Features: 1.Designed for RasPi: This robot expansion board is designed for RasPi 3B/2B/B+/A+, and data input and output can be completed via I2C bus. 2.I2C Interface: This robot motor control board has I2C interface compatible with 5V level, can be connected to other development board control; One I2C interface, applicable to various sensors, expand a variety of applications. 3.16 Channel PWM Output: The address of the expansion board is determined by 4 address pins, and maximum of 16 expansion boards are used simultaneously. Support 16 channel PWM output, and it can control 16 channel steering gear or LED lights. 4.12 Bit Resolution: This servo motor driver board adopts 12 bit resolution, adjustable PWM frequency up to 1.6KHz, configurable push pull or open drain output. 5.Multi Function: This motor drive controller board for RasPi supports 4 way steering gear interface, 3P standard interface, easy to connect the steering gear and LED lights. Support 2 channel 6V to 12V stepper motors. Support 4 6V to 12V gear motor. Support infrared receiving function, convenient infrared control.specification:Item Type: Robot Expansion Board for RasPi Material: Printed Circuit Board Operating Voltage: 5V to 12V Interface: I2C Interface Explanation: 4 Way Actuator Interface (Type 0, Type 1, Type 14, Type 15) 4 Way Motor Interface (M1,M2,M3,M4) 2 Way Stepper Motor Interface (M1+M2,M3+M4) I2C Port InterfacePackageList:1 x RobotExpansionBoardforRasPi