Ring:bit Car is a $20 Robot Kit for BBC Micro:bit

Elecfreaks has launched a robot kit designed for BBC Micro:bit that comprised of a chassis, and Ring:bit board with 3 channels of GPIO, among which 2 channels are used for driving servos.

The kit can be used to teach children to control a mini car using Microsoft MakeCode visual programming editor.


Ring:bit board specifications:

  • Supports up to 3 servos with up to 2x external line detection modules when being shifted to P2.
  • Misc – Power switch, function selection
  • Power Supply
    • 3x AAA batteries.
    • Input Voltage – 3.9V-4.5V DC
  • Dimension – 65.00 x 51.70 mm
  • Weight – 27 grams
Click to Enlarge

The rest of the kit includes plastic parts for the chassis, two plastic gears, two servos, as well as screws for assembly.

Documentation is somewhat limited, but you’ll find a user guide at the bottom of Ring:bit board product page, and the company points to a tutorial on Tinkercademy.

As mentioned earlier, programming can be done with MakeCode programming interface, and a typical programming block may look as the one below.

Ring:bit car kit can be purchased for $19.90 on Elecfreaks, and you’ll need to add your own Micro:bit board and battery, or if you just want to use your own chassis, you can buy Ring:bit board only for $7.90.

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