How to Use Servomotor MG90S: Examples, Pinouts, and Specs

The MG90S is a compact and lightweight micro servo motor known for its precise angular movement capabilities. It is widely used in hobby projects, small robotic systems, and radio-controlled devices. The MG90S is favored for its durability, metal gears, and its ability to operate at higher speeds than many other servos in its class.

• Radio-controlled vehicles (cars, boats, planes)
• Robotic arms and grippers
• Camera pan/tilt systems
• Small-scale automation projects

• Voltage: 4.8V to 6.0V
• Stall Torque: 2.2 kg-cm (4.8V), 2.5 kg-cm (6.0V)
• Speed: 0.10 sec/60° (4.8V), 0.08 sec/60° (6.0V)
• Weight: 13.4g
• Dimensions: 22.8 x 12.2 x 28.5 mm

1. Power Supply: Connect the red wire to a power supply that is within the servo's voltage range (4.8V to 6.0V).
2. Ground: Connect the brown wire to the ground of your power supply and microcontroller.
3. Control Signal: Connect the orange wire to a PWM-capable pin on your microcontroller.

• Ensure that the power supply is stable and within the specified voltage range to prevent damage.
• Do not exceed the servo's torque capabilities as it may strip the gears.
• Use a separate power supply if the servo's current draw is too high for your microcontroller's voltage regulator.
• Always secure the servo motor to your project to prevent movement and vibration from affecting performance.

#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);  // sets the servo position to 90°
  delay(1000);        // waits for a second
  myservo.write(0);   // sets the servo to position 0°
  delay(1000);        // waits for a second
}

• Servo not responding: Ensure all connections are secure and the control signal is connected to a PWM-capable pin.
• Erratic movements: Check for a stable power supply and ensure the control signal is not noisy.
• Overheating: Avoid stalling the servo or overloading it beyond its torque capacity.

• If the servo is not moving, verify that the power supply voltage and current are sufficient.
• For jittery servo movements, try adding a capacitor (around 47µF to 100µF) across the power supply lines close to the servo.
• If the servo is overheating, reduce the load or duty cycle to allow it to cool down.

Q: Can I control the MG90S with a Raspberry Pi? A: Yes, but you will need to ensure proper PWM signal generation, which may require additional libraries or hardware.

Q: How many MG90S servos can I connect to an Arduino UNO? A: The UNO can control as many servos as there are PWM pins available, but power limitations may require an external power supply for multiple servos.

Q: What is the lifespan of the MG90S servo? A: The lifespan can vary based on usage, but with proper care and within its operating specifications, it can last for several years.