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= Description =
 
= Description =
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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.
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Text
  
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Potentiometer
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Image(s)
  
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[[File:Poti.PNG|x150px]]
 
  
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Slider
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= How to connect it electrically =
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Text
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[[File:Slider.PNG|x150px]]
 
  
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= How to connect it electrically =
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Image(s)
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[[File:PotiConnection1.png|300px]]
 
  
 
= How to control it in MicroPython =
 
= How to control it in MicroPython =
 
<syntaxhighlight lang="python" line='line'>
 
<syntaxhighlight lang="python" line='line'>
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#ESP32 or ESP8266
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# todo
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from machine import Pin, ADC
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# code goes here
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from time import sleep
 
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pot = ADC(Pin(34))
 
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pot.atten(ADC.ATTN_11DB)
 
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while True:
 
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  pot_value = pot.read()
 
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  print(pot_value)
 
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  sleep(0.5)
 
 
</syntaxhighlight>
 
</syntaxhighlight>
  
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= A small Program in MicroPython =
 
<syntaxhighlight lang="python" line='line'>
 
<syntaxhighlight lang="python" line='line'>
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#Raspberry Pi Pico
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# todo
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from machine import Pin, ADC
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# code goes here
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from time import sleep
 
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pot = ADC(Pin(26))
 
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conversion_factor = 3.3 / (65535)
 
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while True:
 
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  pot_value = pot.read_u16() * conversion_factor
 
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  print(pot_value)
 
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  sleep(0.5)
 
 
</syntaxhighlight>
 
</syntaxhighlight>
  
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text
  
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Here the voltage of Pin 34 (for the ESP) or on Pin GP26 (for the Pico) is manipulable with the poti:
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image(s)
  
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[[File:PotiConnection2.jpg|300px]]
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= Related Tutorial Videos =
  
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<youtube>gjj5KyK2qGI</youtube>
  
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Schematic drawing:
 
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[[File:PotiConnection1.png|300px]]
 
  
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= Related Tutorial Videos =
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= Background =
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text
  
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<youtube>gjj5KyK2qGI</youtube>
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image(s)

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