Robotbit - robotics expansion board for micro:bit

by KittenBot

Robotbit is a robotic expansion board specially designed for micro:bit by the KittenBot team.

It has a powerful ability to drive DC motors, stepper motors, and servos. It also comes with an onboard buzzer, four RGB pixels and releases all valid IO from micro:bit, with support for the most common electronics module in the market.

It comes with an 18650 battery holder, integrated lithium battery boost, charging and protection chip. Support for external power input. Mechanical support for a robotic chassis and LEGO technical slots.

For more details and tutorials please click here

micro:bit, Kitty Case and battery are not included.

SUPPORTED SOFTWARE

  • Kittenblock (based on Scratch3.0)
  • Makecode and python(Mu editor in microbit mode)

HARDWARE INTERFACE

  1. 5V external power input（with anti-reverse protection）
  2. Power switch
  3. Power Indicator
  4. Battery Indicator
  5. Micro USB charging port
  6. 4-channel DC motor / 2-channel stepper motor
  7. Jumper for buzzer selection
  8. 8 channel IO（corresponding to Micro:bit P0-P2、P8、P12-P15）
  9. 5V and GND port
  10. Buzzer
  11. 8 channel servo port
  12. I2C interface (expandable I2C module)
  13. 18650 battery case
  14. Battery protection recovery push button
  15. Micro:bit edge connector
  16. 4x RGB pixel
  17. Servo driver (PCA9685)
  18. 2xDc/Stepper driver (DRV8833)
  19. KittenBot robot chassis mounting hole
  20. Standard LEGO hole

Specifications

  • Dimensions: 78mm x 57mm x 23mm
  • PCB Thickness: 1.5mm
  • Small mechanical hole: 3.0mm
  • Big mechanical hole: 4.8mm
  • Net weight (without packaging): 37.5g
  • 18650 battery voltage: 3.7V
  • USB input voltage: 5V
  • VM pin max output: 1A (with onboard battery)
  • External Voltage Input (the green terminal): 5V (only supports 5V input, do not connect over 5V, maximum current supports 3A)