# Case 01：The Mechanical Shrimp 

## Introduction
Build a mechanical shrimp with the [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). 

![](./images/neza-inventor-s-kit-case-37-01.png)

## Quick to Start


### Materials Required

[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)

### Assembly

Components List

![](./images/neza-inventor-s-kit-case-37-02.png)

Build it as the assembly steps suggest: 

![](./images/neza-inventor-s-kit-step-37-01.png)

![](./images/neza-inventor-s-kit-step-37-02.png)

![](./images/neza-inventor-s-kit-step-37-03.png)

![](./images/neza-inventor-s-kit-step-37-04.png)

![](./images/neza-inventor-s-kit-step-37-05.png)

![](./images/neza-inventor-s-kit-step-37-06.png)

![](./images/neza-inventor-s-kit-step-37-07.png)

![](./images/neza-inventor-s-kit-step-37-08.png)

![](./images/neza-inventor-s-kit-step-37-09.png)

![](./images/neza-inventor-s-kit-step-37-10.png)

![](./images/neza-inventor-s-kit-step-37-11.png)

![](./images/neza-inventor-s-kit-step-37-12.png)

![](./images/neza-inventor-s-kit-step-37-13.png)

![](./images/neza-inventor-s-kit-step-37-14.png)

![](./images/neza-inventor-s-kit-step-37-15.png)

![](./images/neza-inventor-s-kit-step-37-16.png)

![](./images/neza-inventor-s-kit-step-37-17.png)

![](./images/neza-inventor-s-kit-step-37-18.png)

![](./images/neza-inventor-s-kit-step-37-19.png)

![](./images/neza-inventor-s-kit-step-37-20.png)

![](./images/neza-inventor-s-kit-step-37-21.png)

![](./images/neza-inventor-s-kit-step-37-22.png)

![](./images/neza-inventor-s-kit-step-37-23.png)

![](./images/neza-inventor-s-kit-step-37-24.png)

![](./images/neza-inventor-s-kit-step-37-25.png)

![](./images/neza-inventor-s-kit-step-37-26.png)

![](./images/neza-inventor-s-kit-step-37-27.png)

![](./images/neza-inventor-s-kit-step-37-28.png)

![](./images/neza-inventor-s-kit-step-37-29.png)

![](./images/neza-inventor-s-kit-step-37-30.png)

![](./images/neza-inventor-s-kit-step-37-31.png)

![](./images/neza-inventor-s-kit-step-37-32.png)

![](./images/neza-inventor-s-kit-step-37-33.png)

### Connection Diagram

Connect the [Ultrasonic Sensor](https://shop.elecfreaks.com/products/elecfreaks-planetx-ultrasonic-sensor?_pos=1&_sid=d432fa273&_ss=r) to J1, the [geekservo](https://shop.elecfreaks.com/products/elecfreaks-360-degrees-building-blocks-servo?_pos=2&_sid=bb30ff66c&_ss=r) to S1 and the two [motors](https://shop.elecfreaks.com/products/elecfreaks-high-speed-building-blocks-motor?_pos=4&_sid=bfad50d7f&_ss=r) to M1 and M4 on [Nezha Breakout Board](https://shop.elecfreaks.com/products/elecfreaks-nezha-breakout-board?_pos=1&_sid=c41e367c3&_ss=r).

![](./images/neza-inventor-s-kit-case-37-03.png)


## MakeCode Programming



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

![](./images/neza-inventor-s-kit-case-37-04.png)

For programming the [Ultrasonic Sensor](https://www.elecfreaks.com/planetx-ultrasonic.html), we need to add a package. Search with "PlanetX" in the dialogue box and click to download it. 

![](./images/neza-inventor-s-kit-case-37-05.png)

For programming [Nezha Breakout Board](https://www.elecfreaks.com/nezha-breakout-board.html), we need to add a package. Search with "Nezha" in the dialogue box and click to download it. 

![](./images/neza-inventor-s-kit-case-37-06.png)

*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 the picture suggests

![](./images/neza-inventor-s-kit-case-37-07.png)


### Reference
Link: [https://makecode.microbit.org/_iscUF8CzzYMd](https://makecode.microbit.org/_iscUF8CzzYMd)

You may also download it directly: 

<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:_iscUF8CzzYMd" frameborder="0" sandbox="allow-popups allow-forms allow-scripts allow-same-origin"></iframe></div>  


### Result

After powering on, the mechanical shrimp moves forward and waves the princers, it will turn the directions if there is obstacles  being detected. 
![](./images/case_0101.gif)