Case 10: Speed Adjustable Car
14. 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.
14.2. Quick Start#
Nezha expansion board × 1
micro:bit × 1
Potentiometer × 1
Motors × 2
RJ11 wires × 1
Tips: You may need to purchase Nezha Inventor’s Kit if you want all the above compoents.
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
14.3. 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.