Basic structure: generally composed of resistance body, sliding contact (brush) and three outgoing terminals (two fixed terminals and one sliding terminal).
Core principle: moving the sliding contact on the resistor body changes the ratio of the resistance value from the sliding end to the two fixed ends.
Main functions:
Used as a voltage divider (most classic application): output a voltage signal proportional to the mechanical position.
Used as a variable resistor: by connecting two pins, it acts as an element with adjustable resistance value.
Used as sensor: convert mechanical displacement (such as angle and linear displacement) into electrical signal.
