KY-012 KY012 3pin Active Buzzer Alarm Sensor Module

Description

1. Active Buzzer: The module includes an active piezoelectric buzzer that produces sound when voltage is applied. It’s “active” because it doesn’t rely on external oscillation or a driver circuit; it can be directly controlled by applying power.
2. 3-Pin Configuration: The KY-012 module typically has three pins: VCC (power supply), GND (ground), and SIG (signal). The signal pin is used to control the buzzer.
3. Digital Input: The module is controlled through a digital signal applied to the SIG pin. You can turn the buzzer on or off by toggling the signal from your microcontroller or other digital control device.
4. Compact Size: The module is small and easy to integrate into various projects. It is often used in alarms, timers, and alert systems.
5. Low Power Consumption: It is designed to be energy-efficient, making it suitable for battery-powered applications.