The MG90S Metal Gear Micro Servo Motor (TowerPro) is a compact 9-gram micro servo built for strength and precision. Unlike cheaper plastic-gear servos, the MG90S uses high-quality metal gears for extra strength and durability, making it the ideal upgrade for Arduino and robotics projects that demand more torque and a longer service life.

Key Features

• Metal gears for extra strength and durability compared with plastic-gear servos
• Compact and lightweight – only 9 grams
• High torque and precision positioning
• Wide operating voltage: 4.8V–6V DC
• Easy to use with Arduino, ESP32 and Raspberry Pi – standard 3-pin connector

MG90S Specifications

• Operating voltage: 4.8V–6V DC
• Torque: 1.8 kg-cm at 4.8V, 2.2 kg-cm at 6V
• Speed: 0.10 sec/60° at 4.8V, 0.08 sec/60° at 6V
• Weight: 9 grams
• Gear type: metal
• Rotation angle: 0°–180° (approx.)
• Connector: 3-pin – Brown: GND, Red: +5V, Orange: Signal
• Dimensions: approx. 22.5 x 12 mm; 24 mm body height; 29 mm total height
• Package includes: servo horns and mounting screws

Wiring the MG90S

The MG90S comes with a standard 3-pin servo connector:

• Brown wire → GND
• Red wire → 5V
• Orange wire → Arduino PWM pin (e.g. D9)

Connect it to your Arduino UNO R3 using jumper wires – brown to GND, red to 5V, and orange to a PWM-capable digital pin.

Arduino Code Example

This sketch uses the Arduino Servo library to sweep the servo between 0 and 180 degrees. Connect the orange signal wire to pin 9.

#include <Servo.h>

Servo myServo;

void setup() {
  myServo.attach(9);  // signal wire on Arduino pin D9
}

void loop() {
  for (int angle = 0; angle <= 180; angle += 1) {
    myServo.write(angle);
    delay(15);
  }
  for (int angle = 180; angle >= 0; angle -= 1) {
    myServo.write(angle);
    delay(15);
  }
}

Applications

• Robotic arms
• Robotic cars
• RC airplanes
• Pan-tilt camera mounts
• DIY projects

Related products: looking for the plastic-gear version? See the SG90 9G micro servo motor. Pair the MG90S with an Arduino UNO R3 and jumper wires to start building straight away.

Frequently Asked Questions

What is the difference between the MG90S and the SG90?

Both are 9g micro servos with the same size and 3-pin layout, but the MG90S has metal gears while the SG90 uses plastic gears. The metal gears give the MG90S extra strength and durability, making it the better choice for load-bearing projects such as robotic arms. The SG90 remains a good low-cost option for light-duty projects.

What voltage does the MG90S need?

The MG90S runs on 4.8V–6V DC. At 6V it delivers its full 2.2 kg-cm of torque with a faster 0.08 sec/60° response.

How much torque does the MG90S produce?

It produces 1.8 kg-cm at 4.8V and 2.2 kg-cm at 6V.

How do I connect the MG90S to an Arduino?

Connect the brown wire to GND, the red wire to 5V, and the orange wire to a PWM digital pin such as D9, then drive it with the Arduino Servo library as shown in the code example above.

What is included in the package?

The package includes the MG90S servo motor, servo horns and mounting screws.

Can the MG90S be used with an ESP32?

Yes – the MG90S is easy to use with the ESP32 as well as Arduino and Raspberry Pi. Simply connect the orange signal wire to a PWM-capable pin on your board.

Order the MG90S Metal Gear Micro Servo Motor from QKZEE Technologies, Lahore – fast delivery across Pakistan.