The **AS02508CO-2-R** is a high-quality, miniature dynamic speaker manufactured by **PUI Audio**. It is specifically designed for applications where space is limited but clear audio output is required. --- ## 1. Technical Specifications Below are the primary electronic and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Speaker Type** | Dynamic Speaker | | **Impedance** | 8 Ohms ± 15% | | **Power Rating (Nominal)** | 0.5 Watts | | **Power Rating (Max)** | 0.8 Watts | | **Sound Pressure Level (SPL)** | 84 dB ± 3dB @ 0.1W/0.1M | | **Resonant Frequency (Fo)** | 500 Hz ± 20% | | **Frequency Range** | 500 Hz ~ 20,000 Hz | | **Magnet Material** | NdFeB (Neodymium) | | **Weight** | ~2.5 grams | --- ## 2. Key Features and Construction The AS02508CO-2-R utilizes specific materials to balance durability and acoustic performance: * **Neodymium Magnet:** Provides a high magnetic flux density in a small footprint, allowing for higher efficiency and lower weight compared to ferrite magnets. * **Mylar (PET) Cone:** This material is moisture-resistant and offers a crisp sound profile, making it suitable for voice and alarm signals. * **Form Factor:** It is a round, low-profile speaker measuring approximately **25mm in diameter** and **4.8mm in height**. * **Connection:** Typically features solder pads for direct wire attachment to a PCB. --- ## 3. Common Applications Due to its small size and 8-ohm impedance (standard for most small amplifiers), it is commonly used in: 1. **Handheld Devices:** Scanners, GPS units, and walkie-talkies. 2. **Medical Instrumentation:** Audible heart rate monitors or diagnostic equipment alerts. 3. **IoT Devices:** Smart home hubs and security panels. 4. **Consumer Electronics:** Toys, clocks, and portable media players. --- ## 4. Implementation Example When driving this speaker with a microcontroller like an Arduino, it is recommended to use a simple transistor circuit or a small Class-D amplifier (like the PAM8302) to avoid overdrawing current from the I/O pins. ```cpp // Basic Square Wave Tone Generation (Arduino Example) int speakerPin = 9; void setup() { pinMode(speakerPin, OUTPUT); } void loop() { tone(speakerPin, 1000); // Send 1KHz sound signal delay(500); noTone(speakerPin); // Stop sound delay(500); } ```