The **JT-16-R** is a specific model of an **Active Piezoelectric Magnetic Transducer (Buzzer)**. It is designed to produce a consistent audible tone when a DC voltage is applied, commonly used in control panels, timers, and alarm systems. --- ### 1. Technical Specifications The following table highlights the core electronic characteristics of the JT-16-R: | Parameter | Specification | | :--- | :--- | | **Type** | Active (Internal Drive Circuitry) | | **Operating Voltage** | 3V - 15V DC (Typically rated at 12V) | | **Rated Current** | $\leq$ 30mA | | **Sound Pressure Level** | $\geq$ 85dB at 10cm | | **Resonant Frequency** | 2300Hz $\pm$ 300Hz | | **Operating Temperature** | -20°C to +70°C | | **Mounting Type** | Through-hole (PCB Mount) | --- ### 2. Internal Electronic Components Unlike passive buzzers, the JT-16-R is an **"Active"** component, meaning it contains integrated circuitry. Its internal construction includes: 1. **Piezoelectric Ceramic Disc:** The heart of the unit. It converts electrical energy into mechanical vibrations through the piezoelectric effect. 2. **Oscillator Circuit:** An internal transistor-based multivibrator circuit. This converts the incoming DC voltage into an AC signal at the resonant frequency (2300Hz). 3. **Resonance Chamber:** A plastic housing designed to amplify the sound waves produced by the ceramic disc. 4. **Epoxy Sealant:** Protects the internal electronics from moisture and vibration. --- ### 3. Application and Connection Because it is an active buzzer, the JT-16-R is very easy to integrate into electronic circuits. * **Polarity:** It is polarity-sensitive. The longer lead (or the side marked with a `+`) must be connected to the positive voltage source. * **Driving Signal:** It requires a steady **DC voltage**. You do not need to provide a PWM or frequency signal from a microcontroller (like an Arduino). * **Example Circuit:** ```text [VCC 12V] --- [Switch/Transistor] --- [JT-16-R (+)] [JT-16-R (-)] --- [GND] ``` --- ### 4. Key Differences: Active vs. Passive | Feature | JT-16-R (Active) | Passive Buzzer | | :--- | :--- | :--- | | **Input Signal** | DC Voltage | Square Wave (PWM) | | **Complexity** | Simple (Plug and Play) | Higher (Requires external frequency) | | **Tone Control** | Fixed Frequency | Variable (Can play melodies) |