Analog Read Serial
The analog input is read and the result is printed in the Serial Monitor. The graphical representation of the result can be found using Serial Plotter (Main Menu> Tools > Serial Plotter).
When the shaft is turned all the way in one direction, there are 0 volts going to the pin, and the input value is 0. When the shaft is turned all the way in the opposite direction, there are 5 volts going to the pin and the input value is 1023. In between, analogRead() returns a number between 0 and 1023 that is proportional to the amount of voltage being applied to the pin.