RES1R0E

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

A rotary potentiometer, sometimes simply called a potentiometer, is a type of resistor used to finely adjust the output voltage of a power source. A potentiometer is a three-terminal variable resistor with a rotary movement that allows the resistance value to be adjusted. A rotary rheostat is a three-terminal variable resistor with a rotary movement that allows the current through a circuit to be adjusted.

The working principle of a rotary potentiometer is fairly straightforward. When the rotary contact knob is rotated, it moves along a resistive track. As the contact knob moves, it changes the resistance value in the circuit. The position of the contact knob determines the resistance value and thus the voltage output by the potentiometer. Generally, when the contact knob is rotated clockwise, the resistance becomes smaller, thus increasing the voltage output.

On the other hand, the working principle of a rotary rheostat is a bit more complicated. A rotary rheostat utilizes a tungsten bar that is connected to a wiper arm. As the contact knob is rotated, the tungsten bar moves along a resistive track. As the tungsten bar moves along the resistive track, the width of its contact area with the resistive track is adjusted. This in turn changes the resistance value in the circuit, allowing for current adjustment.

Rotary potentiometers and rheostats can be found in a variety of electrical and electronic applications. Potentiometers are commonly used as volume and tone controls in audio systems. They are also widely used in testing and measurement instruments, where they are used to adjust the gain or offset of a signal. Rheostats, on the other hand, are used to control the flow of electrical current in a circuit when the voltage is at a constant level. For example, they can be used to reduce the speed of a motor in industrial control loops.

Due to their simplicity, reliability and relatively low cost, rotary potentiometers and rheostats are still commonly used in a wide range of applications. They offer excellent accuracy and repeatability when adjusted to the correct resistance values and are ideal for applications where precise and consistent values are required.

The specific data is subject to PDF, and the above content is for reference