MG90S Micro Servo

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

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	Position	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.

Start wiring

PWM · 5

Confirm the data interface matches your host board.

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

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