6. Case 05: Automatic Dryer

6.1. Introduction

To make an automatic dryer with a micro:bit.

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6.2. Quick Start

Materials Required

Nezha expansion board × 1

micro:bit × 1

Sonar:bit × 1

Motor × 1

RJ11 wires × 1

Bricks details

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Connection Diagram

  • Connect the sonar:bit to J1 and the motor to M1 on the Nezha expansion board as the picture shows.

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Assembly

Build a device as the picture shows:

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Video reference: https://youtu.be/5kB0bYEsJ1c

6.3. MakeCode Programming

Step 1

Click “Advanced” in the MakeCode to see more choices.

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For programming, we need to add a package: click “Extensions” at the bottom of the MakeCode drawer and search with “PlanetX” in the dialogue box to download it.

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For programming, we need to add a package: click “Extensions” at the bottom of the MakeCode drawer and search with “nezha” in the dialogue box to download it.

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Notice: If you met a tip indicating that some codebases would be deleted due to incompatibility, you may continue as the tips say or create a new project in the menu.

Step 2

Code as below:

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Reference

Link：https://makecode.microbit.org/_LTA1RLL1ddfM

You may also download it directly below:

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Result

  • While there is any object detected by the Sonar:bit, the fan moves automatically.