clock.py

#!/usr/bin/env python3

# This is a digital clock for the unicorn hat mini from Pimoroni
# There is an updated version available here: https://github.com/yglodt/unicornhatmini-clock

import time, datetime
from unicornhatmini import UnicornHATMini
from random import randrange

unicornhatmini = UnicornHATMini()
unicornhatmini.set_brightness(0.1)

red = 0
green = 0
blue = 0

numbers = {
        "0" : [ [1,0], [0,1], [0,2], [0,3], [0,4], [0,5], [1,6], [2,5], [2,4], [2,3], [2,2], [2,1] ],
        "1" : [ [0,1], [1,0], [1,1], [1,2], [1,3], [1,4], [1,5], [1,6], [0,6], [2,6] ],
        "2" : [ [0,1], [1,0], [2,1], [2,2], [1,3], [0,4], [0,5], [0,6], [1,6], [2,6] ],
        "3" : [ [0,1], [1,0], [2,1], [2,2], [1,3], [2,4], [2,5], [1,6], [0,5] ],
        "4" : [ [0,0], [0,1], [0,2], [0,3], [1,3], [2,3], [2,0], [2,1], [2,2], [2,3], [2,4], [2,5], [2,6] ],
        "5" : [ [1,0], [2,0], [0,0], [0,1], [0,2], [0,6], [1,6], [2,5], [2,4], [1,3] ],
        "6" : [ [2,0], [1,0], [0,0], [0,1], [0,2], [0,3], [0,4], [0,5], [0,6], [1,6], [2,6], [2,5], [2,4], [2,3], [1,3 ] ],
        "7" : [ [0,0], [1,0], [2,0], [2,1], [2,2], [2,3], [1,4], [1,5], [1,6] ],
        "8" : [ [1,0], [0,1], [2,1], [0,2], [2,2], [1,3], [0,4], [2,4], [0,5], [2,5], [1,6] ],
        "9" : [ [0,0], [0,1], [0,2], [0,3], [1,3], [1,0], [2,0], [2,1], [2,2], [2,3], [2,4], [2,5], [2,6], [1,6], [0,6] ],
        ":" : [ [1,2], [1,4]]
}

def letter(char, offset):
        for pixel in numbers[char]:
                x = pixel[0] + offset
                y = pixel[1]
                unicornhatmini.set_pixel(x, y, red, green, blue)
dotson = True
previousMinute = -1
while True:
        unicornhatmini.clear()
        now = datetime.datetime.now()
        nows = now.strftime("%H%M")
        if now.minute != previousMinute:
                red = randrange(256)
                green = randrange(256)
                blue = randrange(256)
        letter(nows[0], 0)
        letter(nows[1], 4)
        if dotson == True:
                letter(":", 7)
        letter(nows[2], 10)
        letter(nows[3], 14)
        unicornhatmini.show()
        dotson = not dotson
        previousMinute = now.minute
        time.sleep(0.5)