The **AS03208MS-3-R** is a high-performance miniature speaker manufactured by **PUI Audio**. It is specifically designed for compact electronic devices requiring clear sound output within a small footprint. --- ### 1. Technical Specifications The following table summarizes the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Speaker Type** | Dynamic, Permanent Magnet | | **Impedance** | 8 Ohms (±15%) | | **Rated Power** | 1.0 Watt | | **Maximum Power** | 1.5 Watts | | **Sound Pressure Level (SPL)** | 88 dB @ 1W / 0.1M | | **Resonant Frequency (Fo)** | 500 Hz (±20%) | | **Frequency Range** | 500 Hz ~ 20,000 Hz | | **Magnet Material** | Neodymium (NdFeB) | | **Weight** | ~4.5 grams | --- ### 2. Key Features * **Neodymium Magnet:** Utilizes high-grade Neodymium to provide a strong magnetic field in a lightweight package, ensuring high efficiency and sensitivity. * **Mylar Cone:** The diaphragm is typically made of Mylar (polyester film), which is resistant to moisture and provides a consistent frequency response. * **Compact Dimensions:** Usually measures approximately 32mm in diameter (as indicated by the "32" in the part number prefix), making it ideal for handheld electronics. * **Spring Contacts / Lead Wires:** Depending on the specific revision, these parts often feature solder pads or pre-attached leads for easy PCB integration. --- ### 3. Common Applications This speaker is commonly integrated into the following types of electronic systems: 1. **Handheld Terminals:** Scanners, GPS units, and mobile point-of-sale (POS) systems. 2. **Medical Instrumentation:** Diagnostic equipment that requires audible alarms or voice prompts. 3. **Security Systems:** Control panels and intercoms. 4. **IoT Devices:** Smart home hubs and voice-activated assistants. --- ### 4. Typical Circuit Connection To drive this speaker using a microcontroller (like an Arduino or ESP32), a simple transistor circuit or a Class-D audio amplifier is required. ```cpp // Example: Driving a 1W 8-ohm speaker via a PAM8403 Amplifier // VCC -> 5V // GND -> GND // L/R Input -> PWM Pin (through RC filter) // Output -> AS03208MS-3-R Terminals ```