N20 Micro-Gear Robot Chassis 4WD

Core Design & Mechanical Specs

The robot’s structure is built for durability and modularity. Key mechanical highlights include:

• N20 Micro-Gear Drivetrain: The 4-wheel system is powered by four N20 micro-gear motors. These motors offer significant torque in a tiny form factor, making the robot surprisingly powerful for its size.
• 3D-Printed Chassis: The body is fully 3D-printable. Because the Fusion 360 source files are included, you have complete creative freedom to modify the motor mounts, change the sensor housing, or add custom aesthetic panels.
• Ultrasonic Sensor Mount: A dedicated front-facing mount holds an HC-SR04 Ultrasonic Sensor, allowing the robot to "see" obstacles and calculate distances in real-time.

Modern Power System

Forget bulky battery packs or disposable cells. This robot features a streamlined, internal power management system:

• 18650 Battery Bay: The chassis includes a precision-molded internal mount for a standard 18650 Li-ion battery, providing long runtimes for your code.
• Type-C Charging: A built-in USB Type-C port is mounted directly to the frame. This allows for convenient charging without having to remove the battery or disassemble the robot, making it as user-friendly as a modern smartphone.

Electronics & Control Architecture

The electronics stack is designed for the widely-used Arduino Uno ecosystem, ensuring that beginners and experts alike can get started quickly.

• L293D Shield: The robot utilizes the L293D Motor Driver Shield, which mounts directly onto the Arduino Uno. This shield handles the high-current demands of the four motors while keeping wiring neat and organized.
• Controller Flexibility: While designed for the Uno, the open-source nature of the design makes it easy to swap in an ESP32 or NodeMCU if you require Wi-Fi control or more processing power.

Quick Technical Reference

Why Choose This Build?

This platform bridges the gap between a toy and a professional development kit. Whether you are teaching yourself robotics or building a fleet of autonomous rovers, the combination of 4WD power, Type-C charging, and CAD-ready files makes this a future-proof choice for your next project.

Design by Sumon on MakerWorld (license: BY-SA).