T93YB504KT20

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Trimmer Potentiometers

Trimmer potentiometers, also known as trimmers, adjustable resistors, trimmer resistors, preset resistors, presets, or variable manual controllers, are small variable resistors used in electronics to set the value of a fixed resistance in a circuit. Trimmer potentiometers are three-terminal devices, each terminal being connected to a wiper plate that forms a sliding contact over a resistor track. The resistors themselves can be of various types including carbon film, conductive plastic, or wire-wound. All the three terminals of the trimmer potentiometer are resistor-coated insulated wires, and the track is typically a wire-wound resistor.

The T93YB504KT20 model trimmer potentiometer is a 2W resistance-variable trimmer with a range of 0-2KΩ. It is a 3-Terminal device, having three wires– one common wire T and two varies one from 0 to 2K. The long side of the trimmer is connected to the common terminal T, and the two short terminals are connected to the T1 and T2, respectively. The difference between two short terminals makes up the range of 0 to 2K with a linear transfer of the signal at different resistance values.

Trimmer potentiometers are commonly used in applications where a precise and adjustable resistance value is required, for example, in regulating the level of active components, such as amplifiers and transistors. Additionally, they are used in simple voltage divider circuits and frequency tuning. Furthermore, trimmer potentiometers can be used as circuit calibrators for gain control and in signal conditioning where the input signal needs to be adjusted for accurate output.

Working Principle

The working principle of trimmer potentiometer is based on the movement of an adjustable metal plate called the wiper across a resistor track. The voltage between the wiper and the common terminal (socket) of the trimmer is called the output voltage. When the wiper is moved to a certain position along the track, a resistance is created between the wiper and the common terminal, creating an output voltage that is proportional to the resistance value and the type of resistor track.

The T93YB504KT20 trimmer potentiometer uses three terminals - T, T1, and T2. The common terminal (T) is connected to the long side of the trimmer while the other two terminals, T1 and T2, are connected to the two short sides of the trimmer. The short sides can be seen as “gates” or a “gate”-and-“clamp” which open and close to control the output voltage and resistance of the trimmer. As the wiper moves up or down the track, the output voltage of the trimmer changes accordingly.

In summary, trimmer potentiometers are a type of adjustable resistors with three terminals, two of which vary the resistance of the device and the other provides the common connection. They are used in applications where a very precise and adjustable resistance value is required and are widely used in various simple and complex electronic circuits. The T93YB504KT20 model trimmer potentiometer is a 2W resistance-variable trimmer with a range of 0-2KΩ, having a wiper that moves up or down the track to adjust the output voltage and resistance.

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