The **FSE-1AB-R** is a specific electronic component manufactured by **Tai-Shing Electronic Components (TSE)**. It is a high-performance, compact electromagnetic buzzer (transducer) primarily used for sound signaling in electronic devices. --- ## 1. Technical Specifications The following table outlines the core electrical and physical characteristics of the FSE-1AB-R: | Parameter | Specification | | :--- | :--- | | **Type** | Magnetic Transducer (External Drive) | | **Rated Voltage** | 1.5 Vp-p | | **Operating Voltage** | 1.0 ~ 2.0 Vp-p | | **Rated Current** | Max. 80 mA | | **Sound Pressure Level (SPL)** | Min. 85 dB (at 10cm) | | **Resonant Frequency** | 2,730 Hz | | **Coil Resistance** | 5.5 ± 1.0 Ω | | **Operating Temperature** | -20°C to +70°C | | **Mounting Type** | Through-hole (DIP) | --- ## 2. Key Features * **External Drive:** Unlike "indicators" that have internal circuitry, this "transducer" requires an external square wave signal to produce sound. This allows the designer to control the frequency and pitch. * **Compact Form Factor:** It typically features a small diameter (approx. 12mm), making it ideal for high-density PCB layouts. * **High Reliability:** Built for longevity in consumer electronics and industrial signaling. * **RoHS Compliant:** Meets environmental standards for hazardous substances. --- ## 3. Implementation (Code Example) Since this is an external drive transducer, you must pulse the signal at its resonant frequency (**2730 Hz**) to achieve the maximum volume. Here is a simple Arduino example: ```cpp const int buzzerPin = 9; // Connect buzzer to Pin 9 void setup() { pinMode(buzzerPin, OUTPUT); } void loop() { // Generate a tone at the resonant frequency of 2730Hz tone(buzzerPin, 2730); delay(500); // Sound for 0.5 seconds noTone(buzzerPin); // Stop sound delay(500); // Wait for 0.5 seconds } ``` --- ## 4. Common Applications 1. **Consumer Electronics:** Microwave beep alerts, washing machine end-of-cycle signals. 2. **Instrumentation:** Alarm triggers in handheld multimeters or medical devices. 3. **Computers:** Motherboard "POST" code beepers. 4. **Security:** Feedback for keypad entries or low-battery warnings in smoke detectors.