55. Case 51: Lifting Dry Rack#

55.1. Introduction#

When we do our daily chores, washing clothes should be considered a task that we often have to do, especially after washing clothes in the washing machine, drying clothes on top of a high drying rack is particularly laborious. Well, in order to solve this trouble, we do a lifting drying rack here, which not only can help us save physical strength, but also give us the experience of the way that is getting changed from the technology.


Materials Required#

Nezha expansion board × 1

micro:bit V2 × 1

Ultrasonic sensor × 1

RJ11 cable × 1

Bricks × n

Note: If you want all of the above components, you may purchase the Nezha 48 IN 1 Inventor’s Kit.

Assembly Steps#

Component Details


Build it as the assembly steps suggest:
















55.2. Connection Diagram#

Connect the two motors to the M1 and M4 , and the ultrasonic sensor to the J1, as the diagram suggests.


55.3. MakeCode Programming#

Step 1#

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


For programming the servo, we need to add a package. Click “Extensions” at the bottom of the drawer and search with “nezha” to download it.


For programming the PIR sensor, we need to add a package. Search with “PlanetX” in the dialogue box and click to download it.


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.



Link: https://makecode.microbit.org/_h9DHW1dEa6rT

You may also download it directly:


When we want to dry the clothes, press the A button, the drying rack will drop, and when the clothes rack is placed on the drying rod, the drying rack will automatically rise.