How to Use MG90S: Examples, Pinouts, and Specs

The MG90S servo motor is a compact and efficient micro servo often utilized in the field of remote-controlled (RC) models, robotics, and various DIY projects. It is prized for its ability to provide precise control of angular position, speed, and acceleration. The MG90S is known for its high performance relative to its cost, making it a popular choice for hobbyists and educators alike.

• Radio-controlled vehicles (cars, airplanes, boats)
• Robotic arms and manipulators
• Automated doors and windows
• Camera pan/tilt systems
• Educational projects and demonstrations

• Voltage: 4.8V to 6.0V
• Stall Torque: 2.0 kg-cm (4.8V), 2.2 kg-cm (6.0V)
• Operating Speed: 0.10 sec/60° (4.8V), 0.08 sec/60° (6.0V)
• Temperature Range: -30°C to +60°C
• Weight: 13.4g
• Dimensions: 22.8 x 12.2 x 28.5 mm

1. Power Supply: Connect the red wire to a power supply within the specified voltage range (4.8V to 6.0V). Ensure that the power supply can deliver sufficient current for the servo's operation.
2. Ground Connection: Attach the brown wire to the ground of your power supply and the ground of your control board to ensure a common reference point.
3. Control Signal: Connect the orange wire to a PWM-capable pin on your control board (e.g., an Arduino UNO).

• Avoid stalling the servo motor for extended periods, as this can lead to overheating and damage.
• Ensure that the mechanical load does not exceed the servo's stall torque rating.
• Use a servo driver or shield when controlling multiple servos to prevent excessive current draw from the control board.
• Implement proper gear alignment to prevent unnecessary strain on the servo's internal gears.

#include <Servo.h>

Servo myservo;  // Create servo object to control the MG90S

void setup() {
  myservo.attach(9);  // Attaches the servo on pin 9 to the servo object
}

void loop() {
  myservo.write(90);  // Set servo to mid-point (90 degrees)
  delay(1000);        // Wait for 1 second
  myservo.write(0);   // Move servo to 0 degrees
  delay(1000);        // Wait for 1 second
  myservo.write(180); // Move servo to 180 degrees
  delay(1000);        // Wait for 1 second
}

• Servo not responding: Ensure that all connections are secure and the power supply is within the specified voltage range.
• Erratic movement: Check for any signal interference or inconsistencies in the control signal.
• Overheating: Reduce the load or duty cycle if the servo motor becomes too hot to touch.

• Double-check wiring, especially the orientation of the control signal wire.
• Use an external power supply for the servo if the Arduino UNO cannot provide sufficient current.
• Implement a "sweep" test code to ensure the servo is functioning correctly across its range of motion.

Q: Can I control the MG90S servo with a Raspberry Pi? A: Yes, but you will need to ensure proper logic level conversion and use a library that supports PWM output.

Q: How can I increase the lifespan of my MG90S servo? A: Avoid excessive loads, operate within the recommended voltage range, and ensure proper alignment of connected components.