import board
import time
from analogio import AnalogIn
from analogio import AnalogOut

analog_in = AnalogIn(board.A1)
analog_out = AnalogOut(board.A0)

def get_voltage(pin):
    return (pin.value * 3.3) / 65536

while True:
    print((get_voltage(analog_in),))
    analog_out.value = get_voltage(analog_in)
    time.sleep(1)