1  # SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
 2  # SPDX-License-Identifier: MIT
 3  """
 4  NeoSlider NeoPixel Rainbow Demo
 5  """
 6  import board
 7  from rainbowio import colorwheel
 8  from adafruit_seesaw.seesaw import Seesaw
 9  from adafruit_seesaw.analoginput import AnalogInput
10  from adafruit_seesaw import neopixel
11  
12  # NeoSlider Setup
13  neoslider = Seesaw(board.I2C(), 0x30)
14  potentiometer = AnalogInput(neoslider, 18)
15  pixels = neopixel.NeoPixel(neoslider, 14, 4, pixel_order=neopixel.GRB)
16  
17  
18  def potentiometer_to_color(value):
19      """Scale the potentiometer values (0-1023) to the colorwheel values (0-255)."""
20      return value / 1023 * 255
21  
22  
23  while True:
24      print(potentiometer.value)
25      # Fill the pixels a color based on the position of the potentiometer.
26      pixels.fill(colorwheel(potentiometer_to_color(potentiometer.value)))