MG90S Micro Servo

Tower Pro MG90S 9 g metal-gear micro servo. Controlled via standard 50 Hz PWM (1–2 ms pulse width), 4.8–6 V. Stall torque 1.8 kg·cm at 4.8 V / 2.2 kg·cm at 6 V; 0°–180° rotation range. Three-wire interface: VCC (red), GND (brown/black), Signal (orange/yellow).

Logical pinout · physical placement not verified

VCC
Supply voltage 4.8 V – 6 V (red wire). Typically powered from an external 5 V rail, not directly from the ESP32 3.3 V pin.
Type · PowerVoltage · 5
GND
Ground reference, shared with ESP32 GND (brown or black wire).
Type · Ground
SIG
PWM control signal, 50 Hz, 1–2 ms pulse width (orange or yellow wire). Connect to any ESP32 GPIO capable of PWM output.
Type · PWM

Pin	Type	Function	Voltage
VCC	Power	Supply voltage 4.8 V – 6 V (red wire). Typically powered from an external 5 V rail, not directly from the ESP32 3.3 V pin.	5
GND	Ground	Ground reference, shared with ESP32 GND (brown or black wire).
SIG	PWM	PWM control signal, 50 Hz, 1–2 ms pulse width (orange or yellow wire). Connect to any ESP32 GPIO capable of PWM output.

Logical pinout · physical placement not verified

Pin details

3 connections

VCC
Supply voltage 4.8 V – 6 V (red wire). Typically powered from an external 5 V rail, not directly from the ESP32 3.3 V pin.
PowerVoltage · 5
GND
Ground reference, shared with ESP32 GND (brown or black wire).
Ground
SIG
PWM control signal, 50 Hz, 1–2 ms pulse width (orange or yellow wire). Connect to any ESP32 GPIO capable of PWM output.
PWM

Start wiring

PWM · UART · Wide input · Wired

Confirm the data interface matches your host board.

Module pins: VCC, GND, SIG. Schematik maps them to your board in the app.

Servos

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