adc.py

rpi-pico-w/upython/adc.py: analog-to-digital converter.

The program continuously prints to the USB the value of the ADC on GPIO 26 once every 0.2 seconds.

The onboard LED is blinked as a heartbeat.

The hello world is with a potentiometer: extremes on GND and VCC pins of the Pi, and middle output on pin GIO26, then as you turn the knob, the uart value goes from about 0 to about 64k.

The 0 side is quite noisy and varies between 0 and 300 for some reason.

In Ciro's ASCII art circuit diagram notation:

RPI_PICO_W__gnd__gpio26Adc__3.3V@36
            |    |          |
            |    |          |
            |  +-+          |
            |  |            |
            |  |  +---------+ 
            |  |  |
         P__1__2__3

rpi-pico-w/upython/adc.py

from machine import ADC, Pin
from time import sleep

led = Pin('LED', Pin.OUT)
adc = ADC(Pin(26))

while True:
    print(adc.read_u16())
    led.toggle()
    sleep(0.2)

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Raspberry Pi Pico W MicroPython example
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