1  # SPDX-FileCopyrightText: 2021 Erin St Blaine for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: MIT
 4  
 5  """
 6  Fluttering Fairy Wings
 7  Adafruit invests time and resources providing this open source code.
 8  Please support Adafruit and open source hardware by purchasing
 9  products from Adafruit!
10  Written by Erin St Blaine for Adafruit Industries
11  Copyright (c) 2020-2021 Adafruit Industries
12  Licensed under the MIT license.
13  All text above must be included in any redistribution.
14  """
15  
16  import time
17  import random
18  import board
19  from analogio import AnalogIn
20  from adafruit_servokit import ServoKit
21  
22  analog_in = AnalogIn(board.A0)
23  kit = ServoKit(channels=8)
24  
25  SERVO_MIN = 0
26  SERVO_MAX = 130
27  DELAY_MIN = 0.01  # In seconds, is the longest DELAY between servo moves
28  DELAY_MAX = 0.1   # In seconds, is the longest DELAY between servo moves
29  
30  DELAY = DELAY_MAX
31  
32  def set_delay():
33      '''calibrate to potentiometer'''
34      global DELAY # pylint: disable=global-statement
35      DELAY = DELAY_MIN + DELAY_MAX * (65535 - analog_in.value) / 65535
36      #print(DELAY\
37  
38  while True:
39      num_flaps = random.randint(1, 4)
40  
41      print("Flapping", num_flaps, "times")
42      for flap in range(num_flaps):
43          print("Open")
44          set_delay()
45          for angle in range(SERVO_MIN, SERVO_MAX, 2): # move 2 deg at a time
46              kit.servo[0].angle = angle
47              kit.servo[1].angle = SERVO_MAX-angle
48              time.sleep(DELAY)
49          print("Close")
50          set_delay()
51          for angle in range(SERVO_MIN, SERVO_MAX, 2): # move 2 deg at a time
52              kit.servo[0].angle = SERVO_MAX-angle
53              kit.servo[1].angle = angle
54              time.sleep(DELAY*2)
55      print("Waiting...")
56      time.sleep(random.randint(2, 10))  # wait 2 to 10 seconds