EVM-3WSX80B15

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Trimmer Potentiometers

The EVM-3WSX80B15 is a trimmer potentiometer, commonly known as a trimpot, which is a small adjustable variable resistor. A trimmer potentiometer is a three-terminal device, usually constructed with a ceramic body, which contains a resistive track that can be set to any desired value, or adjusted, as required. It is typically used in wattmeters, power supplies, impedance tuning, radio transmitters, radio receivers, and other electronic equipment for adjustment of bias, gain, and other operating parameters.

Application Field

The application fields of trimmer potentiometers have a wide range and continue to expand. Most commonly trimmer potentiometers are used to adjust the output of instruments such as wattmeters, power supplies, and as mentioned above, radio transmitters and radio receivers. Many other electrical and electronic equipment, products, and devices also come equipped with trimmer potentiometers for precise and reliable performance.

Trimmer potentiometers can also be used for applications such as voltage regulation, power regulation, signal conditioning, fault protection, signal calibration, current limiting, and countless other electrical and electronics applications. In addition to being used in most commercial and consumer electronic products, trimmer potentiometers are also used in aerospace, robotics, and industrial automation. In some cases, trimmer potentiometers can also be used to provide digital control or set-point regulation.

Working Principle

The principles by which a trimmer potentiometer works are relatively simple. It consists of a circular resistive element. A movable contact, called the wiper, slides along the resistive element to adjust the resistance, which can be increased or decreased depending on the direction of movement. As such, the trimmer potentiometer is used to fine-tune an electrical system by varying its resistance.

Trimmer potentiometers are active components, which means that when the resistance is adjusted, the level of voltage is also adjusted in the circuit. This is made possible due to the fact that there is a voltage applied along the resistive element when a current passes through it, and the voltage at the point of contact (the wiper) is equal to the voltage at any other point along the resistor. Therefore, trimmer potentiometers are able to adjust the output voltage simply by changing the resistance at different points.

In summary, trimmer potentiometers are extremely versatile tools that have found their way into most electronic products and are widely used for precise adjustments in audio and instrument conditioning, radio control, voltage and current regulation, and numerous other applications.

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