We set the potentiometer pin as 0 (A0 on the Arduino Uno board), the CONTROL variable is the voltage that is used to cotrol the led brightness of the speed of the fan. In the setup() function the ...

About a year ago I paid about EUR 20 for a WDD35 potentiometer with a linearity of 0.5%. It looks quite beautiful on the inside, with ball bearings and conductive plastic track which is milled to ...