A buzzer is an electroacoustic device that produces sound when activated by an electrical signal. It is commonly used as an audible signaling device in various applications, such as alarms, notifications, and alerts.
Key Features of a Buzzer:
- Operating Principle: Converts electrical energy into mechanical vibrations to generate sound waves.
- Types:
- Piezoelectric Buzzer: Uses a piezoelectric material that vibrates when an electrical signal is applied.
- Electromechanical Buzzer: Uses an electromagnet and diaphragm to produce sound.
- Sound Output: Produces tones ranging from a simple beep to continuous or pulsed sound, depending on the input signal.
- Power Requirements: Operates on low voltages, typically 3V to 12V.
Applications:
- Alarm systems (e.g., fire alarms, intruder alarms).
- Notification devices (e.g., doorbells, timers).
- Automotive systems (e.g., seatbelt reminder, reverse warning).
- Consumer electronics (e.g., microwave ovens, washing machines).
Buzzers are valued for their simplicity, reliability, and ability to grab attention with sound.