11. Case 10: Speed Adjustable Car
This is an adjustable speed car, we can control the speed of the it through the potentiometer installed at the back side.
11.2. Quick Start
Nezha expansion board × 1
micro:bit × 1
Potentiometer × 1
Motors × 2
RJ11 wires × 1
Connect the potentiometer to J1, the two motors to M1&M4 on the Nezha expansion board as the picture shows.
Video reference: https://youtu.be/bVa5-wrcoeA
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.