MG90S Servo Motor 180° Micro All-Metal Gear

The MG90S 180° All-Metal Gear Micro Servo Motor is a compact, lightweight servo designed for precise angular positioning in robotics, electronics and automation projects. It combines a durable metal gear transmission with responsive position control, making it ideal for applications requiring accurate movement in limited spaces.

With its all-metal gear system, the MG90S provides improved mechanical strength and durability for robotic mechanisms, steering systems and moving assemblies. Its compact construction makes it particularly suitable for small robotic arms, grippers, RC vehicles, camera positioning systems and DIY automation projects.

The MG90S operates from a 4.8V–6V DC supply and delivers stall torque of 1.8 kg·cm at 4.8V and 2.2 kg·cm at 6V. Its 180° positional movement allows a microcontroller to control the output shaft at specific angular positions using standard servo control signals.

The servo features a three-wire interface, making it easy to control using an Arduino Uno R3 Board, ESP32 WROOM-32 Development Board or a compatible servo controller.

For students, robotics enthusiasts, electronics hobbyists and STEM facilitators in Ghana, the MG90S is an excellent component for learning servo motor control, automated movement and mechatronics.

Key Features

• All-Metal Gear System: Provides strength and durability for mechanical applications.
• 180° Positional Rotation: Enables controlled angular movement.
• High Torque: Delivers 1.8 kg·cm at 4.8V and 2.2 kg·cm at 6V stall torque.
• Compact Micro Servo: Suitable for space-constrained electronics and robotics projects.
• Fast Response: Operating speed of 0.10 sec/60° at 4.8V and 0.08 sec/60° at 6V.
• Standard PWM Servo Control: Compatible with Arduino, ESP32 and other servo-capable controllers.
• Metal Output Shaft: Provides a durable mechanical connection for servo attachments.
• Three-Wire Interface: Simple power, ground and signal connections.
• Lightweight Construction: Approximately 13.4g for compact robotic assemblies.
• Position Feedback: Internal control system maintains the commanded angular position.

Technical Specifications

How the MG90S Servo Motor Works

The MG90S is a positional servo that uses an internal motor, metal gearbox, position-feedback mechanism and control circuit to regulate the angle of its output shaft.

A microcontroller sends a servo control signal specifying the required position. The servo interprets this signal and rotates its shaft towards the commanded angle.

For example, an Arduino can instruct the MG90S to move between positions such as 0°, 90° and 180°, allowing it to control mechanical linkages, robotic grippers and steering mechanisms.

The internal feedback system helps the servo maintain its commanded position against external forces within its torque capability.

MG90S Servo Motor Pin Connections

The MG90S features three connection wires:

• Brown – GND: Connect to power supply ground.
• Red – VCC: Connect to a regulated 4.8V–6V DC supply.
• Orange – Signal: Connect to a suitable microcontroller GPIO output for servo position control.

For Arduino projects, the servo can be controlled using the Arduino Servo library.

For wireless automation and IoT projects, the ESP32 WROOM-32 Development Board can generate the servo control signal.

Use a separate regulated 5V supply with sufficient current for the servo, and connect its ground to the microcontroller ground. This helps prevent power disturbances during motor startup and movement.

Applications of the MG90S Micro Servo Motor

1. Robotic Arms and Grippers

Control lightweight robotic joints, grippers and mechanical linkages requiring accurate angular positioning.

2. Arduino and ESP32 Robotics

Build programmable moving mechanisms using microcontrollers, sensors and servo control libraries.

3. RC Cars, Aircraft and Models

Operate steering linkages, control surfaces and small mechanical assemblies in remote-controlled models.

4. Camera Pan-and-Tilt Systems

Position small cameras or sensors horizontally and vertically using servo-driven mounting mechanisms.

5. Automatic Opening Mechanisms

Develop lightweight automatic lids, latches, miniature gates and other controlled mechanical systems.

6. STEM and Engineering Projects

Demonstrate pulse-width control, angular displacement, feedback systems, robotics and mechatronics during practical lessons.

7. IoT Automation Projects

Combine the servo with an ESP32 to develop remotely controlled mechanical systems and smart-device prototypes.

MG90S vs SG90 Servo Motor

The MG90S and SG90 are compact positional servo motors suitable for electronics and robotics projects.

The MG90S features an all-metal gear transmission, providing greater mechanical strength for applications involving repeated movement and mechanical loading.

The SG90 9g Micro Servo Motor uses nylon gears and is suited to lighter mechanisms and basic servo control experiments.

For projects requiring a compact servo with metal gears, the MG90S is a practical choice.

Compatible Components and Accessories

The MG90S can be integrated with several electronics products available from DIYGH.

Use the Arduino Uno R3 Board with USB Cable to build a basic servo positioning system, sensor-controlled mechanism or robotic arm.

For Wi-Fi-based automation, the ESP32 WROOM-32 Development Board provides programmable control and wireless connectivity.

If you are beginning with electronics and servo motor programming, the Arduino Uno R3 Starter Kit includes components for learning microcontroller programming, circuit prototyping and motor control.

For heavier mechanical applications requiring substantially greater torque, DIYGH also stocks the MG996R 360° Continuous Rotation Metal Gear Servo Motor, designed for continuous rotational movement rather than positional angle control.

Why Buy the MG90S Servo Motor from DIYGH?

At DIYGH Tech Hub, we supply servo motors, Arduino boards, robotics components, sensors and electronics accessories for engineering students, STEM educators, technicians and DIY enthusiasts.

Whether you are building a robotic arm, developing an automatic control mechanism or learning microcontroller programming, DIYGH provides the essential components for your projects.

Shop online at DIYGH Tech Hub or visit our physical store at Apatrapa Junction, Kumasi, Ghana.

Important Usage Instructions

• Power the motor using a regulated 4.8V–6V DC supply.
• Connect the servo ground and microcontroller ground together.
• Do not power the servo directly from a microcontroller GPIO pin.
• Avoid forcing the output shaft beyond its 180° mechanical travel.
• Do not hold the servo against a mechanical obstruction for extended periods.
• Use the Arduino Servo library or a compatible servo control library.
• The MG90S 180° is intended for angular positioning, not continuous rotation.

Package Contents

1 × MG90S 180° All-Metal Gear Micro Servo Motor

Learning Resource

Learn how to control servo motor position with Arduino using the Adafruit Arduino Servo Motor Tutorial.