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Case 08: Speed Adjustable Fans

Introduction​

Use the potentiometer and the motor to make a knob to control the fan, and you can use the knob to control the speed of the fan.

Quick Start​

Materials Required​

Nezha expansion board × 1

micro:bit × 1

Potentiometer × 1

Motor × 1

RJ11 wire × 1

Tips: You may need to purchase Nezha Inventor's Kit if you want all the above compoents.

Connection Diagram​

Connect the potentiometer to J1 and motor to M1 on the Nezha expansion board as the picture shows.

Assembly Video​

Video reference: https://youtu.be/1-FaQU7Yj0k

Assembly Steps​

MakeCode Programming​

Step 1​

Click "Advanced" in the MakeCode to see more choices.

For programming, we need to add a package: click "Extensions" at the bottom of the MakeCode drawer and search with "PlanetX" in the dialogue box to download it.

For programming, we need to add a package: click "Extensions" at the bottom of the MakeCode drawer and search with "nezha" in the dialogue box 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.

Step 2​

Code as below:​

Reference​

Link：https://makecode.microbit.org/_RK1WTKEMyfit

You may also download it directly below:

Result​

Adjust the speed of the fan via the potentiometer.