2. Case 01: Traffic Lights¶
To make a traffic lights system controlled by the micro:bit.
2.2. Quick Start¶
Nezha expansion board × 1
micro:bit × 1
LED-red × 1
LED-green × 1
LED-yellow × 1
RJ11 wires × 3
Connect the red LED to J1, yellow LED to J2 and green LED to J3 on the Nezha expansion board as the picture shows.
2.3. 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.
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 red LED lights on for 5 seconds and then lights off; the yellow LED lights on for 2 seconds and off then; the green LED lights on for 5 seconds and off then.