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potentiometer - A variable resistor with three terhree terminals. Mechanical turning of a shaft can be used to produce variable resistance and potential. Example: A volume control is usually a potentiometer.

Types
Resistor Types Metal Film - Work from a thin film of metal or particles of metal are used to achieve different resistances. Carbon Film - A thin film of carbon is laid upon a rod of cer
electronics-for-beginners.com/pages/page/2060/


Drawing Circuits
Drawing Circuits When designing circuits it is not practical to draw physical likenesses of the components you wish to use. In place of each component a symbol is use to represent it. For example:
electronics-for-beginners.com/pages/page/1070/