108 lines
3.2 KiB
Python
Executable file
108 lines
3.2 KiB
Python
Executable file
# SPDX-FileCopyrightText: 2020 Kattni Rembor for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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"""Basic NeoPixel LED animations for the QT Py."""
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import time
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import board
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from rainbowio import colorwheel
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import neopixel
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# Update this to match the pin to which you connected the NeoPixels
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pixel_pin = board.A3
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# Update this to match the number of NeoPixels connected
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num_pixels = 30
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pixels = neopixel.NeoPixel(pixel_pin, num_pixels, auto_write=False)
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# Set to 0-1 to change the brightness of the NeoPixels
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pixels.brightness = 0.2
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def blink(color, wait):
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"""Blink animation. Blinks all pixels."""
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pixels.fill(color)
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pixels.show()
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time.sleep(wait)
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pixels.fill((0, 0, 0))
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pixels.show()
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time.sleep(wait)
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def chase(color, spacing=3, iteration_step=1):
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"""Theatre chase animation. Chases across all pixels."""
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if spacing < 2:
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raise ValueError("Spacing must be greater than 1 to show chase pattern.")
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# Use modulo division to create the spacing between pixels.
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chase_pixel = iteration_step % spacing
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# Loop over pixels and turn on expected pixels to provided color.
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for pixel in range(0, len(pixels), spacing):
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# If the pixel is outside the total pixel range, break.
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if pixel + chase_pixel > len(pixels) - 1:
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break
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pixels[pixel + chase_pixel] = color
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pixels.show()
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# Loop over pixels and turn off expected pixels.
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for pixel in range(0, len(pixels), spacing):
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# If the pixel is outside the total pixel range, break.
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if pixel + chase_pixel > len(pixels) - 1:
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break
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pixels[pixel + chase_pixel] = (0, 0, 0)
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def color_wipe(color, wait):
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"""Color wipe animation. Wipes across all pixels."""
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for pixel in range(num_pixels):
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pixels[pixel] = color
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time.sleep(wait)
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pixels.show()
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time.sleep(0.5)
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def rainbow_cycle(wait):
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"""Rainbow cycle animation. Cycles across all pixels."""
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for color_index in range(255):
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for pixel in range(num_pixels):
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pixel_index = (pixel * 256 // num_pixels) + color_index
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pixels[pixel] = colorwheel(pixel_index & 255)
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pixels.show()
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time.sleep(wait)
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RED = (255, 0, 0)
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YELLOW = (255, 150, 0)
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GREEN = (0, 255, 0)
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CYAN = (0, 255, 255)
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BLUE = (0, 0, 255)
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PURPLE = (180, 0, 255)
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while True:
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# Blink 5 times. Increase or decrease the range for more or less blinking.
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for blinks in range(5):
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blink(RED, 0.5) # Increase number to slow down blinking, decrease to speed up.
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# Chase. Increase or decrease the range for longer or shorter chase animation.
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for step in range(50):
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chase(PURPLE, spacing=4, iteration_step=step)
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time.sleep(0.05)
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# Fill all pixels.
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pixels.fill(RED)
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pixels.show()
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# Increase or decrease the time to change the speed of the solid color change in seconds.
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time.sleep(0.5)
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pixels.fill(GREEN)
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pixels.show()
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time.sleep(0.5)
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pixels.fill(BLUE)
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pixels.show()
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time.sleep(0.5)
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# Color wipe.
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color_wipe(YELLOW, 0.01) # Increase the number to slow down the color chase.
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color_wipe(CYAN, 0.01)
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color_wipe(PURPLE, 0.01)
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# Rainbow cycle.
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rainbow_cycle(0) # Increase the number to slow down the rainbow.
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