The Active Buzzer Module is the simplest way to add audio alerts to your electronic projects. At Electrapac, we recommend this module for developers and students in Bangladesh who need a "plug-and-play" sound solution that doesn't require complex coding or external oscillators.

Product Overview

Unlike a passive buzzer, the Active Buzzer Module has its own internal oscillation circuit. This means it generates a steady, high-pitched beep (typically 2.5kHz) as soon as it receives power. You don't need to write code to produce a specific frequency; simply setting the signal pin to HIGH will trigger a clear, loud sound that is audible even in noisy environments.

Key Features for Electrapac Customers

• Self-Contained Sound Source: The internal oscillator generates the tone automatically. No "tone()" library or PWM signals are required from your microcontroller.

• Easy Logic Control: Compatible with both 3.3V and 5V logic, making it perfect for use with Arduino, ESP32, Raspberry Pi, and STM32.

• Mounting Hole: Includes a pre-drilled fixed bolt hole (approx. 2.6mm), allowing you to securely mount the buzzer inside your project casing or robot chassis.

• Transistor Driven: The module includes an onboard transistor to handle the current switching, ensuring your microcontroller pins remain safe from high current draw.

• Plug-and-Play Wiring: The 3-pin interface (VCC, GND, I/O) simplifies your circuit, reducing the clutter of resistors and external components.

Wiring & Arduino Guide

To use the Electrapac Active Buzzer, connect the pins as follows:

1. VCC: Connect to 3.3V or 5V.

2. GND: Connect to the ground.

3. I/O (or S): Connect to any digital pin.

   • DigitalWrite(pin, HIGH): The buzzer starts beeping.

   • DigitalWrite(pin, LOW): The buzzer stops.

Important Identification Tip: You can tell this is an Active buzzer because the bottom is usually sealed with black epoxy/resin. A passive buzzer typically shows the green PCB and copper coil on the underside.

Primary Applications

• Alarm Systems: Creating audible warnings for smoke, gas, or motion detection systems.

• User Feedback: A short "beep" to confirm a button press or a successful login.

• Smart Home Notifications: Alerting users when a task is finished (like a laundry timer).

• Robotics: Providing status alerts (e.g., low battery or obstacle detected).

• Fault Indicators: Beeping when a circuit or server experiences an error.

Why Shop at Electrapac?

We source our Active Buzzer Modules with high-quality piezoelectric elements to ensure a consistent volume and a long operating life for your prototypes. Visit us at www.electrapac.com for the essential modules that give your projects a voice.