from machine import Pin
from machine import PWM
from time import sleep 

pwm_pin = Pin(23,Pin.OUT)
pwm = PWM(pwm_pin)
pwm.freq(500)

while True:
    #max 1023
    pwm_value = 1023
    pwmOut = int(pwm_value)
    pwm.duty(pwmOut)
    print('PWM Value = ',pwmOut)
    sleep(100)

    #if 1 cycle, 1024 = 2msec
    # 1 = 2msec / 1024
    #24 = (2msec/ 1024) * 24
    #1024 - 2 => (2msec / 1024) * 1000

    sec = ((1/pwm_hz / 1024) * pwm_value)