11. Case 10: Speed Adjustable Car¶
To make a speed adjustable car with a micro:bit.
11.2. Quick Start¶
Nezha expansion board × 1
micro:bit × 1
Potentiometer × 1
Motors × 2
RJ11 wires × 1
Build the body parts of the car:¶
Speed controller build-up¶
Connect the potentiometer to J1, the two motors to M1&M4 on the Nezha expansion board as the picture shows.
11.3. MakeCode Programming¶
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.
Code as below:¶
You may also download it directly below:---
The speed of the car could be adjusted by the potentiometer.