## Detailed Overview of the AS05004PS-R The **AS05004PS-R** is a high-performance, miniature loudspeaker manufactured by **PUI Audio**. It is specifically designed for applications where space is limited but high-quality sound reproduction and durability are required. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Impedance** | 4 Ohms (±15%) | | **Rated Power (RMS)** | 0.5 Watts | | **Max Power Handling** | 0.8 Watts | | **Frequency Range** | 500 Hz ~ 20,000 Hz | | **Sound Pressure Level (SPL)** | 84 dB @ 0.1W/0.1M | | **Resonant Frequency (Fs)** | 500 Hz (±20%) | | **Diaphragm Material** | Mylar (Polyethylene Terephthalate) | | **Magnet Material** | NdFeB (Neodymium) | | **Weight** | ~2.3 grams | --- ### 2. Design and Construction Features * **Neodymium Magnet:** Utilizes high-strength Neodymium (NdFeB) magnets. This allows the speaker to maintain a high flux density in a very small footprint, resulting in better efficiency and clarity than standard ferrite magnets. * **Mylar Cone:** The use of a Mylar diaphragm makes the speaker resistant to humidity and environmental moisture, making it suitable for portable or outdoor-adjacent electronics. * **Form Factor:** It features a square frame (50mm x 50mm typically, though exact mounting vary by sub-series) with a slim profile, designed for surface or flush mounting within enclosures. * **Polarity:** Usually marked with a "+" or a red dot on the terminal to ensure phase consistency in stereo or multi-speaker arrays. --- ### 3. Common Applications Due to its 4-ohm impedance and 0.5W rating, it is commonly found in: * **Handheld Devices:** Radios, scanners, and portable medical instruments. * **IoT Devices:** Smart home hubs or security panels providing voice prompts. * **Industrial Equipment:** Audible alarms and user-interface feedback systems. * **Point of Sale (POS):** Kiosks and card readers for transaction alerts. --- ### 4. Implementation Example (Circuit Integration) When driving this speaker with a microcontroller or a small amplifier (like an LM386 or a Class-D PAM8403), ensure the output impedance is matched. ```c // Pseudo-code for generating a simple tone on an MCU pin void playAlert(int frequency, int duration) { // Ensure the amplifier driving the AS05004PS-R // is enabled and receiving the PWM signal. tone(SPEAKER_PIN, frequency, duration); } ```