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73 lines
2.6 KiB
73 lines
2.6 KiB
# Based on NeoPixel library and strandtest example by Tony DiCola (tony@tonydicola.com)
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# To be used with a 12x1 NeoPixel LED stripe.
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# Place the LEDs in a circle an watch the time go by ...
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# red = hours
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# blue = minutes 1-5
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# green = seconds
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# (To run the program permanently and with autostart use systemd.)
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import time
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import datetime
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import math
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from neopixel import *
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# LED strip configuration:
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LED_COUNT = 12 # Number of LED pixels.
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LED_PIN = 18 # GPIO pin connected to the pixels (must support PWM!).
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LED_FREQ_HZ = 800000 # LED signal frequency in hertz (usually 800khz)
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LED_DMA = 10 # DMA channel to use for generating signal (try 10)
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LED_BRIGHTNESS = 255 # Set to 0 for darkest and 255 for brightest
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# True to invert the signal (when using NPN transistor level shift)
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LED_INVERT = False
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# Main program logic follows:
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if __name__ == '__main__':
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# Create NeoPixel object with appropriate configuration.
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strip = Adafruit_NeoPixel(
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LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS)
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# Intialize the library (must be called once before other functions).
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strip.begin()
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for i in range(0, strip.numPixels(), 1):
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strip.setPixelColor(i, Color(0, 0, 0))
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while True:
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now = datetime.datetime.now()
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# Low light during 19-8 o'clock
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if(8 < now.hour < 19):
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strip.setBrightness(200)
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else:
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strip.setBrightness(25)
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hour = now.hour % 12
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minute = now.minute / 5
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second = now.second / 5
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secondmodulo = now.second % 5
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timeslot_in_microseconds = secondmodulo * 1000000 + now.microsecond
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for i in range(0, strip.numPixels(), 1):
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secondplusone = second + 1 if(second < 11) else 0
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secondminusone = second - 1 if(second > 0) else 11
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colorarray = [0, 0, 0]
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if i == second:
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if timeslot_in_microseconds < 2500000:
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colorarray[0] = int(
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0.0000508 * timeslot_in_microseconds) + 126
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else:
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colorarray[0] = 382 - \
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int(0.0000508 * timeslot_in_microseconds)
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if i == secondplusone:
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colorarray[0] = int(0.0000256 * timeslot_in_microseconds)
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if i == secondminusone:
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colorarray[0] = int(
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0.0000256 * timeslot_in_microseconds) * -1 + 128
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if i == minute:
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colorarray[2] = 200
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if i == hour:
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colorarray[1] = 200
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strip.setPixelColor(
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i, Color(colorarray[0], colorarray[1], colorarray[2]))
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strip.show()
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time.sleep(0.1)
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