This micro:bit expansion board breaks out 9 of the micro:bit onboard GPIO interfaces, and also comes with a 4-way motor driver and 8x servo interfaces, of which 4-way motor drivers can be reused as 2-way stepper motor drivers!
The board adopts an I2C external drive chip to control the motor and servo motors and only takes up two I2C pins, allowing motor and servo dual control without occupying other resources.
Using an HR8833 motor driver, the maximum continuous operating current is 1.5A - great for driving an ordinary small motor and N20 mini metal motor. Each motor port comes with a positive and negative rotating indicator to identify the motor running direction.
Both the extended GPIO and the servo interfaces use the DFRobot Gravity standard interface, supporting a large number of modules and sensors. The servo interface is directly connected to the Vin power supply, thus increasing the supply current which can support multiple servos to work at the same time.
This expansion board supports a 3.5V-5.5V power supply. It provides a DC 2.1 plug and a wiring terminal which can be connected directly to battery boxes. It comes with a USB to DC 2.1 adapter cable, which can be powered by a power bank.
Specification
- Digital Output Voltage: 0V / 3.3V
- Analog Output Voltage: 0~3.3V DC
- Standard Gravity Interface
- Micro: bit Interface: 9 (P0 P1 P2 P8 P12 P13 P14 P15 P16)
- Servo Interfaces x 8
- Motor Interface: DC Motor x 4 / Step Motor x 2
- Dimension: 63x58mm
Resources
- Product Wiki
- More Documents
Package Contents
- 1x Micro:bit Driver Expansion Board
- 1x USB to DC2.1 converter cable
Note: micro:bit not included
