EVM-EASA00B14 Potentiometers, Variable Resistors

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Introduction

Trimmer Potentiometers are devices used for precise, adjustable current control. They are often found in electronic circuit-based applications such as audio volume controls and motor speed controls. The EVM-EASA00B14 is a type of trimmer potentiometer specifically designed for higher precision control and long-term stability. This article will discuss the application field and working principle of the EVM-EASA00B14.

Application

The EVM-EASA00B14 is ideal for applications that require precise current control with long-term stability. Examples include integrated circuit trimming, product testing, and motor speed control. The device is especially suitable for applications that need the reliability and precision of a manual setting, but without the secondary cost of employing a technician. For motor speed control applications, the EVM-EASA00B14 offers the ability to adjust the speed by altering the resistance in a very small amount. This fine-tuning capability is especially advantageous in motor speed control.

Design

The EVM-EASA00B14 consists of three main components: an electro-mechanical element, an alloy plate, and a kelvin contact.

• The electro-mechanical element is a resistive-capacitive network that undergoes a resistance change as the adjustment screw is rotated. This provides a linear control characteristics and is very precise in manual operations.
• The alloy plate is an electrically-conductive substrate with large surface area. This feature allows for a more stable current flow and reduces resistance to a minimum.
• The kelvin contact is a spring-loaded contact that attaches to the alloy plate. This contact provides a close connection between the alloy plate and the resistor, thus ensuring stability and precision in the current flow.

Working Principle

When the adjustment screw is turned, the electro-mechanical element alters the potential difference across the two ends of the trimmer, thus changing the current that flows through it. The alloy plate also affects the overall current by allowing electrons to flow more easily, which increases the current and reduces the resistance. By finely controlling the current, the EVM-EASA00B14 can be adjusted exactly to the correct setting with minimal effort. Additionally, the kelvin contact ensures that the current is stable and does not fluctuate due to changes in the temperature or other external disturbances.

Conclusion

The EVM-EASA00B14 trimmer potentiometer is a device uniquely designed for precise and stable current control. Its application field is focused on integrated circuit trimming, product testing, and motor speed control. The device consists of three components: an electro-mechanical element, an alloy plate, and a kelvin contact, which ensure that the current is properly regulated. Together, these components allow the EVM-EASA00B14 to provide precision and stability, making it an ideal choice for many applications.

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