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Soundwell Electronic Products (Guangdong) Co., Ltd.
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Soundwell Electronic Products (Guangdong) Co., Ltd.

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Selection potential Cautions

Article Source:m.888336.cn  Edit:Soundwell  issuing time:2015-11-30

  You can from the following four points to consider when selecting potentiometer:
  Select a potentiometer precautions, pay attention to the structural requirements
  Selected potentiometer, pay attention to the size of the potentiometer size, and whether the length of the shaft shank style, and the need to lock the shaft position switch, multi-joint or single joint, lap or more rings, for structural concrete Claim.
  The need for frequent adjustment potentiometer, you should select shaft milled plane potentiometer for mounting knob. That do not require frequent adjustment potentiometer, optional grooved shaft potentiometers in order to use a screwdriver to adjust the rear is no longer rotated to maintain a relatively stable working condition. Once the requirements for accurate and potentiometers After no change should be selected potentiometer with locking device.
  Select potentiometer Note II will change depending on the application characteristics of resistance
  Potentiometer resistance change characteristics should be selected depending on the application. For example, the volume control potentiometer should be preferred index potentiometer, usable linear potentiometer instead of in the absence of exponential potentiometer situation, but can not use logarithmic potentiometer, otherwise it will make the volume word section range of smaller: for partial pressure should be used with potentiometers linear potentiometer; for tone control potentiometer should be used logarithmic potentiometer.
  Selection potential Cautions Third, according to requirements to select the type of potentiometer
  In general less demanding circuit, or the use of better environmental situation, we should first use synthetic carbon potentiometer. Synthesis of carbon potentiometer with a high resolution, wide resistance range, complete model species, inexpensive features, but have poor moisture resistance and stable member of the shortcomings can be widely used in indoor working household appliances. For example, transistor radios with the volume potentiometer with a switch, you can use synthetic carbon potentiometer; TV in power conditioning circuitry can be used sliding straight carbon potentiometer; other household appliances in the high load and trim potentiometer can be use synthetic carbon potentiometer. Further long mechanical life synthetic carbon potentiometer, you can use the require long wear life circuits.
  If the circuit needs to be precisely adjusted, and power consumption is large. Wirewound potentiometers should be used. Wirewound potentiometers larger due to the distribution parameters apply only to low-frequency circuits, high-frequency circuits should not use wirewound potentiometers. In addition, wirewound potentiometer noise, low noise requirements of the circuit can choose one of these potentiometers.
  Select potentiometer precautions Fourth, according to the requirements of the potentiometer circuit selection parameters
  The main parameters of the potentiometer nominal resistance, power rating, maximum operating voltage, linear accuracy and mechanical life, etc., which are the basis for selection of the potentiometer. When you select potentiometer type according to the requirement, it must choose the technical and performance parameters in accordance with the requirements of the potentiometer circuit.
  Different potential mechanical life is not the same, the general synthetic carbon potentiometer mechanical longest, up to 200,000 weeks, while the glass glaze potential mechanical life of only 100-200 exam week. Selected potentiometer, the circuit should be based on the different requirements for wear resistance, use different mechanical life potentiometer parameters.

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