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Potentiometer | Electronics Lab

Version 1 - Last update: Oct 5, 2015

Variable resistor - demonstration of variable voltage divider circuit.

When it is connected with 5 volts across its two outer pins, the middle pin outputs a voltage between 0 & 5, depending on the position of the knob on the potentiometer. The voltage is divided proportionate to the resistance between the middle pin and the ground pin. This will help control the brightness of an LED.

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