circuit-python-qtpy-neopixel

# -------------------------------------------------------------------- #
# CircuitPython Analog In detection set RGB to random color example
# -------------------------------------------------------------------- #

import time, board, neopixel, random
from analogio import AnalogIn

analog_in = AnalogIn(board.A1)
led = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=1)

def get_voltage(pin):
    return (pin.value * 3.3) / 65536


while True:
    read_analog_in = get_voltage(analog_in)
    neo_color = [random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)]
    
    print((read_analog_in))
    
    if read_analog_in < 1:
        led.fill(neo_color)
        print(neo_color)
    else:
        led.fill([0,0,0])
    time.sleep(0.5)
    

# --------------------------------------- #
# CircuitPython 7 slow color fade qtpy
# --------------------------------------- #

# import time, board, neopixel

# try:
#     from rainbowio import colorwheel
# except:
#     def colorwheel(pos):
#         if pos < 0 or pos > 255:  return (0, 0, 0)
#         if pos < 85: return (255 - pos * 3, pos * 3, 0)
#         if pos < 170: pos -= 85; return (0, 255 - pos * 3, pos * 3)
#         pos -= 170; return (pos * 3, 0, 255 - pos * 3)

# led = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=1)

# while True:
#     led.fill( colorwheel((time.monotonic()*50)%255) )
#     time.sleep(0.05)