from machine import Pin,PWM
import time

DC_val = 0
pwm_signal = PWM(Pin(2), freq=5000, duty_u16 = DC_val)

while True:
    for DC_val in range(0,pow(2,16)-1,50):
        pwm_signal.duty_u16(DC_val)
        time.sleep(0.01)
        print(f'Average Voltage = {DC_val * 10 / (pow(2,16)*3.3)}')
    for DC_val in range(pow(2,16)-1,0,-50):
        pwm_signal.duty_u16(DC_val)
        time.sleep(0.01)
        print(f'Average Voltage = {DC_val * 10 / (pow(2,16)*3.3)}')