Trimmer Resistors

Trimmer Resistors

Trimmer resistors, also known as trim pots or preset resistors, are a type of variable resistor used in electronic circuits for fine-tuning or adjusting the resistance value. They are typically small, rectangular components with a small screw or knob on top that can be turned to adjust the resistance value. Trimmer resistors are commonly used in applications where precise resistance values are required, such as in calibration circuits, feedback circuits, and voltage dividers. Trimmer resistors are constructed using a resistive element, such as a carbon film or cermet, which is connected to two terminals. The third terminal is connected to a wiper, which is moved by the screw or knob to adjust the resistance value. The resistance value of a trimmer resistor can be adjusted within a specified range, typically from a few ohms to several megaohms, depending on the specific model. Trimmer resistors are available in a variety of types and configurations, including surface mount, through-hole, single-turn, and multi-turn. Single-turn trimmers are the most common type and can be adjusted with a single turn of the screw or knob. Multi-turn trimmers, on the other hand, require several turns to adjust the resistance value, but offer greater precision and accuracy. In summary, trimmer resistors are a type of variable resistor used in electronic circuits for fine-tuning or adjusting the resistance value. They are constructed using a resistive element and a wiper, which is moved by a screw or knob to adjust the resistance value. Trimmer resistors are available in a variety of types and configurations, and are commonly used in applications where precise resistance values are required.

variable resistor, electronic circuits, resistance value, carbon film, cermet

— Paul Davis