KY-012 Active Buzzer Module

KY-012 Active Buzzer Module is a compact audio signaling solution designed for straightforward integration into electronic projects. It provides reliable, clear tones with low power consumption and simple digital control, making it suitable for both hobbyist and professional applications. Operating voltage: 3.0–5.0V for broad microcontroller compatibility. Sound frequency: approximately 2,300 Hz for a clear alert tone. Dimensions: 20 mm × 16 mm for easy installation in confined spaces. Current consumption: around 30 mA to conserve battery life in portable builds. Control: simple digital signal activation using a single GPIO pin. The module incorporates a built-in oscillation circuit so it generates sound independently when powered, removing the need for external oscillators or additional tone-generation circuitry. This reduces component count and simplifies circuit layouts, compared with passive buzzer options that require external driving signals. Designed for efficient continuous operation, the KY-012 delivers steady and uniform sound output with minimal interference and optimized power usage. Its small footprint and straightforward interface make it easy to add audible alerts to alarms, timers, user interfaces, and various embedded systems without complicating your design.