F78BA102-B1

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Rotary Potentiometers, Rheostats

F78BA102-B1 is a rotary potentiometer, also known as a rotary rheostat. It is a device that utilizes an adjustable wheel to control electrical 0 to 10V signals. It works by measuring, then scaling the value of a resistance into a voltage.

Application Field and Working Principle of F78BA102-B1

F78BA102-B1 finds wide applications in control systems, such as lighting systems, HVAC systems, motor controls, audio/video systems, and other electronic equipment, as it can be used to create reliable electrical connections and provide precise control of the electrical signals. Its working principle is as follows:

This potentiometer uses a wiper or variable contact, which is connected to the movement shaft. As the shaft and wiper move, the resistance between the wiper contact and the two ends of the main track changes, and this changes the resistance between these two end points, allowing a voltage signal to be created with an appropriate scaling. When the wiper is at one end of the main track, the maximum resistance is displayed, and a minimum voltage is generated; and when the wiper is at the other end of the main track, the least resistance is generated, and a maximum voltage is indicated. The wiper\'s position is used to set the exact voltage signalled by the potentiometers.

This wiper will move from one end of the main track to the other, determined by the applied voltage. Its position is adjustable; this voltage applied to it will move the wiper from end to end. The track of the device, depending on its type, is linear, logarithmic or anti-logarithmic, which changes the rate at which the voltage increases or decreases. This type of device is perfect for controlling media equipment and instruments, as it can be adjusted with fine precision.

F78BA102-B1 is also capable of acting as either a rheostat or a potentiometer. When used as a rheostat, no voltage is applied, and it functions as a variable resistor. With this type of device, the same resistance value is maintained regardless of the size of the track. The only variable is the current, which can be adjusted using this device. As a potentiometer, the voltage applied determines the position of the wiper. The voltage and current can also be regulated simultaneously using this type of potentiometer.

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