3V Active Buzzer – Compact Sound Alarm Module for Low-Voltage Electronics Projects The 3V Active Buzzer is a miniature sound-emitting device designed to operate at low voltages, making it ideal for portable, battery-powered electronics and microcontroller-based projects. With a built-in oscillation circuit, this active buzzer produces a steady tone when supplied with 3V DC—no need for external frequency generation or PWM signals. Compact and lightweight, it is perfect for applications requiring simple audio feedback such as alarms, button clicks, and notifications in Arduino, ESP32, and other 3.3V logic systems. Key Features Self-driven active buzzer (no external signal required) Operates directly from 3V DC supply Low power consumption – ideal for battery-operated devices Small form factor suitable for compact designs Produces a clear and audible tone (typically ~80dB) Compatible with 3.3V logic systems (Arduino, ESP8266, ESP32, etc.) Product Specifications Feature Specification Buzzer Type Active (with internal oscillator) Operating Voltage 3V DC Operating Current <10mA Sound Output ~75–85 dB (at 10 cm) Frequency Fixed (~2.7kHz to 3kHz depending on model) Dimensions ~7mm–12mm diameter x ~8mm height (varies) Mounting Type PCB mount or wire leads Polarity Marked Yes Material Plastic housing Applications Battery-powered alarms and indicators Notification systems in portable devices Toy and game sound effects Timer and alert feedback in DIY electronics Low-voltage embedded systems and wearables
