29. Case 28: The Corridor Lights

29.1. Introduction

This is a smart corridor light, which judges whether it needs to be turned on by the sound level and light level. Only when the light is dim and the sound of people walking is detected, the light will be automatically turned on, which saves more energy.


29.2. Quick Start

Materials Required

Nezha expansion board × 1

micro:bit V2 × 1

Rainbow LED ring × 1

Bricks × n

Tips:Purchase Interactive coding accessories pack here.

Connection Diagram

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


Assembly Video

Video link: https://youtu.be/9LZHzZaXf8Y

Assembly Steps






29.3. 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



Link: https://makecode.microbit.org/_7xqU5vTRwdvb

You may download it directly below:



After powering on, the rainbow led ring lights on/off by its ambient light and sound level.