# L6d.py -Program utilizare PWM pentru
#  control intensitate luminoasa LED.

from  machine import Pin, PWM  
import time     # clasic , eventual utime

pwm = PWM (Pin(13))      # instanta PWM
pwm.freq(50)             # in Hz

while 1:
    for i in range(65000):
        pwm.duty_u16(i)
        time.sleep(0.0001)
        
    for i in range(65000,0,-1):
        pwm.duty_u16(i)
        time.sleep(0.0001)