Description The M5Stack C-Back HAT is a servo driver expansion board for M5StickC projects. It uses an STM32F030F4P6 control solution and communicates with M5StickC through the I2C interface. The board provides four PWM servo drive interfaces. The servo drive power is directly connected to the M5StickC internal battery, which can drive common servo models such as SG90 according to the official product description. The M5Stack C-Back HAT also brings the I2C bus out from the top of the StickC and provides an additional GPIO interface through the STM32 for general logic-level input/output and ADC analog signal input reading. LEGO-compatible holes on the back make it easier to integrate the driver board into LEGO-style structures and servo robotic arm projects. Product Video Features Four servo drive channels: provides 4 x PWM servo driving interfaces. M5StickC compatibility: compatible with M5StickC and M5StickC Plus series projects. STM32F030F4P6 control: uses an STM32F030F4P6 control solution for the driver board. I2C communication: communicates over I2C at address 0x38. Interface expansion: exposes I2C and provides additional GPIO through STM32 expansion. ADC input support: supports analog signal input reading through the built-in ADC. LEGO-compatible mounting: includes back-side LEGO-compatible holes for structural integration. Specifications MCU STM32F030F4P6 Communication Interface I2C @ 0x38 Servo Drive Interfaces 4 x PWM servo drive Working Current 15mA Product Size 23.7 x 49.2 x 21.0mm Product Weight 9.0g Package Size 138.0 x 93.0 x 22.0mm Gross Weight 13.5g Applications Servo control projects Robot control Servo robotic arm structures LEGO-style controllable mechanisms M5StickC interface expansion experiments Product List 1 Hat CBack Driver 2 Hexagon Screw M2 x 5 1 Hex Key L-Shape 1 LEGO Compatible Connector Other Content Power and Interface Notes I2C Address 0x38 Servo Power Servo drive power is directly connected to the M5StickC internal battery. Typical Servo Example General specification servos such as SG90 are listed by the official description. Expansion I2C bus, GPIO logic-level input/output, and ADC analog input reading. Mounting Back-side LEGO-compatible hole design. The M5Stack C-Back HAT is an expansion HAT. The official product list does not include an M5StickC controller or servos. Resources M5Stack C-Back HAT documentation FAQ What is the M5Stack C-Back HAT used for? It is a servo driver HAT for M5StickC projects, suitable for servo control, robot control, and servo robotic arm structures. How many servos can it drive? The official description lists four PWM servo drive interfaces. What communication interface does it use? The board communicates through I2C at address 0x38. What is included in the package? The official product list includes 1 x Hat CBack Driver, 2 x M2 x 5 hexagon screws, 1 x L-shape hex key, and 1 x LEGO compatible connector. Does the package include an M5StickC controller or servos? No. The official product list does not include an M5StickC controller or servos.
