12. Blue LED(EF05011)#

12.1. Introduction#

Blue LED is usually used as the indicator.

../_images/05011_01.png

12.3. Characteristic#

Designed in RJ11 connections, easy to plug.

12.4. Specification#

Item Parameter
SKU EF05011
Connection RJ11
Type of Connection Analog input
Working Voltage 3.3V
Size 55.8 x 23.8 mm

12.5. Outlook#

../_images/05011_02.png

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.

../_images/05011_03.png

12.7. MakeCode Programming#

12.7.1. Step 1#

Click “Advanced” in the MakeCode drawer to see more choices.

../_images/05001_04.png

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.

../_images/05001_05.png

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:#

../_images/05009_06.png

12.7.5. Result#

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

../_images/05001_072.png

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.

../_images/05001_081.png ../_images/05001_091.png ../_images/05009_10.png

12.8.2. Step 2#

12.8.3. Reference#

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)

12.8.4. Result#

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.

12.9. Relevant File#

12.10. Technique File#