12. Blue LED(EF05011)#
Blue LED is usually used as the indicator.
Designed in RJ11 connections, easy to plug.
|Type of Connection||Analog input|
|Size||55.8 x 23.8 mm|
12.6. Quick to Start#
12.6.1. Materials Required and Diagram#
Connect the Blue LED to J1 port and the potentiaometer to J2 port in the Nezha expansion board as the picture shows.
12.7. MakeCode Programming#
12.7.1. Step 1#
Click “Advanced” in the MakeCode drawer to see more choices.
We need to add a package for programming, . Click “Extensions” in the bottom of the drawer and search with “PlanetX” in the dialogue box to download it.
Note: If you met a tip indicating that the codebase will be deleted due to incompatibility, you may continue as the tips say or build a new project in the menu.
12.7.2. Step 2#
12.7.3. Code as below:#
The brightness is adjusted by the potentiometer.
12.8. Python Programming#
12.8.1. Step 1#
Download the package and unzip it: PlanetX_MicroPython
Go to Python editor
We need to add enum.py and led.py for programming. Click “Load/Save” and then click “Show Files (1)” to see more choices, click “Add file” to add enum.py and led.py from the unzipped package of PlanetX_MicroPython.
12.8.2. Step 2#
from microbit import * from enum import * from led import * led = LED(J1) while True: led.set_led(1,100) sleep(1000) led.set_led(1,50) sleep(1000) led.set_led(0,50) sleep(1000)
LED lights on in 100% brightness for one second and 50% brightness for another sencond and lights off for one second after powering on and it continues working in this way.