Magnetic Buzzer

An electromagnetic buzzer is a device that produces sound using the principle of electromagnetic induction. It is divided into two types: active (with a built-in oscillator that sounds when powered by direct current) and passive (requiring an external square wave drive). They are small in size and generate a magnetic field through a coil, which attracts or repels a permanent magnet to drive the diaphragm to produce sound. They are commonly found in home appliances, medical equipment, and electronic toys where prompts are required.