motor load. The platform’s open architecture allows integration of additional modules such as Bluetooth, Wi-Fi, or IR remote control for wireless communication and extended experiments.

Educationally, this kit introduces principles of electronics, mechanics, and algorithmic logic. Students learn about sensor fusion, PWM control, servo positioning, and autonomous decision-making. Instructors can build progressive lessons, from simple manual control to fully autonomous driving routines that combine multiple sensor inputs.

The accompanying learning guide includes more than 15 step-by-step projects:

Understanding ultrasonic distance measurement

Basics of infrared line tracking

PWM motor control and speed calibration

Conditional programming for obstacle detection

Servo scanning and direction logic

Integrated line tracking and avoidance

Bluetooth remote control via smartphone

Wireless communication setup (Wi-Fi module)

Calibration and tuning techniques

Data logging and serial monitoring

PID speed regulation

Multi-robot communication

Maze-solving algorithms

Project-based learning challenges

Final creative prototype competition

By bridging mechanical and digital systems, this kit empowers students to apply physics, computer science, and mathematics in one tangible learning experience. It develops critical 21st-century skills — problem-solving, analytical reasoning, and design thinking.

The car’s robust design and reusable structure make it ideal for school laboratories, STEM programs, and maker workshops. Whether used for competitions or practical training, it transforms abstract concepts of automation into exciting, real-world experimentation.

① Dual-System Autonomous Navigation
Integrates infrared line-tracking and ultrasonic distance sensing to achieve fully autonomous navigation. The robot identifies obstacles, calculates direction, and adjusts course using sensor feedback. Ideal for demonstrating AI principles in classroom robotics.

② Expandable Coding Environment
Supports Arduino IDE for C-based programming and Scratch/Mixly for visual learners. Ready-to-use sample codes teach logic, loops, and sensor data processing. Teachers can easily extend exercises to wireless control, PID optimization, or multi-vehicle coordination.

③ Safe Power and Mechanical Durability
Operates between 6–9 V with onboard voltage regulation and overload protection. Four-wheel design ensures better traction and torque for complex surfaces. All structural plates are precision laser-cut acrylic for strength and classroom reuse.

④ Modular Structure and Quick Assembly
Plug-and-play components eliminate soldering. Each module connects via labeled ports for error-free wiring. Ideal for repeated classroom assembly and maintenance, reducing downtime and hardware waste.

⑤ Comprehensive STEM Educational Value
Combines principles from mechanical engineering, electronics, and programming into a single interactive kit. Encourages experimentation in sensor fusion, data-driven motion, and algorithmic control. Promotes creativity, teamwork, and scientific reasoning through project-based learning.

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