Main characteristics of electric plastic potentiometer sensors

　　(1) When selecting a potentiometer, the resistor material, structure, type, specification and adjustment mode of the potentiometer should be selected according to the specific requirements of the application circuit. For example, power type wire-wound potentiometer is used for high-power circuit; Precision instruments and other circuits should use high-precision wire-wound potentiometer, precision multi-turn potentiometer or main characteristics, the use of metal glass glaze potentiometer; Medium and high frequency circuit can choose carbon film potentiometer; The volume adjustment and power switch of the semiconductor radio can choose a small carbon film potentiometer with a rotary switch; The volume control of stereo audio amplifier can choose double coaxial potentiometer; The tone control of the sound system can choose the direct sliding potentiometer; The reference voltage regulation of the power supply circuit should choose the fine tuning potentiometer; The potentiometer used in communication equipment and computers can be a chip type multi-turn potentiometer or a single-turn potentiometer.

　　(2) Reasonable selection of potentiometer electrical parameters according to the requirements of the equipment and circuit to select the type and specifications of the potentiometer after the main characteristics, selection, but also according to the requirements of the circuit reasonable selection of potentiometer electrical parameters, including rated power, nominal resistance, allowable deviation, resolution, the highest operating voltage, dynamic noise, etc.

　　(3) According to the law of resistance value changes in the selection of potentiometers in various power supply circuits voltage regulation, amplifier circuit operating point regulation, sub-brightness regulation and line, field scanning signal regulation with potentiometers, should use linear potentiometers. Conductive plastic potentiometer, the main characteristics of the tone control potentiometer in audio equipment should be used to reverse logarithmic (formerly called exponential) potentiometer, volume control potentiometer can be used to logarithmic potentiometer.

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