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).
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.
Ground reference, shared with ESP32 GND (brown or black wire).
PWM control signal, 50 Hz, 1–2 ms pulse width (orange or yellow wire). Connect to any ESP32 GPIO capable of PWM output.
| 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. |
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.
Ground reference, shared with ESP32 GND (brown or black wire).
PWM control signal, 50 Hz, 1–2 ms pulse width (orange or yellow wire). Connect to any ESP32 GPIO capable of PWM output.
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.
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