Piezo Buzzer 27mm Passive Piezoelectric Sounder Ceramic Disc 2 Wire (27mm Piezo Buzzer)
The 27mm piezo buzzer is a larger diameter piezoelectric sound device designed for higher sound output and better vibration sensitivity compared to smaller sizes. It consists of a ceramic piezo element bonded to a metal plate and is widely used in alarms indicators and audio sensing systems.
Key Features -
- 27mm diameter piezoelectric buzzer element
- Passive type requires external signal or oscillator
- Higher sound output compared to smaller sizes
- Low power consumption device
- Compact and lightweight structure
- Suitable for PCB mounting and enclosure integration
Specifications -
- Type - piezoelectric buzzer passive
- Diameter - approx 27mm
- Operating voltage - approx 3V to 24V depending on drive
- Resonant frequency - approx 2kHz to 6kHz typical
- Sound output - approx 85dB to 100dB at 10cm
- Construction - ceramic disc with metal plate
- Lead type - solder pads or pre attached wires
Applications -
- Alarm and warning systems
- Electronic buzzers and beepers
- Arduino and microcontroller projects
- Audio feedback and indication circuits
- Vibration sensing and pickup systems
Pinout Configuration -
- Positive - connected to drive signal
- Negative - connected to ground
Working Principle -
The piezo buzzer operates using the piezoelectric effect where the ceramic material deforms when voltage is applied generating mechanical vibrations. These vibrations produce sound waves at audible frequencies and can also be used to detect vibrations when used as a sensor.
