EVN-DJAA03B54 Potentiometers, Variable Resistors

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Trimmer Potentiometers come in many different sizes and from various manufacturers.  EVN-DJAA03B54 is one such device from Eversun. This trimmer potentiometer is a three- terminal device typically available with resistance values ranging from 100 to 1M Ohms and a tolerances of 10%. It is offered in a 7.4 mm (0.294 inch) square package.

Application field

EVN-DJAA03B54 trimmer potentiometers are used in a variety of applications, ranging from radio and television receivers to automotive and telecommunication systems. It is mainly used to adjust the output voltage level, gain control, and tone control. In addition, this device can be used in other applications, such as electronic toys, tracking systems, and industrial sensors.

Working Principle

The working principle of the EVN-DJAA03B54 trimmer potentiometer involves changes to the resistance by turning a shaft that is connected to the middle terminal of the device. Turning the shaft increases or decreases the distance between the inner wiper and the end of the track, thereby changing the resistance. The resistance between the outer terminals remains constant, but the resistance between the wiper and either outer terminal varies depending on the position of the rod. The wiper can assume a position between the minimum and maximum resistance, forming a true non-linear resistance.

When turned clockwise, the resistance value increases between the wiper and the inner terminal, while the resistance between the wiper and the outer terminal decreases. The changes in resistance depend on the number of turning steps per turn of the shaft for the selected model of the device. On the other hand, when the shaft is turned counterclockwise, the resistance value decreases between the wiper and the inner terminal and increases between the wiper and the outer terminal.

The resistance measurement of EVN-DJAA03B54 trimmer potentiometers is taken between the inner terminal and either the external terminals, with the wiper in the center. A differential voltage measurement between the wiper and the outer terminals can also be taken. The resolution of the device depends on the number of steps in each turn of the shaft.

Overall, the EVN-DJAA03B54 trimmer potentiometer is a well-designed, versatile device that can be used in a variety of applications. Its three-terminal design allows for easy, precise resistance adjustment using a rotating shaft. This device is available in a wide range of resistance values and tolerances, which makes it particularly suitable for applications where precise adjustment is required.

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