A potentiometer is a variable resistor. It is the electromechanical part of a control knob. It is a means to adjust the amount of voltage being supplied to an element. It is made of a resistive material (ex. Graphite) or a conductive one (ex. Kapton), and the setting of the wiper determines the amount of that material the electricity must pass.
Typical Type (passive)
Trim Type
Slide Type (resistive)
Membrane Type (conductive)
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