## Technical Overview of AI-2438-TT-R The **AI-2438-TT-R** is a high-performance **Piezo Audio Indicator** (buzzer) manufactured by **PUI Audio**. It is designed for applications requiring a clear, loud audible alert with low power consumption. --- ### 1. Key Technical Specifications Below is a breakdown of the electronic characteristics and physical properties of the device: | Feature | Specification | | :--- | :--- | | **Technology** | Piezoelectric | | **Rated Voltage** | 12 VDC | | **Operating Voltage Range** | 3 ~ 20 VDC | | **Current Consumption** | Max 10 mA at 12 VDC | | **Sound Pressure Level (SPL)** | 92 dBA @ 10cm | | **Resonant Frequency** | 3,800 Hz ± 500 Hz | | **Tone Type** | Continuous | | **Mounting Type** | Through Hole (PC Pins) | | **Housing Material** | PBT (Polybutylene Terephthalate) | --- ### 2. Functional Components The AI-2438-TT-R is an **indicator**, meaning it contains internal circuitry. Unlike a "transducer," it does not require an external frequency generator to produce sound. * **Internal Drive Circuit:** It features a built-in oscillator. When a DC voltage within the specified range is applied, the circuit automatically converts it into an AC signal at the resonant frequency to drive the piezo element. * **Piezoelectric Element:** A ceramic disc that vibrates when an electric field is applied. This vibration creates the pressure waves we hear as sound. * **Housing/Resonator:** The plastic casing is acoustically tuned to the 3.8 kHz frequency to amplify the sound output. --- ### 3. Usage & Connectivity Because this is a DC-driven device, the polarity must be observed during installation. **Basic Circuit Connection:** ```markdown [Positive Terminal (+)] ----> 3V to 20V DC Source [Negative Terminal (-)] ----> Ground (GND) ``` --- ### 4. Typical Applications * **Medical Equipment:** Alarms for patient monitors or diagnostic tools. * **Industrial Controls:** Status indicators for control panels or safety shut-offs. * **Consumer Electronics:** High-pitch alerts for household appliances or timers. * **Security Systems:** Audible feedback for keypads or entry sensors.