2021-12-05 19:53:45 +00:00
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# This simple example randomises LED colours and brightness for a subtly sparkly effect.
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import plasma
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from plasma import plasma2040
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import time
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# Random functions! randrange is for picking integers from a range, and uniform is for floats.
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from random import randrange, uniform
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# Set how many LEDs you have
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NUM_LEDS = 50
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# Pick what bits of the colour wheel to use (from 0-360°, try https://www.cssscript.com/demo/hsv-hsl-color-wheel-picker-reinvented/ )
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HUE_START = 180
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HUE_END = 260
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# Set up brightness minimum and maximum (between 0.0 and 1.0)
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BRIGHTNESS_MIN = 0.2
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BRIGHTNESS_MAX = 0.7
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# Set up speed (wait time between updates, in seconds.)
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SPEED = 0.3
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# Pick *one* LED type by uncommenting the relevant line below:
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# APA102 / DotStar™ LEDs
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# led_strip = plasma.APA102(NUM_LEDS, 0, 0, plasma2040.DAT, plasma2040.CLK)
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# WS2812 / NeoPixel™ LEDs
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led_strip = plasma.WS2812(NUM_LEDS, 0, 0, plasma2040.DAT)
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# Start updating the LED strip
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led_strip.start()
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# Light up all the leds random colours and brightnesses from the specified ranges...
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for i in range(NUM_LEDS):
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led_strip.set_hsv(i, randrange(HUE_START, HUE_END) / 360, 1.0, uniform(BRIGHTNESS_MIN, BRIGHTNESS_MAX))
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while True:
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# ...and then update one random pixel at a time to keep things fresh and sparkly.
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# Comment out the lines below if you want static lights.
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led_strip.set_hsv(randrange(0, NUM_LEDS), randrange(HUE_START, HUE_END) / 360, 1.0, uniform(BRIGHTNESS_MIN, BRIGHTNESS_MAX))
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2021-12-05 19:57:38 +00:00
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time.sleep(SPEED)
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