### Technical Overview of AS02008MR-5-R The **AS02008MR-5-R** is a high-quality, miniature speaker manufactured by **PUI Audio**. It is specifically designed for compact electronic devices where space is limited but clear sound reproduction is required. --- ### 1. Key Technical Specifications The following table outlines the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Manufacturer** | PUI Audio | | **Transducer Type** | Dynamic (Moving Coil) | | **Impedance** | 8 Ohms (±15%) | | **Power Rating (Nominal)** | 0.5 Watts | | **Power Rating (Maximum)** | 0.8 Watts | | **Frequency Range** | 500 Hz ~ 20,000 Hz | | **Sound Pressure Level (SPL)** | 86 dB @ 0.1W / 0.1M | | **Cone Material** | Mylar (Polyester) | | **Magnet Material** | NdFeB (Neodymium) | | **Dimensions** | 20mm x 20mm x 3.8mm | --- ### 2. Internal Electronic Construction The AS02008MR-5-R operates on the principle of electromagnetism. Its internal architecture consists of: * **Neodymium Magnet:** A high-strength rare-earth magnet that provides a powerful magnetic field despite its small size. * **Voice Coil:** A fine copper wire wound around a bobbin. When an AC signal passes through, it creates a fluctuating magnetic field. * **Mylar Diaphragm:** A durable, moisture-resistant polyester film. It is attached to the voice coil and vibrates to push air, creating sound waves. * **Frame/Housing:** A rigid square frame that protects the internal components and provides mounting stability. --- ### 3. Application Use Cases Due to its thin profile (3.8mm) and Mylar construction, this speaker is ideal for: 1. **Handheld Devices:** GPS units, scanners, and handheld radios. 2. **Medical Equipment:** Portable monitors and diagnostic tools requiring audible alerts. 3. **IoT & Smart Home:** Smart doorbells, security panels, and voice-guided interfaces. 4. **Harsh Environments:** The Mylar cone offers better resistance to humidity and moisture compared to traditional paper cones. --- ### 4. Integration Considerations * **Mounting:** The square shape allows for easy integration into enclosures. Ensure a proper acoustic seal around the front of the speaker to maximize SPL. * **Driving Circuit:** Since it is an 8-ohm speaker, it can be driven directly by a standard Class-D audio amplifier or a simple transistor circuit for beep alerts. * **Polarity:** Observe the "+" and "-" markings on the solder pads to ensure correct phase alignment, especially if using multiple speakers.