8ccfefa4c6
the strip turns the pixel off before it fades out, so moving the strip outside the for loop lets the fade out happen, then turns the pixel off.
44 lines
1.2 KiB
Python
44 lines
1.2 KiB
Python
import time
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import board
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import neopixel
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try:
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import urandom as random
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except ImportError:
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import random
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numpix = 3 # Number of NeoPixels
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pixpin = board.D1 # Pin where NeoPixels are connected
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strip = neopixel.NeoPixel(pixpin, numpix, brightness=.1, auto_write=True)
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colors = [
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[30, 144, 255], # Dodger Blue
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[232, 100, 255], # Purple
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[204, 0, 204], # Pink
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[200, 200, 20], # Yellow
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[30, 200, 200], # Blue
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]
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def flash_random(wait, howmany):
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for _ in range(howmany):
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c = random.randint(0, len(colors) - 1) # Choose random color index
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j = random.randint(0, numpix - 1) # Choose random pixel
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strip[j] = colors[c] # Set pixel to color
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for i in range(1, 5):
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strip.brightness = i / 5.0 # Ramp up brightness
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time.sleep(wait)
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for i in range(5, 0, -1):
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strip.brightness = i / 5.0 # Ramp down brightness
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time.sleep(wait)
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strip[j] = [0, 0, 0] # Set pixel to 'off'
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while True:
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# first number is 'wait' delay, shorter num == shorter twinkle
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flash_random(.01, 1)
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# second number is how many neopixels to simultaneously light up
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flash_random(.01, 3)
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flash_random(.01, 2)
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