97A2A-B28-A20/R51L

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Rotary Potentiometers and Rheostats are two types of electro-mechanical components, usually used together in order to control electrical signals. The 97A2A-B28-A20/R51L is a type of rotary potentiometer, a variable resistor that, along with a rheostat, is used to adjust the magnitude and direction of a given power signal.

A basic rotary potentiometer consists of three primary components: a wiper or slider, a resistive element, and a rotational knob or lever. The resistive element is usually a strip of conductive material, but can also be a coil of wire, a wafer plate, or a helix groove in some types of potentiometer. When the knob assembly is rotated, the wiper moves along the resistive element and adjusts the resistance at the output end of the circuit. In a rheostat, often referred to as a dummy coil, two resistors are used instead of one, with a single knob for adjusting the resistance between them.

Rotary potentiometers come in many different forms, with the 97A2A-B28-A20/R51L model classified as a ‘rotary slide’ potentiometer, meaning it has a slider and an inner disc that rotate separately but in the same direction. The two parts are commonly connected via a rolling plastic sleeve, which permits the connections between the two parts to move and maintain electrical contact. This 105° rotational angle is allows the mechanism to have smoother and more reliable operation, and also prolongs the life of the potentiometer.

The application of the 97A2A-B28-A20/R51L rotary potentiometer can be seen in a vast range of applications. They are often used as controls for audio volume (or other signal level) of amplifier circuits, as well as for adjusting signal strength in communication transmitters and receivers. They are also used as position or speed sensors in servo systems, and as controls for the resistance in a heating element to adjust the temperature of a device.

When it comes to the working principle of the 97A2A-B28-A20/R51L rotary potentiometer, the main principle is quite simple. If the output resistance of the device is being changed, the output signal is either increased or decreased, depending on the direction and magnitude of the adjustment. When the knob is rotated clockwise, the output resistance increases, resulting in a decrease of the output voltage; when the knob is rotated counterclockwise, the output resistance decreases, resulting in an increase of the output voltage. Thus, by controlling the knob, the strength and direction of the output signal can be adjusted.

Overall, the 97A2A-B28-A20/R51L rotary potentiometer is a versatile and reliable part used to adjust the magnitude and direction of a given power signal. Used in conjunction with a rheostat, it can provide an infinite range of values for output resistance. As such, it is an essential part of modern electronic circuits, and is used in a variety of applications ranging from audio amplifiers to motor control systems.

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