An active buzzer is an electronic device that produces sound when powered. Unlike passive buzzers, which require an external audio signal, active buzzers generate sound on their own when electricity flows through them. They are commonly used in alarms, timers, and various electronic projects. These buzzers come in different sizes and shapes, often featuring a simple two-wire connection for easy integration. Active buzzers are popular in educational settings, such as STEM programs, where students learn about electronics and circuit design. Their straightforward operation makes them ideal for beginners and hobbyists alike.