TC76B-1-101

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Trimmer Potentiometers

Trimmer potentiometers (also known as trimmer pot, trim pot, preset pot, or variable resistor) are small electronic components designed to accurately adjust electrical or electronic circuits. Trimmer potentiometers are mainly used for fine-tuning and calibration of circuits.

TC76B-1-101 Application Field and Working Principle

The TC76B-1-101 trimmer potentiometer is a three-terminal device designed for adjustment or fine-tuning of circuits. It is constructed as an enclosed cylindrical device made of tough, corrosion-resistant plastic with integral metal plates and a polycarbonate cover. It is very stable and is used for applications where the trimming frequency is very low or level non-change. The TC76B-1-101 trimmer has three terminals: the A terminal (connected to the wiper), the B terminal (used to adjust the resistance value higher) and the C terminal (used to adjust the resistance value lower). All three terminals can be connected to conductive materials to form a complete circuit.The internal construction of the trimmer consists of an adjustable capacitance element that can be varied by the movement of its wiper. The wiper can be controlled by two small screws, or knobs, on the top of the trimmer. By turning one knob clockwise and the other counter-clockwise, it is possible to precisely adjust the value of capacitance. The working principle of the trimmer is basically a looping effect: the wiper increases or decreases the capacitance, thereby affecting the overall resistance value of the device. The TC76B-1-101 trimmer is applied to circuit adjustments for such applications as audio amplifiers, analog-to-digital converters, power supplies, filters, and biasing. The trimmer can also be used to adjust the quality and resolution of signals, or to adjust the response time of devices.

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