DESCRIPTION
The Active Buzzer Module is a plug-and-play sound output component designed for makers, students, and engineers who need a reliable audio alert solution without complex programming. Powered by an internal oscillator, this module produces a fixed-frequency tone the moment voltage is applied — no additional code or signal generation required. Simply connect it to a digital output pin on your Arduino, ESP32, Raspberry Pi, or any 3.3V–5V microcontroller, and drive it HIGH to trigger an audible beep. Its compact PCB-mounted design includes onboard current-limiting components, making it safe and straightforward to integrate into alarm systems, notification circuits, smart home projects, and classroom learning kits. Widely used in Singapore's polytechnic and ITE engineering modules, this module is an essential addition to any hobbyist or prototyping toolkit.
The Passive Buzzer Module offers full tonal control for projects that demand variable pitch, melodies, or frequency-modulated audio output. Unlike its active counterpart, this module requires a PWM (Pulse Width Modulation) signal or tone() function from your microcontroller to produce sound, giving you the flexibility to generate anything from simple beeps to multi-note tunes. It operates across the same 3.3V–5V range and interfaces directly with Arduino, ESP32, STM32, and similar platforms. The absence of an internal oscillator means you are in complete control of frequency and duration — ideal for musical projects, custom alert tones, and interactive electronics. A preferred choice among Singapore makers, hackathon participants, and STEM educators who need audio versatility in a compact, breadboard-friendly module.
TECHNICAL DETAILS
- Operating Voltage: 3.3V – 5V DC
- Operating Current: ≤ 30mA
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