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move_simple_led.py
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move_simple_led.py
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# move_simple_led.py
#
# changes the brightness of an LED over time
import board
import digitalio
import pwmio
import time
from varspeed import Vspeed
MIN = 0
MAX = 65535
# set up the varspeed object
#
# init_position = initial start position
# result = float, int
vs = Vspeed(init_position=MIN, result="int")
# make the output of the function be within the bounds set
vs.set_bounds(lower_bound=MIN, upper_bound=MAX)
# LED setup for most CircuitPython boards:
led = pwmio.PWMOut(board.D2, frequency=5000, duty_cycle=0)
print(f'Paused for 5 seconds at {MIN}...')
# set the servo to a known starting point
led.duty_cycle = MIN
time.sleep(5)
print(f'Moving to {MIN}...')
running = True
while running:
# run a move from the current position
# move(new_position,time_secs of move,steps in move,easing function)
position, running, changed = vs.move(
new_position=MAX, time_secs=5, steps=100, easing="QuadEaseInOut")
if changed:
print(f'Step: {vs.step}, Position: {position}')
led.duty_cycle = int(position)
print(f'Paused for 5 seconds at {position}...')
time.sleep(5)