QT Py Analog Input pin reading voltage even when nothing is connected

[levgrav]

I have nothing connected to the QT Py except for the USB C cable and I am reading the pin value for A3 and it gives me a reading that fluctuates between around 25000 and 32000 and that does not make sense to me. Is this normal?

Here is my code:

import board
import time
from analogio import AnalogIn

therm = AnalogIn(board.A3)

while True:
    v = therm.value
    print(v)
    time.sleep(0.1)

[dhalbert]

You are reading electrical noise on the pin because it's unconnected.