31. Case 30: Adjustable lights

31.1. Introduction

This is an adjustable LED light. We can adjust the brightness of the light through the potentiometer, so that the light is at our most comfortable brightness.


31.2. Quick Start

Materials Required

Nezha expansion board × 1

micro:bit V2 × 1

Analog Rotation Potentiometer × 1

Rainbow LED ring × 1

Bricks × n

Tips: Purchase Interactive coding accessories pack here.

Connection Diagram

Inset the micro:bit, connect the rainbow led ring to J1 port and the trimpot to J2 port on Nezha expansion board.


Assembly Video

Video link: https://youtu.be/IDo75YvbOB8

Assembly Steps






31.3. 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/_9zD1etLWh36q

You may download it directly below:



After powering on, the luminance level is able to be adjusted by the trimpot.