The **AB-AV100-R** is a specific electronic component, primarily recognized as a **Magnetic Buzzer (Transducer)**. These parts are designed to convert electrical signals into audible sound through electromagnetic induction. Below is a detailed breakdown of its specifications, mechanical structure, and electrical characteristics. --- ### 1. Technical Specifications The following table outlines the typical parameters for the AB-AV100-R series: | Parameter | Specification | | :--- | :--- | | **Type** | Magnetic Transducer (External Drive) | | **Rated Voltage** | 1.5V - 12V (Model dependent, typically 5V) | | **Operating Voltage** | 1.0V ~ 30V | | **Rated Current** | Max 1 - 5 mA | | **Sound Pressure Level (SPL)** | ~80 dB at 10cm | | **Resonant Frequency** | 2048 Hz - 4000 Hz | | **Mounting Type** | Through-hole (Pins) | | **Housing Material** | PBT or ABS Plastic | --- ### 2. Physical Structure and Pinout The device is usually housed in a small cylindrical black casing. * **Positive Terminal (+):** Indicated by a longer lead or a "+" sign on the top of the casing. * **Negative Terminal (-):** The shorter lead. * **Diaphragm:** A thin metal plate inside that vibrates when the magnetic coil is energized. --- ### 3. Working Principle Unlike "Active" buzzers which have an internal oscillating circuit, the AB-AV100-R is a **Passive Transducer**. 1. **Electromagnetic Induction:** An internal coil creates a magnetic field when current flows through it. 2. **Mechanical Vibration:** This magnetic field pulls a metal diaphragm. 3. **Frequency Control:** Because it is passive, you must provide a **square wave (PWM)** signal to make it sound. By changing the frequency of the input signal, you can change the pitch of the tone. ### 4. Typical Application Circuit To drive this part using a microcontroller (like an Arduino), a transistor is often used to handle the current: ```cpp // Simple Arduino code to drive the AB-AV100-R int buzzerPin = 9; // Connected to the base of a transistor void setup() { pinMode(buzzerPin, OUTPUT); } void loop() { tone(buzzerPin, 2048); // Send a 2048Hz signal delay(500); noTone(buzzerPin); delay(500); } ``` --- ### 5. Common Use Cases * **User Feedback:** "Beeps" on household appliances (microwaves, washing machines). * **Alarms:** Low-battery warnings or error alerts in handheld devices. * **Timers:** Audible signals for countdown clocks.