A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat.

Helipots

Precision Potentiometers

Trimpots

A trimpot or trimmer potentiometer is a small potentiometer which is used for adjustment, fine tuning and calibration in circuits. When they are used as a variable resistance (wired as a rheostat) they are called preset resistors.

General Potentiometers

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