Let's read an analog signal!

For this, we'll use a small 10k trim pot to set up a voltage divider. Here's the wiring diagram:

And here's the code:

import time
import board
from analogio import AnalogIn

knob = AnalogIn(board.G1)

def get_voltage(raw):
    return (raw * 3.3) / 65536

while True:
    raw = knob.value
    volts = get_voltage(raw)
    print("raw = {:5d} volts = {:5.2f}".format(raw, volts))
    time.sleep(0.5)

import time
import board
from analogio import AnalogIn

knob = AnalogIn(board.G1)

def get_voltage(raw):
    return (raw * 3.3) / 65536

while True:
    raw = knob.value
    volts = get_voltage(raw)
    print("raw = {:5d} volts = {:5.2f}".format(raw, volts))
    time.sleep(0.5)

Save that as something like adc.py and then run it with:

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