## Technical Overview of AS01308MR-R The **AS01308MR-R** is a high-quality, miniature dynamic speaker manufactured by **PUI Audio**. It is specifically designed for applications where space is premium but clear sound reproduction is required. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Type** | Dynamic Speaker (Moving Coil) | | **Impedance** | 8 Ohms ± 15% | | **Power Rating** | 0.5W (Nominal) / 0.8W (Max) | | **Frequency Range** | 500 Hz ~ 20,000 Hz | | **Sound Pressure Level (SPL)** | 86 dB ± 3dB @ 0.1W/0.1M | | **Dimensions** | 13mm (Diameter) x 3.5mm (Height) | | **Weight** | ~0.8 Grams | --- ### 2. Physical Construction The AS01308MR-R is built using lightweight materials to optimize sound output in a small form factor: * **Frame:** Typically made of plastic or lightweight metal. * **Diaphragm:** Mylar (PET) cone, which is resistant to moisture and provides a crisp high-frequency response. * **Magnet:** Neodymium (NdFeB), which provides a strong magnetic field relative to its tiny size, ensuring high efficiency. * **Termination:** Solder pads for wire attachment. --- ### 3. Application Use-Cases Due to its small 13mm diameter, this component is commonly found in: 1. **Handheld Devices:** Radios, scanners, and GPS units. 2. **Medical Equipment:** Portable monitors and diagnostic tools that require audible alerts. 3. **IoT Devices:** Smart home sensors and small security panels. 4. **Toys and Gadgets:** Small electronic novelties and PDAs. --- ### 4. Integration Guidelines When designing a PCB for the AS01308MR-R, consider the following: ```c // Example: Driving the speaker with a simple PWM signal (Microcontroller) void playTone(int frequency, int duration) { long delayValue = 1000000 / frequency / 2; long numCycles = frequency * duration / 1000; for (long i = 0; i < numCycles; i++) { digitalWrite(SPEAKER_PIN, HIGH); delayMicroseconds(delayValue); digitalWrite(SPEAKER_PIN, LOW); delayMicroseconds(delayValue); } } ``` * **Enclosure:** To improve bass response, the speaker should be mounted in a sealed or ported chamber (back-box). * **Polarity:** Observe the "+" and "-" markings to ensure proper phase, especially if using multiple speakers.