The **PVC2115** is a common part number associated with **Trimmer Potentiometers** (variable resistors), typically manufactured by companies like **Murata** or other generic electronic component suppliers. These are used for fine-tuning circuit parameters during the manufacturing or calibration process. --- ### 1. Key Technical Specifications Below are the typical technical characteristics found in the PVC2115 series: | Parameter | Specification | | :--- | :--- | | **Component Type** | Single-turn Trimmer Potentiometer | | **Mounting Type** | Through-hole (PCB) | | **Power Rating** | 0.1W to 0.5W (model dependent) | | **Standard Resistance Range** | 100 $\Omega$ to 2 M$\Omega$ | | **Resistance Tolerance** | ±20% or ±10% | | **Adjustment Angle** | ~210° to 270° | | **Temperature Coefficient** | ±250 ppm/°C | --- ### 2. Physical Construction The PVC2115 is designed for durability and precision within a small footprint: * **Resistive Element:** Usually made of **Cermet** (Ceramic-Metal composite), which provides better stability and lower temperature coefficients than carbon film. * **Housing:** A dust-proof or semi-sealed plastic casing to prevent environmental contamination of the contact wiper. * **Terminal Layout:** Standard 3-pin configuration (Input, Wiper, Ground) with a lead pitch designed for standard breadboards or PCBs. * **Adjustment Slot:** Features a cross-head or flat-head slot for screwdriver adjustment. --- ### 3. Common Applications Since these are "set and forget" components, they are used where a circuit needs initial calibration but not constant user interaction: 1. **Voltage Regulation:** Fine-tuning the output voltage of a DC-DC converter or power supply. 2. **Sensor Calibration:** Adjusting the threshold or sensitivity of light, temperature, or proximity sensors. 3. **Timing Circuits:** Adjusting the RC time constant in oscillator circuits (like the 555 timer). 4. **Audio Equipment:** Setting internal gain stages or bias levels in amplifiers. --- ### 4. Circuit Symbol and Connection In a schematic, the PVC2115 is represented as a resistor with an arrow pointing to the center: ```text (1) Pin 1 (Fixed) | [ ] <-----| [ ] <--- (2) Pin 2 (Wiper/Adjustable) [ ] | (3) Pin 3 (Fixed) ``` **Note:** If you are using this as a simple variable resistor (Rheostat), you connect Pin 2 to either Pin 1 or Pin 3. ---