personal menorah project

Author: ladyada

WS2801_LED_Menorah/code.py

@@ -0,0 +1,71 @@
+# SPDX-FileCopyrightText: 2021 Liz Clark for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+"""Jack-o'-Lantern flame example Adafruit Circuit Playground Express"""
+import time
+import math
+import random
+import board
+import adafruit_ws2801
+from digitalio import DigitalInOut, Direction, Pull
+
+#  button setup
+button = DigitalInOut(board.A2)
+button.direction = Direction.INPUT
+button.pull = Pull.UP
+
+# pixel setup
+pixel_num = 9
+pixel_offset = 2
+pixels = adafruit_ws2801.WS2801(board.SDA1, board.SCL1, pixel_num+pixel_offset, brightness=1, auto_write=False)
+
+pixel_prev = [128] * len(pixels)
+
+lit_candles = None
+night = 1
+
+def split(first, second, offset):
+    """
+    Subdivide a brightness range, introducing a random offset in middle,
+    then call recursively with smaller offsets along the way.
+    @param1 first:  Initial brightness value.
+    @param1 second: Ending brightness value.
+    @param1 offset: Midpoint offset range is +/- this amount max.
+    """
+    if offset != 0:
+        mid = ((first + second + 1) / 2 + random.randint(-offset, offset))
+        offset = int(offset / 2)
+        split(first, mid, offset)
+        split(mid, second, offset)
+    else:
+        level = math.pow(first / 255.0, 2.7) * 255.0 + 0.5
+        return level
+
+while True:
+    if not button.value:
+        while not button.value:
+            time.sleep(0.01) # debounce
+        night += 1 # next night
+        if night == 9: # wrap around
+            night = 1
+        lit_candles = None # reset the lights
+    if not lit_candles:
+        print("Current night: ", night)
+        lit_candles = [True] * night + [False] * (8-night)
+        lit_candles.insert(4, True) # shamash always on
+        print(lit_candles)
+
+    # animate candles
+    for p in range(len(pixels)-pixel_offset):
+        if not lit_candles[p]:
+            pixels[p+pixel_offset] = 0
+            continue
+        if p == 4:
+            level = random.randint(128, 255)
+        else:
+            level = random.randint(64, 191)
+
+        color = split(pixel_prev[p], level, 32)
+        pixels[p+pixel_offset] = ((int(level), int(level / 8), int(level / 48)))
+        pixel_prev[p] = level
+    pixels.show()