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3386 Single Turn Variable Potentiometer Trimmer Resistor is a high accuracy variable resistor. However Variable Potentiometer Trimmer Resistor, PCB mountable with 3 terminal pins. However the voltage between the terminal varies as the trimpot is rotate.
Hence the Variable resistors are use for variating voltage as per the need in a circuit. Although the outer two pins are connect to Vcc and 0V, and centre pin outputs a variable voltage between 0 v and Vcc as the rotary cermet is rotate.
1 x3386 Single Turn Variable Potentiometer Trimmer Resistor