3. Potentiometers

3.1 General

A potentiometer is a variable resistor with three outputs: two are connected to the ends a and c of the resistive element, the third b is connected to a slider whose movement on the resistive element is ensured by a mechanical control, most often consisting of :

• a knob with a slot for screwdriver drive;

• an axle passing through a barrel for mounting on a chassis;

• a control tongue that can be operated longitudinally.