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Case 27: The Distance Indicator


This is a distance detection device. In order to prevent the spread of the epidemic, people should maintain a certain social distance in public. This device can display the distance between the carrier and the person in front of it on the screen.

Quick Start

Materials Required

Nezha expansion board × 1

micro:bit V2 × 1

sonar sensor × 1

Bricks × n

Tips: You may need to purchase Nezha Inventor's Kit if you want all the above compoents.

Connection Diagram

Inset the micro:bit, and connect the sonar:bit to J1 port on Nezha expansion board.

Assembly Video

Video link:

Assembly Steps

MakeCode Programming

Step 1

Click "Advanced" in the MakeCode drawer to see more choices.

We need to add a package for programming. Click "Extensions" in the bottom of the drawer and search with "nezha" to download it.

Note: If you met a tip indicating the codebase might be deleted due to incompatibility, you may continue as the tips say or create a new project in the menu.

Step 2

Programme as the pictures indicate



You may download it directly below:


After powering on, the detected distance displays on the micro:bit.