Home Code Micro:bit RGB led examples in Micropython

Micro:bit RGB led examples in Micropython

by shedboy71

Tri-color LEDs contain three different LED emitters in one case. Each emitter is connected to a separate lead so they can be controlled independently. A four-lead arrangement is typical with one common lead (anode or cathode) and an additional lead for each color. Others, however, have only two leads (positive and negative) and have a built-in electronic controller.

I used an RGB LED module, I find this is easier than using a breadboard with an RGB led and required resistors

Parts List

Name Link
Micro:bit Micro:bit Development Board
RGB Board Full Color LED Module 10mm Bright RGB Board Electronic Building Blocks For Arduino
Edge Breakout I/O Expansion Edge Breakout I/O Expansion Extension Board for BBC micro:bit
Connecting cables Free shipping Dupont line 120pcs 20cm male to male + male to female and female to female jumper wire

Layout

 

microbit and rgb led example

microbit and rgb led example

Code

The first example just shows some extra colour combinations

from microbit import *
 
while True:  
    pin0.write_digital(0)
    pin1.write_digital(1)
    pin2.write_digital(1)
    sleep(500)
    pin0.write_digital(1)
    pin1.write_digital(0)
    pin2.write_digital(1)
    sleep(500)
    pin0.write_digital(1)
    pin1.write_digital(1)
    pin2.write_digital(0)
    sleep(500)
    pin0.write_digital(0)
    pin1.write_digital(0)
    pin2.write_digital(1)
    sleep(500)
    pin0.write_digital(1)
    pin1.write_digital(0)
    pin2.write_digital(0)
    sleep(500)
    pin0.write_digital(0)
    pin1.write_digital(1)
    pin2.write_digital(0)
    sleep(500)
    pin0.write_digital(0)
    pin1.write_digital(0)
    pin2.write_digital(0)
    sleep(500)

The next example displays a colour depending on whether button a, button b or no button is pressed

from microbit import *
while True:
    if button_a.is_pressed():
        pin0.write_digital(0)
        pin1.write_digital(1)
        pin2.write_digital(1)
    elif button_b.is_pressed():
        pin0.write_digital(1)
        pin1.write_digital(0)
        pin2.write_digital(1)
    else:
        pin0.write_digital(1)
        pin1.write_digital(1)
        pin2.write_digital(0)

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