84 lines
1.9 KiB
Python
84 lines
1.9 KiB
Python
# CircuitPython demo - NeoPixel RGBW
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import time
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import board
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import neopixel
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pixel_pin = board.A1
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num_pixels = 8
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pixels = neopixel.NeoPixel(pixel_pin, num_pixels, bpp=4, brightness=0.3, auto_write=True)
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def wheel(pos):
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# Input a value 0 to 255 to get a color value.
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# The colours are a transition r - g - b - back to r.
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if pos < 0 or pos > 255:
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return 0, 0, 0, 0
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if pos < 85:
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return int(255 - pos*3), int(pos*3), 0, 0
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if pos < 170:
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pos -= 85
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return 0, int(255 - pos*3), int(pos*3), 0
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pos -= 170
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return int(pos * 3), 0, int(255 - (pos*3)), 0
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def color_chase(wait):
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for i in range(num_pixels):
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pixels[i] = RED
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time.sleep(wait)
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time.sleep(0.5)
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for i in range(num_pixels):
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pixels[i] = YELLOW
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time.sleep(wait)
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time.sleep(0.5)
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for i in range(num_pixels):
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pixels[i] = GREEN
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time.sleep(wait)
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time.sleep(0.5)
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for i in range(num_pixels):
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pixels[i] = CYAN
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time.sleep(wait)
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time.sleep(0.5)
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for i in range(num_pixels):
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pixels[i] = BLUE
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time.sleep(wait)
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time.sleep(0.5)
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for i in range(num_pixels):
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pixels[i] = PURPLE
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time.sleep(wait)
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time.sleep(0.5)
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def rainbow_cycle(wait):
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for j in range(255):
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for i in range(num_pixels):
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idx = int((i * 256 / num_pixels) + j)
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pixels[i] = wheel(idx & 255)
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time.sleep(wait)
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RED = (255, 0, 0, 0)
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YELLOW = (255, 150, 0, 0)
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GREEN = (0, 255, 0, 0)
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CYAN = (0, 255, 255, 0)
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BLUE = (0, 0, 255, 0)
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PURPLE = (180, 0, 255, 0)
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while True:
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pixels.fill(RED)
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time.sleep(1) # Increase or decrease to change the speed of the solid color change.
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pixels.fill(GREEN)
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time.sleep(1)
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pixels.fill(BLUE)
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time.sleep(1)
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color_chase(0.1) # Increase the number to slow down the color chase
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rainbow_cycle(0) # Increase the number to slow down the rainbow
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