Piezo Buzzer 20mm Passive Piezoelectric Sounder Ceramic Disc 2 Wire (20mm Piezo Buzzer)
The 20mm piezo buzzer is a compact piezoelectric sound device used for audio indication and vibration sensing in electronic circuits. It consists of a ceramic piezo element bonded to a metal plate and is widely used in alarms indicators and embedded systems.
Key Features -
- 20mm diameter piezoelectric buzzer element
- Passive type requires external signal or oscillator
- Low power consumption device
- Compact and lightweight design
- Fast response with clear sound output
- Suitable for PCB mounting and DIY applications
Specifications -
- Type - piezoelectric buzzer passive
- Diameter - approx 20mm
- Operating voltage - approx 3V to 24V depending on drive
- Resonant frequency - approx 2kHz to 6kHz
- Sound output - approx 85dB to 100dB at 10cm
- Current consumption - low current operation
- Construction - ceramic disc with metal plate
Applications -
- Alarm and warning systems
- Electronic buzzers and beepers
- Arduino and microcontroller projects
- Timer and notification circuits
- Sound generation and feedback 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 making it suitable for indication and alert applications.
