# case 21 An Oscillating Fan

## Introduction

Combine the motor and the servo to make a common head-shaking fan in daily life, and control the fan head-shaking function and turn it on and off by pressing the button.

![](./images/case_21_01.png)

## Quick Start

### Materials Required

Nezha expansion board × 1

micro:bit × 1

360°servo × 1

Motor × 1

Bricks × n


***Tips: You may need to purchase [Nezha Inventor's Kit](https://shop.elecfreaks.com/products/elecfreaks-micro-bit-nezha-48-in-1-inventors-kit-without-micro-bit-board?_pos=2&_sid=ed1b6fbd2&_ss=r) if you want all the above compoents.***


### Connection Diagram

Connect the servo to S1, motor to M1 and the micro:bit to Nezha expansion board. 


![](./images/case_21_03.png)



### Assembly Video

Video:[https://youtu.be/Ysg-t4QNmo8](https://youtu.be/Ysg-t4QNmo8)

<iframe width="560" height="315" src="https://www.youtube.com/embed/Ysg-t4QNmo8" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>


### Assembly Video

![](./images/case_step_21_01.png)

![](./images/case_step_21_02.png)

![](./images/case_step_21_03.png)

![](./images/case_step_21_04.png)

![](./images/case_step_21_05.png)

![](./images/case_step_21_06.png)

![](./images/case_step_21_07.png)

![](./images/case_step_21_08.png)

![](./images/case_step_21_09.png)

![](./images/case_step_21_10.png)

![](./images/case_step_21_11.png)

![](./images/case_step_21_12.png)

![](./images/case_step_21_13.png)

![](./images/case_step_21_14.png)


## MakeCode Programming

### Step 1
Click “Advanced” in the MakeCode drawer to see more choices.

![](./images/case_01_10.png)

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

![](./images/case_03_09.png)


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


### Programme as the picture shows:


![](./images/case_21_17.png)



### Link
Link：[https://makecode.microbit.org/_hWzUHCY0yioM](https://makecode.microbit.org/_hWzUHCY0yioM)

You may also downoad it directly below:


<div style="position:relative;height:0;padding-bottom:70%;overflow:hidden;"><iframe style="position:absolute;top:0;left:0;width:100%;height:100%;" src="https://makecode.microbit.org/#pub:_hWzUHCY0yioM" frameborder="0" sandbox="allow-popups allow-forms allow-scripts allow-same-origin"></iframe></div>  



### Result
Turn on/off the fan by pressing button A/B.

![](./images/case-gif-21.gif)