The **CSS-1014B7** is a specific electronic component, typically categorized as a **magnetic transducer** or **electromagnetic buzzer**. It is designed to convert electrical signals into audible sound through electromagnetic induction. --- ### 1. Key Technical Specifications The following table outlines the typical electrical and physical characteristics for this part: | Parameter | Specification | | :--- | :--- | | **Rated Voltage** | 1.5 Vp-p | | **Operating Voltage Range** | 1.0 ~ 3.0 Vp-p | | **Current Consumption** | Max 70mA (at rated voltage) | | **Coil Resistance** | 6.0 ± 1.0 Ω | | **Sound Pressure Level (SPL)** | Min 85 dB (at 10cm) | | **Resonant Frequency** | 2,730 Hz | | **Operating Temperature** | -30°C to +70°C | | **Mounting Type** | Surface Mount (SMD) | --- ### 2. Internal Electronic Structure The CSS-1014B7 operates as a **transducer**, meaning it does not have internal oscillation circuitry. Its internal makeup includes: 1. **Electromagnetic Coil:** A coil of fine copper wire wrapped around a core. When current flows, it creates a magnetic field. 2. **Permanent Magnet:** Provides a static magnetic field that interacts with the coil's field. 3. **Vibrating Diaphragm:** A metal disk that is pulled and released by the fluctuating magnetic field, creating sound waves. 4. **Housing:** Usually high-temperature plastic (LCP) to withstand SMD reflow soldering temperatures. --- ### 3. Application Circuitry Because this is a **transducer** (and not a "buzzer" with a built-in driver), you cannot simply apply a DC voltage to make sound. You must provide a **square wave** at the resonant frequency (approx. 2730 Hz). #### Typical Driver Circuit ```c // Example logic for driving via a Microcontroller (MCU) // 1. Connect one pin of the CSS-1014B7 to a PWM pin. // 2. Connect the other pin to Ground. // 3. Set PWM frequency to 2730 Hz. // 4. Set Duty Cycle to 50% for maximum volume. ``` *Note: It is highly recommended to use a transistor (NPN or MOSFET) as a switch to drive the component, as 70mA often exceeds the current limit of standard MCU GPIO pins.* --- ### 4. Comparison: Transducer vs. Indicator | Feature | CSS-1014B7 (Transducer) | Active Buzzer (Indicator) | | :--- | :--- | :--- | | **Input Signal** | AC/Square Wave required | DC Voltage required | | **Frequency Control** | Variable (via software) | Fixed | | **Complexity** | Higher (requires external oscillation) | Lower (Plug and play) | ---