An adjustable potentiometer can open up many interesting user interfaces. With this rotary potentiometer just turn the dial and the resistance changes.
Connect VCC to an outer pin, GND to the other, and the center pin will have a voltage that varies from 0 to VCC depending on the rotation of the pot
Features:
250K Ohm Single Linear Taper Rotary Potentiometers
250K Ohm, 3 Terminals
Top adjustment type and knurled shaft for easy operation in daily use time.
Mainly used to control electrical devices such as volume controls on audio equipment.