Makerspace

Now let’s use the buttons on the device to turn individual LEDs on and off. We use the cp.button_a and cp.button_b properties to determine if the given button is being pressed down:

from adafruit_circuitplayground import cp

while True:
    if cp.button_a:
        cp.pixels[0] = (255, 255, 255)
    elif cp.button_b:
        cp.pixels[1] = (255, 255, 255)

Challenge Problem 1

Modify the code above so that only one pixel is on at a time. In other words, if multiple buttons are pressed in a sequence, only the most recent pixel stays on.

Hint: consider using cp.pixels.fill

Challenge Problem 2

Now modify the code so that each pixel is on only as long as the user holds down the button.

References

• Python: if/elif/else

• cp.button_a

• cp.button_b