The **CVR1-DC-R** is an electronic component primarily classified as a **Variable Resistor** or **Trimmer Potentiometer**. It is designed for fine-tuning voltage or current levels within a circuit by manually adjusting its resistance value. --- ## 1. Technical Specifications The following table outlines the typical characteristics of the CVR1-DC-R series (Standard values based on common industry datasheets): | Property | Description / Value | | :--- | :--- | | **Component Type** | SMT (Surface Mount Technology) Trimmer | | **Resistance Range** | Commonly 100Ω to 1MΩ (Check specific suffix) | | **Power Rating** | 0.1 Watts at 70°C | | **Maximum Voltage** | 50V DC | | **Tolerance** | ±25% | | **Rotation Angle** | 240° (Mechanical) | | **Operating Temp** | -40°C to +85°C | --- ## 2. Key Features and Physical Build ### Construction * **Carbon Film Element:** The resistive track is made of carbon, which is cost-effective for general-purpose applications. * **Wiper Mechanism:** A conductive metal brush (wiper) moves across the carbon track to vary the resistance between the terminals. * **SMD Housing:** Designed for automated pick-and-place assembly on PCBs. ### Termination Style * **"R" Suffix:** In many naming conventions, the "R" indicates the orientation or the packaging (often **Taped and Reeled**) for high-volume manufacturing. * **Terminal Count:** It typically features 3 terminals: 1. Terminal 1: Fixed end 2. Terminal 2: Wiper (Adjustable output) 3. Terminal 3: Fixed end --- ## 3. Applications The CVR1-DC-R is used in scenarios where a circuit needs a one-time or occasional calibration after assembly: * **Gain Adjustment:** Setting the gain in an operational amplifier circuit. * **Voltage Dividers:** Adjusting the reference voltage for sensors. * **LCD Contrast:** Fine-tuning the brightness or contrast of small display modules. * **Timing Circuits:** Adjusting the RC time constant for oscillators (e.g., 555 timers). --- ## 4. Pinout Configuration ```text (Top View) _______ | O | <--- Adjustment Slot |_______| / | \ [1] [2] [3] Fixed Wiper Fixed ``` ---