from time import sleep
from machine import Pin, PWM

led = Pin(1, Pin.OUT)
Button = Pin(28, Pin.IN, Pin.PULL_DOWN)

pwm = PWM(Pin(15)) #from 500000 to 2400000
pwm.freq(50)
pwm.duty_ns(500000)

p = 500000

while True:
    if Button.value() == 1:
        print (p)
        led.value(1)
        pwm.duty_ns(p)
        p = p + 100000
        sleep(0.1)
        led.value(0)