Servo
SG90 Micro Servo Motor
The classic 9g micro servo — small, cheap, and perfect for any hobby mechanism.
The most common hobby servo in existence — 180° rotation, 9g weight, and near-universal library support across every microcontroller platform.
Specifications
| Operating voltage | 4.8V - 6V DC (5V typical) |
| Torque | ~1.8 kg·cm at 4.8V, ~2.2 kg·cm at 6V |
| Rotation | ~180° on most units (some batches are limited to 120° — test before mounting) |
| Speed | ~0.1 sec/60° at 4.8V, no-load |
| Control signal | PWM, 50Hz, ~1ms-2ms pulse width (1.5ms = center) |
| Weight | ~9g |
Pinout
| Pin | Name | Description |
|---|---|---|
| 1 | GND | Ground — usually the brown or black wire |
| 2 | VCC | Power, 4.8V-6V DC — usually the red wire |
| 3 | Signal | PWM control input — usually the orange or yellow wire |
Wire color order (GND-VCC-Signal vs Signal-VCC-GND) varies by manufacturer — check the connector keying, not just color, before powering on.