The **MA14TBA-R** is a specific electronic component typically identified as a **Miniature Audio Transducer (Buzzer)** manufactured by companies like Challenge Electronics or similar specialized acoustic component providers. Below is a detailed breakdown of its electronic characteristics and specifications. --- ## 1. Component Overview The MA14TBA-R is a **magnetic (electromagnetic) transducer**. Unlike a piezo buzzer which uses ceramic crystals, this part uses an internal coil and magnet assembly to create sound. ### Key Specifications | Parameter | Typical Value / Detail | | :--- | :--- | | **Type** | Magnetic Transducer (Requires external drive) | | **Sound Pressure Level (SPL)** | ~85 dB at 10cm | | **Rated Voltage** | 1.5 Vp-p | | **Operating Voltage** | 1.0 ~ 2.0 Vp-p | | **Current Consumption** | Max 30mA - 40mA | | **Resonant Frequency** | ~2,048 Hz (Standard tone) | | **Mounting Type** | Through-hole (Pins) | | **Polarity** | Polarized (Usually marked with +) | --- ## 2. Technical Characteristics ### Internal Construction The device consists of: * **A Copper Coil:** Located around a core. * **A Permanent Magnet:** Provides the base magnetic field. * **A Metal Diaphragm:** Reacts to the electromagnetic field to create air pressure waves (sound). ### Driving Circuitry Since this is a **Transducer** (and not an "Indicator"), it does not have internal oscillation circuitry. * **Input Requirement:** It requires a square wave signal (PWM) at its resonant frequency (2048 Hz) to produce sound. * **DC Warning:** Do not apply a constant DC voltage to this part; it will act as a short circuit through the coil and may burn out. --- ## 3. Implementation Example To drive the MA14TBA-R with a microcontroller (like an Arduino), you typically use a transistor to handle the current, as the I/O pin may not provide enough amperage. ```cpp // Simple Arduino code to drive the MA14TBA-R int buzzerPin = 9; // Connected to the base of a transistor void setup() { pinMode(buzzerPin, OUTPUT); } void loop() { // Generate a 2048Hz square wave tone(buzzerPin, 2048); delay(1000); noTone(buzzerPin); delay(1000); } ``` --- ## 4. Common Applications * **Handheld Devices:** Due to its small form factor. * **Medical Equipment:** For audible alerts and alarms. * **White Goods:** Washing machine or microwave end-of-cycle beeps. * **Computers:** Motherboard POST code beepers.