Rotary Potentiometers, Rheostats

The 392JB25K is an ongoing level potentiometer controlled by a rotary knob, which is one of the most common types of electromechanical instruments. It is a kind of passive electronic component, and the working principle is easy to understand. It is widely used because of its simple structure, accurate control and flexible application.

Application Field

The 392JB25K rotary potentiometer is often used in controlling the voltage variator of electronic instruments such as voltage regulator, switching power supply and so on. For example, in motor speed control systems, a potentiometer is used to adjust the speed of the motor; in light intensity adjustment systems, a rotary potentiometer is used to adjust the duty cycle of the pulse width modulation system and then to adjust the light brightness; in code locks and security systems, a rotary potentiometer is used to adjust the opening and closing speed of the door. The 392JB25K rotary potentiometer is especially suitable for these applications with adjustable voltage requirements.

Working Principle

The 392JB25K rotary potentiometer is composed of resistor, moving contact and static contact. When the rotary knob is rotated, the moving contact is adjusted to achieve the required resistance value, and the resistance value output to the equipment. The working principle is basically the same as other types of potentiometer: the resistor is composed of two fixed resistances in series, one of which is not adjustable, and the other is connected with the rotary knob. When the rotary knob is rotated, the resistance values of the two resistances change, and the voltage division ratio is adjusted accordingly. The voltage output by the two ends of the potentiometer varies with the adjustment of the rotary knob, and the resistance also changes accordingly.

In summary, the 392JB25K rotary potentiometer is a kind of passive electronic component, which is used to control the voltage variator of electronic instruments and adjust the resistance value output to the equipment, and has the characteristics of simple structure, accurate control and wide application.