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Micro:Mate - A Mini Expansion Board for micro:bit (Gravity Compatible)

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    Micro:Mate is a tiny micro:bit I/O expansion board for learning electronics and building DIY projects.
    Micro:Mate expands 6 sets of 3-pin I/O interfaces, capable of connecting DFRobot Gravity series modules, servo motors, sensorsand jumper wires. Additionally, Pin 8, 12, 16 support voltage switch between 3V-5V, allowing up to 5V 2A digital (PWM) output.
    Micro:Mate is in the same dimension of micro:bit. It connects to micro:bit through contact pins (with spring loaded), ensuring easy, compact and secure connection. The rubber bumpers and the 3.5mm audio jack on the back side keep the expansion installed stably on the board, meanwhile prevents reversed connection.

    The mounting screws should be well tightened to ensure a secured connection.
    Micro:Mate only supports 3V (3.3V) analog input from Pin 0, 1, 2. The Micro USB
    Power port on Micro:Mate cannot be used for data transmission.
    Components with large power consumption should be connected to Pin 8, 12, 16, with 5V power supply.

    Product Image
    Product Name Micro:bit - an Educational & Creative Tool for Kids Micro:Mate - A Mini Expansion Board for micro:bit (Gravity Compatible) micro:bit Expansion Board for Boson (Gravity Compatible)
    SKU DFR0497 DFR0518 DFR0521
    Operating Voltage 3.5~5.5V 3.3V/5V 3.3V
    Power supply  DC2.1/Terminals USB USB
    External supply voltage 3.5~5.5V 3.3V/5V 3.3V/5V
    Digital ports (IO/PWM) 17/8 3 3
    Analog ports (input/output) P0、P1、P2 3 3
    UART x x x
    I2C 2 x x
    SPI x x x
    Interrupt pin (quantity) x x x
    Interface Type Gravity Gravity Gravity
    3.5mm headphone port x
    Dimension 63 x 58 mm 68.5×53.3 mm 80×70 mm
    Mounting hole  50*55 - -
    Weight (g) 64 23 48
    Price $14.9 $5.9 $7.9
    Drive the servo x
    Scenarios Many motors and sensors needed Suitable for small Works Initial Stage
    Key Features

    17 io ports with 2 i2c interfaces

    Can drive Quad DC Motor Driver

    IO port expands 6 and the pin replaces the edge connector slot

    Anti-reverse pad on the back, which protects the control board and prevents micro-reverse
    Drive high current equipment, such as steering gear, components connected to 8 12 16

    3-Pin fool-proof connector x 6

    Edge Connector


    Project 1: OBLOQ-IoT Module +Micro:bit IoT Flower Watering

    Hardware list:  
    Gravity: UART OBLOQ – IOT Module (Microsoft Azure) 
    Micro:Mate - A Mini Expansion Board for micro:bit (Gravity Compatible) 
    Micro:bit - an Educational & Creative Tool for Kids 
    9g Metal Gear Micro Servo (1.8Kg) 
    One bottle and part of tube 
    Gravity: Analog Capacitive Soil Moisture Sensor- Corrosion Resistant 

    Project 2: Microbit Projects: Yes/No Bear

    There are 2 possible answers. Either yes or no. We randomly generate the outcome when a button is pressed. When the answer is yes, the display will show Y & the tilt servo will response. When no, the display will show N and pan servo will response. 
    Part needed 
    2 x 9G servo motor 
    1 x microbit 
    1 x micro:mate(breakout board) 
    1 x Pan tilt kit 
    1 x stuffed toy bear 

    Project 3: Micro:bit car with DFRobot gamepad

    What you need? 
    Arcylic car chassis with 3 wheels (kit) 
    L9110 Dual Channel Motor Driver Module 
    micro:bits x 2 
    micro:bit mate 
    Double sided tape to stick the battery holder to the acrylic 
    Glue gun to immobilize the back wheel 
    Dupont cables 

    Project 4:  LED writing board (micro:bit compatible)

    The LED writing board is created using a photo frame that is surrounded with LED strip lights. When button A is pressed, the led strip turns white and flash. When button B is pressed, a random color is generated. To off, press button A and B together.
    Hardware components: 

    • photo frame
    • RGB individually addressable LED strip (neo pixels)
    • microbit
    • micro:mate(breakout board)    

    Microbit Project 5: Basketball score counter

    Part needed

    • IR sensor *1
    • micro:bit *1
    • micro:mate(breakout board) *1
    • Gravity: Digital Speaker Module *1
    • Dupont cables *1
    • Basketball hoop *1

    Project 6. Magnet switch lamp with micro:bit
    Components list

      • Micro:bit
      • Micromate
      • magnet
      • 8 x ws2812 5050 led ring
      • Dupont cables
      • Christmas Ornaments
    Project 7: Micro:bit Missile Launcher

    Hardware components: 

    • 9G servo motor *2
    • micro:bit *1
    • micro:mate(breakout board) *1
    • Pan tilt kit *1
    • Dual-axis XY Joystick Module *1
    • 2n2222 transistor *1
    • WLtoys Missile shooter *1
    • Dupont cables 

    Project 8. micro:bit Christmas tree

    Hardware components: 

    • Micro:bit *1
    • Micro:Mate - A Mini Expansion Board for micro:bit  *1
    • 360 servo *1
    • DFPlayer - A Mini MP3 Player For Arduino *1
    • Dupont cables *1


    • Color coded Gravity 3-Pin interface, compatible with hundreds of plug&play electronic modules
    • 3-way analog input; 6-way digital input/output (PWM); 3V/5V jumper switch; 3.5mm audio jack
    • External Micro USB power port, up to 5V 2A power output.
    • Well-designed component lay-out and silk-screen. Reversed connection protection.


    • Interface: 6 x Gravity 3Pin
    • Operating Voltage: 5V/3.3V
    • Input Power: <10W
    • Measuring Range: 0-3.3V (Analog), 0-5V (Digital):
    • Dimension:68.5 * 53.3mm/ 2.7 * 2.1 inches
    • Weight:22.8g



    • Micro:Mate Gravity Expansion Board x1
    • Brass nut M4*5*4 x2
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