EVA-JQLR15B14

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Slide Potentiometers

Slide potentiometers are widely used in commercial and professional applications to control and measure the changing values of voltage or resistance in electrical or electronic circuits. The EVA-JQLR15B14 Slide Potentiometer is one such commonly used device.

Application Field

The EVA-JQLR15B14 Slide Potentiometer has multiple applications including audio level control, volume control, manually adjusted illumination level processes such as dimming, optical image control, and variable frequency control.

Working Principle

The EVA-JQLR15B14 Slide Potentiometer consists of four main parts: the housing support structure, the conducting element, the contactor, and the moving portion.

The housing anchors the conductive element and the contactor. The conducting element is a resistive material such as carbon-based contact path, which limits or modifies electrical currents or voltages. It can be seen from the figure that the contactor has three pins and is connected to the conducting path. When the potentiometer is activated (by sliding the contactors across the conducting elements), a certain amount of voltage is released from the contacts and a certain amount of electrical current goes through the conducting element.

The moving portion consists of a movable contactor that is secured to the housing with a screw. The contactor slides along the conducting element and controls its position by its own weight. This ensures an even resistance that is proportional to the length of the conducting element. When the contactor reaches the end of the conducting path, the other side of the resistor connects the other side of the voltage output and closes the circuit.

In summary, the operation of a slide potentiometer is fairly simple: It consists of a conducting element, a contactor, and a movable contactor. The contactor/movable contactor combination creates a sliding effect as it slides along the contact path, allowing a certain amount of voltage to flow through the element and thus creating a certain resistance level. The length of the conductive element determines the amount of resistance.

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