The sketch takes input from a potentiometer and produces a fair LED fade, using the CIE1931 perceived lightness formula. Additionally, ... The wiper of the 10K potentiometer is wired to A0 of Arduino ...

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 ...