Servo Motor Micro SG90 9G

The TowerPro SG90 9G servo motor is a compact, lightweight, and cost-effective electromechanical component that translates electrical signals into accurate rotational movement. With a torque of approximately 1.5kg/cm and a speed of around 0.1s/60 degrees, it is ideal for RC planes, robotics, and other small-scale projects needing precise and responsive control. It operates within a voltage range of 4.8-6V and weighs just 9g.

Package Includes:

• 1 x TowerPro SG90 9G servo motor

Features:

• Compact and lightweight design

• Affordable and readily available

• High-quality and reliable construction

• Approximately 1.5kg/cm torque

• 0.1s/60 degrees speed

• 4.8-6V operating voltage range

• 9g weight

• Accurate and precise rotational control

• Versatile, widely used in robotics and RC planes

• Durable, suitable for frequent use

Description: The TowerPro SG90 9G is a popular micro-sized servo motor known for its small size, affordability, and dependable performance. It is commonly used in robotics, RC planes, and small projects requiring precise rotational control. With a torque rating of approximately 1.5kg/cm and a speed of 0.1s/60 degrees, it offers high accuracy and responsiveness. It operates between 4.8-6V and weighs just 9g, making it easy to integrate into various projects.

Principle of Work: The TowerPro SG90 operates using a small DC motor and a feedback control system. The motor connects to a series of gears that convert the motor's rotational motion into rotational output at the servo arm. The servo arm's position is controlled by an input signal, adjusting the current flow based on feedback from the potentiometer. This enables precise positioning of the servo arm. The servo motor rotates to a specific position upon receiving a PWM signal, holding that position until a new signal is received. By varying the pulse width of the PWM signal, the servo motor can be positioned anywhere between 0-180 degrees.

Pinout of the Module:

• Signal (Yellow): Input signal pin for controlling the servo motor's position via PWM.

• VCC (Red): Positive power supply pin, typically connected to +5V or another compatible voltage source.

• GND (Brown): Ground pin, typically connected to the power supply ground.

Applications:

• Robotics: Commonly used in hobbyist and educational robotics to control moving parts.

• RC Vehicles: Used in remote-controlled cars, planes, and boats for steering, control surfaces, and movable components.

• Small-Scale Projects: Ideal for model trains, animatronics, and other small electronic devices.

• Camera Gimbals: Used in stabilization systems for precise camera positioning.

• Medical Devices: Found in surgical robots and other medical equipment for tool movement.

• Industrial Automation: Applied in conveyor systems and assembly lines for precise control of mechanical parts.

Circuit:

• Connect the red wire (VCC) of the servo to the 5V pin on the Arduino board.

• Connect the brown wire (GND) to the GND pin on the Arduino board.

• Connect the white wire (Signal) to digital pin 5 on the Arduino board.

Library: The servo.h library is pre-installed in the Arduino IDE.

Code:

#include "Servo.h"
Servo myservo;

void setup() {
  myservo.attach(5); // Attach servo to pin 5
}

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

This code moves the servo to 0, 90, and 180 degrees with a one-second interval using the Servo library's write() function. You can adjust the pin number for the signal wire by changing the myservo.attach() value.

Technical Details:

• Operating Voltage: 4.8-6V (typically +5V)

• Torque: 2.5kg/cm

• Operating Speed: 0.1s/60°

• Gear Type: Plastic

• Rotation Range: 0°-180°

• Weight: 9g

• Dimensions: 22.8 x 12.2 x 28.5mm

• Dead Band Width: 10us

• Temperature Range: 0°C to 55°C

• Control System: PWM (Pulse Width Modulation)

• Connector Type: JR/Futaba compatible

Resources:

• Tutorial

Comparisons: The SG92R is another widely used micro servo, often compared to the SG90. Key differences include:

1. Torque: The SG92R offers a slightly higher torque (2.5 kg/cm) compared to the SG90’s 2.2 kg/cm, making it better suited for applications requiring more force.

2. Operating Voltage: The SG92R has a broader voltage range (4.8V-6.0V) compared to the SG90's typical 5V.

3. Gear Type: The SG92R has metal gears, offering improved durability over the SG90’s plastic gears.

4. Size: The SG92R is slightly smaller and lighter (9g) than the SG90 (14g), making it more suitable for compact applications.