Servo Motor SG90 (180 Degree Rotation)

Overview — Compact SG90 Servo Motor for Arduino & Robotics

The SG90 Servo Motor is a compact, lightweight and reliable hobby servo that delivers precise 180° rotation. Commonly called the SG90 servo, it’s an ideal actuator for Arduino, Raspberry Pi and other microcontroller projects where space, weight and cost matter.

Why choose the SG90 Servo Motor?

• Compact size: Small footprint (23 x 12.2 x 29 mm) and only 9 g — fits tight assemblies and micro-robots.
• Accurate control: Smooth movement with small step resolution for precise positioning of linkages, camera pans, and control surfaces.
• Easy PWM control: Works directly with Arduino, Raspberry Pi (with appropriate PWM driver or library) and other boards using standard PWM signals.
• Wide compatibility: Operates at 4.8–6V so it runs from common battery packs, USB power (with regulator) or wall adapters.
• Cost effective: Low price makes it perfect for classroom kits, prototypes and mass deployment in hobby projects.

Key Features & Benefits

• Rotation: 180° — suitable for steering, pan/tilt and simple robotic joints.
• Torque: 1.8 kg·cm @ 4.8V; 2.2 kg·cm @ 6V — enough for small linkages and lightweight loads.
• Speed: 0.12 s/60° @ 4.8V; 0.10 s/60° @ 6V — responsive for typical hobby tasks.
• Mounting: Standard mounting holes and included horn options for quick installation.
• Connections: 3-wire lead (signal, Vcc, GND) with standard servo connector for easy hookup.

Technical Specifications

• Model: SG90
• Rotation: 180°
• Voltage: 4.8V – 6V
• Torque: 1.8 kg·cm (4.8V), 2.2 kg·cm (6V)
• Speed: 0.12 s/60° (4.8V), 0.10 s/60° (6V)
• Size: 23 x 12.2 x 29 mm
• Weight: 9 g

Applications & Project Ideas

The SG90 servo motor is versatile and widely used across many DIY and educational applications:

• Robots and robotic arms — joint actuation and simple grippers
• RC vehicles — steering mechanisms for small cars, boats, and planes
• Camera mounts and pan/tilt heads — smooth, repeatable camera movement
• Home automation — small valve or latch actuators
• School projects and prototypes — low-cost actuator for experiments

Quick Setup & Wiring Tips

1. Connect power (4.8–6V) to Vcc and GND. Use a separate power supply for multiple servos to avoid voltage drops.
2. Connect the servo signal wire to a PWM-capable GPIO pin on your board (Arduino servo library or PWM driver recommended).
3. Always test endpoints with your code before attaching linkages to avoid mechanical stress.
4. For Raspberry Pi, use a PWM controller (e.g., PCA9685) or software PWM library to ensure stable control.

Care & Best Practices

• Avoid stalling the servo under heavy loads — torque specs are for small/light applications.
• Use appropriate decoupling capacitors and common-ground wiring when combining microcontrollers and external power supplies.
• Store indoors or in a dry place; while sturdy, the SG90 is intended for hobby use rather than heavy industrial duty.

What’s in the Box

• 1 × SG90 Servo Motor (180°)
• Assorted servo horns and mounting screws

Note: Product images are for reference only. Actual product appearance may vary slightly.