4. Case 03: Automatic Gate
A simple automatic sensor door. When the ultrasonic sensor detects that a person is approaching, the micro:bit controls the servo to automatically open the door. When no person is approaching, the micro:bit controls the servo to automatically close the door.
4.2. Quick Start
Nezha expansion board × 1
micro:bit × 1
360° servo × 1
Sonar:bit × 1
RJ11 wire × 1
Connect the 360° servo to S1 and the ultrasonic sound sensor to J1 on the Nezha expansion board as the picture shows.
Video reference: https://youtu.be/nOh7YCmcotA
4.3. 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:
While the ultrasonic sound sensor detects any object, the gate opens automatically.