Mini Servo Motor SG90 for Arduino RC Planes 9g 9 gram

Specifications:

• Operating Voltage: 4.8V – 6.0V DC
  
• Stall Torque: 1.6 kg-cm (at 4.8V)
  
• Operating Speed: 0.12 sec/60 degrees (at 4.8V)
  
• Rotation Angle: 180 Degrees (90° in each direction)
  
• Gear Material: Nylon (Industrial Strength Plastic)
• Weight: 9 grams
  
• Dead Band Width: 7 usec
  
• Dimensions: 22.2 x 11.8 x 31 mm
  
• Connector Type: Female JR/Futaba (Compatible with standard 2.54mm headers)

Applications:

• RC Aeromodelling: Perfect for controlling ailerons, elevators, and rudders on lightweight park flyers and foam board planes.
  
• Miniature Robotics: Essential for building hexapod walkers, robotic grippers, and pan-tilt camera mounts.
  
• IoT Switches: Low-cost solution for physically toggling light switches or pressing buttons in home automation projects.
  
• Animatronics: Great for eye movements and small facial features in props.

Project Evolution

• Prerequisites: If you have mastered digitalWrite(LED, HIGH), you are ready for this. This is the logical next step after learning to blink an LED.
  
• Feature Upgrade: This servo unlocks the ability to interact with the physical world. Instead of just displaying data, your project can now open a latch, steer a vehicle, or wave a flag.
  
• Effort Level: Beginner. Requires only 3 wires and the standard <Servo.h> library.
  
• Minimum Hardware: An Arduino Uno, ESP32 (3.3V safe), or any PWM source. Note: For heavy loads, use an external 5V power supply.

Virtual Technician: Wiring & Safety

Pin Mapping

• Brown / Black: Ground (GND)
  
• Red: VCC (4.8V - 6V)
  
• Orange / White: Signal (PWM Pin)
•  Warning: While the SG90 can run on 4.8V, do not power multiple servos directly from your Arduino's 5V pin. The current spike during startup can cause your microcontroller to reset (brownout). We highly recommend using a dedicated power supply or a Servo Driver Shield for stable operation.

Package Includes:

• 1 X SG90 Mini Servo Motor 9g - 180 Degree

Frequently Asked Questions (FAQ)

1. What is the maximum weight the SG90 servo can lift?
   It has a stall torque of 1.6kg-cm, meaning it can hold 1.6kg at a distance of 1cm from the shaft, or 160g at 10cm.
2. Can I control the SG90 with a Raspberry Pi?
   Yes, but the Raspberry Pi GPIO is 3.3V. While it often works, we recommend a level shifter or a dedicated PWM driver like the PCA9685 for stability.
3. Does this servo rotate 360 degrees?
   No, this is the standard 180-degree version. For continuous rotation, look for the SG90-360 variant.
4. Why is my servo vibrating or jittering?
   Jitter is usually caused by an unstable power supply. Try using an external battery pack instead of USB power.
5. Are the gears made of metal or plastic?
   The SG90 uses nylon (plastic) gears. For metal gears, check the MG90S model.
6. What library do I need for Arduino?
   Use the standard <Servo.h> library included in the Arduino IDE. No external downloads are required.
7. Is this servo waterproof?
   No, the SG90 is not waterproof. Water ingress will damage the internal potentiometer and circuit.
8. Can I use this for a 1/10 scale RC car steering?
   No, it is too weak for 1/10 scale cars. It is designed for 1/18 scale or smaller, and aircraft surfaces.
9. What is the PWM frequency for this motor?
   It expects a standard 50Hz PWM signal.
10. How do I center the servo before mounting?
    Run code to set the servo to 90 degrees (center) before attaching the horn to ensure equal travel in both directions.
11. What is the cable length?
    The integrated 3-wire cable is approximately 25cm long.
12. Can I drive this with a 9V battery?
    No! 9V will destroy the motor. The maximum safe voltage is 6V.
13. Does it come with mounting hardware?
    Yes, it includes a set of plastic horns (arms) and mounting screws.
14. Why is my servo getting hot?
    If the load is too heavy or the mechanism is jammed, the motor draws stall current and heats up. Remove power immediately.
15. What is the pulse width range?
    Typically 500µs (0°) to 2400µs (180°), though exact values can vary slightly by batch.
16. Can I use this with an ESP8266/NodeMCU?
    Yes, the signal pin works with 3.3V logic, but power (VCC) must come from a 5V source (USB/Vin).
17. Is this compatible with PCA9685 drivers?
    Yes, the PCA9685 is the ideal driver for controlling multiple SG90 servos simultaneously.
18. How accurate is the positioning?
    It has a dead band of ~7µs. It is accurate enough for basic robotics but not precision industrial tasks.