52. Case 51: Lifting Dry Rack#

52.1. 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.

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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

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Build it as the assembly steps suggest:

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52.2. Connection Diagram#

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

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52.3. MakeCode Programming#

Step 1#

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

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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.

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

Reference#

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

You may also download it directly:

Result#

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.