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  • Sonar:bit is a 3-wire ultrasonic module with the working voltage between 3-5V. It is available to be used to 3.3V or 5V micro-controller system. With only one 3-wire(GVS) cable, it can work properly. Compared to the normal 4-wire ultrasonic module, it has saved one IO port. The measurement range of sonar:bit is 4cm-400cm. It can output stable and accurate measurement data with ±1cm tolerance only.
  • It can connect to the Ring:bit with an expansion board.


  • Input voltage:3V~5V and can be driven by micro:bit directly.
  • Standard 3-wire GVS connecotr, which occupies 1 IO port only.


NameRing:bit car v2 sonar:bit-
Working VoltageDC 3-5V-
Connection3pin GVS connection-
Output SignalSimulation-
Measuring Distance4-400cm-
Dimmension40.60mm * 51.60mm-
Net Weight12g-


Quick to Start

Hardware Connection

  • Connect the acrylic transition board to the back board with the rivets.

  • Connect the Sonar:bit to the other side of the acrylic transition board with rivets.

  • Connect the Sonar:bit to the Ring:bit breakout board with a 3-pin wire.

Software Programming

  • Choose sonar:bit in makecode.
  • Search ringbit in the dialogue box and click it to download it.
  • Programme to measure the distance with ultrasonic in makecode on-line editor.


You can download it directly below:


  • The value measured by Sonar:bit is showing on the micro:bit.


case 10