'''

Voltaat Learn (http://learn.voltaat.com)

Link to the full tutorial:

Tutorial: How to Use a potentiometer with the Raspberry Pi Pico.

This code controls the brightness of a white lamp using a variable resistor.

Note: You can use this sketch with any Raspberry Pi Pico.

'''

from machine import Pin, PWM, ADC

import time

# Initialize pin 16 as PWM output to control LED brightness

led = PWM(Pin(16))

led.freq(1000)  # Set PWM signal frequency

# Initialize pin 26 as ADC input to read the variable resistor value

pot = ADC(Pin(26))

while True:

   # Read the value from the potentiometer (0 - 65535)

   pot_value = pot.read_u16()

   # Send the value directly to the LED to control brightness (0 - 65535)

   led.duty_u16(pot_value)

   # Small delay to reduce update speed

   time.sleep(0.01)

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