What is a semi-fixed resistor?

A trimmer potentiometer is a type of variable resistor that allows for manual adjustment of its resistance value. It is commonly used in circuits where fine tuning is required. As the name suggests, it is positioned between fixed resistors and fully adjustable resistors, providing a balance between both. Once adjusted, the setting remains fixed, making it ideal for settings that don’t need frequent changes. Typically, a rotary knob or sliding mechanism is used to change the resistance value within a specific range. Common applications include audio equipment for volume control and voltage setting in power supply circuits. Trimmer potentiometers are often used in environments that require long-term reliability and stability, and are usually mounted on a panel for easy access.

Application of semi-fixed resistor

✅ Audio equipment volume control
Trimmer potentiometers are commonly used in audio equipment for volume control and tone adjustments.
✅ Voltage setting in power supply circuits
They are used in power supply circuits where precise voltage adjustments are needed.
✅ Calibration work
Trimmer potentiometers are used in calibration tasks to set accurate reference values in measurement devices.

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