Variable resistors also referred to as potentiometers and exhibit features such as linear or logarithmic track made of carbon or other conducting materials, has two or three terminals and are identified by maximum resistance and size. Variable resistors find application either as rheostats or potentiometers depending on the number of terminals. Here are links to different manufacturers as well as dealers for different types of the variable resistors which will all be a perfect fit to the application that they are put to via control of current.
