Potentiometer

Description

A potentiometer is a resistor that can be mechanically changed. Typically form factors are knobs (turn to change) or sliders. The change of resistance is either linear (resistance changes linear with the angle or distance) or logarithmic.

Potentiometer

Slider

How to connect it electrically

How to control it in MicroPython

from machine import Pin, ADC
from time import sleep
pot = ADC(Pin(34))
pot.atten(ADC.ATTN_11DB)
while True:
  pot_value = pot.read()
  print(pot_value)
  sleep(0.5)

Here the voltage of Pin 34 is manipulable with the poti:

Schematic drawing: