Add Music Box code in CircuitPython

Author: TheKitty

Crickits/Music_Box_with_Crickit/code.py

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+# SPDX-FileCopyrightText: 2019 Dano Wall for Adafruit Industries
+# SPDX-FileCopyrightText: 2019 Anne Barela for Adafruit Industries
+# SPDX-FileCopyrightText: 2019 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+# Music Box code in CircuitPython - Dano Wall and Anne Barela
+# Revised by Ladyada 2019-01-16
+
+from adafruit_crickit import crickit
+from analogio import AnalogIn
+from rainbowio import colorwheel
+import neopixel
+import audioio
+import audiocore
+import board
+
+AUDIO_FILENAME = 'fur-elise.wav'
+
+# Audio output
+cpx_audio = audioio.AudioOut(board.A0)
+audio = audiocore.WaveFile(open(AUDIO_FILENAME, "rb"))
+
+# Rotating dancer
+dancer = crickit.servo_2
+dancer.angle = 0
+MAX_SERVO_ANGLE = 160
+move_direction = 1
+
+# neopixels!
+pixels = neopixel.NeoPixel(board.NEOPIXEL, 10, brightness=1)
+pixels.fill((0, 0, 0))
+
+# light sensor
+light = AnalogIn(board.LIGHT)
+
+
+def rainbow(value):
+    for i in range(10):
+        pixels[i] = colorwheel((value * i) & 255)
+
+
+while True:
+    # turn off LEDs so we can tell if its dark out!
+    pixels.brightness = 0
+    # read light level
+    light_level = light.value
+    # turn LEDs back on
+    pixels.brightness = 1
+
+    # Turn things off if light level < value, its dark
+    if light_level < 2000:
+        pixels.fill((0, 0, 0))
+        cpx_audio.stop()
+    else:
+        if not cpx_audio.playing:
+            # Start playing the song again
+            cpx_audio.play(audio)
+        # calculate servo rotation
+        if dancer.angle <= 0:
+            move_direction = 1
+        if dancer.angle > MAX_SERVO_ANGLE:
+            move_direction = -1
+        # Move servo one degree forward or backward.
+        rainbow(int(dancer.angle * 255/MAX_SERVO_ANGLE))
+        dancer.angle += move_direction