M5Stack 8-Channel Servo Driver Unit (STM32F030)

Resources:

INA199A1DCKR
Documents

8-Channel I2C Servo Driver Unit with STM32F030, Current Monitoring and Programmable Motor Power Control
The M5Stack U165 8-Channel Servo Driver Unit is designed to control up to 8 servo channels from an M5Stack host through I2C communication. It uses the STM32F030F4P6 microcontroller to generate multiple PWM signals for servo driving and operates at the default I2C address 0x25. The board is well-suited for robotics, multi-servo mechanisms, smart toys, and embedded motion-control projects requiring several servo outputs from a compact controller.
The unit integrates a main power MOS switch circuit that allows programmable motor power release and locking, along with an INA199A1DCKR current-monitoring circuit for collecting total current information. It supports 2 power-input options, including 9 V to 24 V and 5 V supplies, and provides reverse-power protection. The official specification lists a maximum combined servo load capacity of DC 5 V at 3 A across the 8 channels.
Key Features

8-Channel Servo Control: Drives up to 8 servo channels from a single compact control unit.
STM32F030 Controller: Uses the STM32F030F4P6 MCU to generate multiple PWM signals for servo operation.
I2C Communication: Connects to compatible M5Stack hosts through I2C at address 0x25.
Programmable Motor Power: Built-in MOS power-switching circuit supports software-controlled motor release and lock functions.
Current Monitoring: INA199A1DCKR current-sensing circuit provides total current collection for the servo system.
Dual Power Input: Supports 9 V to 24 V input or direct 5 V input depending on system configuration.
3 A Load Capacity: Supports a maximum combined servo load of DC 5 V at 3 A across all 8 channels.
Reverse-Power Protection: Helps protect the board against incorrect power-supply polarity.
Compact Form Factor: Measures 55 x 24 x 10.5 mm for integration into space-conscious robotic systems.
M5Stack Integration: Designed for straightforward use with compatible M5Stack host controllers and Grove-based projects.

Applications

Multi-servo control systems
Robot arms
Robotic joints
Pan-and-tilt mechanisms
Smart toys
Educational robotics
Automated mechanisms
Embedded motion-control systems
Multi-axis prototypes
M5Stack robotics projects

Model Size

Package Includes:

1 Unit 8Servos
1 HT3.96-4P
1 HY2.0-4P Grove Cable (20cm)