# Case 24: The Top Emitter

## Purpose
---
Make a top emitter.
 
![](./images/Wonder-Building-Kit-case-24-01.png)

## Link: 
---
[micro:bit Wonder Building Kit](https://shop.elecfreaks.com/products/elecfreaks-micro-bit-32-in-1-wonder-building-kit-without-micro-bit-board?_pos=5&_sid=2094afd2f&_ss=r)

## Materials Required
---
![](./images/Wonder-Building-Kit-step-case-24-01.png)

## Bricks build-up
---

![](./images/Wonder-Building-Kit-step-case-24-02.png)

![](./images/Wonder-Building-Kit-step-case-24-03.png)

![](./images/Wonder-Building-Kit-step-case-24-04.png)

![](./images/Wonder-Building-Kit-step-case-24-05.png)

![](./images/Wonder-Building-Kit-step-case-24-06.png)

![](./images/Wonder-Building-Kit-step-case-24-07.png)

![](./images/Wonder-Building-Kit-step-case-24-08.png)

![](./images/Wonder-Building-Kit-step-case-24-09.png)

![](./images/Wonder-Building-Kit-step-case-24-10.png)

![](./images/Wonder-Building-Kit-step-case-24-11.png)

![](./images/Wonder-Building-Kit-step-case-24-12.png)

![](./images/Wonder-Building-Kit-step-case-24-13.png)

![](./images/Wonder-Building-Kit-step-case-24-14.png)

![](./images/Wonder-Building-Kit-step-case-24-15.png)

![](./images/Wonder-Building-Kit-step-case-24-16.png)

![](./images/Wonder-Building-Kit-step-case-24-17.png)

![](./images/Wonder-Building-Kit-step-case-24-18.png)

![](./images/Wonder-Building-Kit-step-case-24-19.png)

![](./images/Wonder-Building-Kit-step-case-24-20.png)

![](./images/Wonder-Building-Kit-step-case-24-21.png)

![](./images/Wonder-Building-Kit-step-case-24-22.png)

![](./images/Wonder-Building-Kit-step-case-24-23.png)

![](./images/Wonder-Building-Kit-step-case-24-24.png)

![](./images/Wonder-Building-Kit-step-case-24-25.png)

![](./images/Wonder-Building-Kit-step-case-24-26.png)

![](./images/Wonder-Building-Kit-step-case-24-27.png)

![](./images/Wonder-Building-Kit-step-case-24-28.png)

![](./images/Wonder-Building-Kit-step-case-24-29.png)

![](./images/Wonder-Building-Kit-step-case-24-30.png)

![](./images/Wonder-Building-Kit-step-case-24-31.png)

## Hardware Connection

Connect a [motor](https://www.elecfreaks.com/geekservo-motor-2kg-compatible-with-lego.html) to M1, and the [servo](https://www.elecfreaks.com/geekservo-2kg-360-degrees-compatible-with-lego.html) to S1 ports on [Wukong breakout board](https://www.elecfreaks.com/wukong-board-with-lego-holder-for-micro-bit.html). 

![](./images/Wonder-Building-Kit-case-24-06.png)

## Software Platform
---
[MakeCode](https://makecode.microbit.org/)

## Coding
---
### Add extensions
Click "Advanced" in the MakeCode to see more choices.
 
![](./images/Wonder-Building-Kit-case-21-02.png)

Search with Wukong in the dialogue box to download it. 

![](./images/Wonder-Building-Kit-case-21-03.png)





### Program
 
![](./images/Wonder-Building-Kit-case-24-04.png)

Link:[https://makecode.microbit.org/_Vw1agAfMAccF](https://makecode.microbit.org/_Vw1agAfMAccF)

### Result

Place the gyro in the acceleration position, when the button A is pressed (long press) , the bottom baffle will support the small gyro on the baffle to accelerate the rotation; release the A button, the bottom baffle will move to the right, and the gyro falls off, then the motor will stop rotating.