27mm Piezoelectric Ceramic Buzzer with Cable Soldered

The 27mm Piezoelectric Ceramic Buzzer with Cable Soldered is a 27mm diameter piezo ceramic disc that produces a tone output at 10kHz ± 0.5kHz with an 85dB sound pressure level, rated for -20°C to 70°C operation, with the connecting wires pre-soldered for immediate use without additional assembly. The piezo ceramic buzzer generates sound when an AC signal or square wave at its resonant frequency is applied across the disc, causing the ceramic material to vibrate and produce an audible tone through the metal disc body.

The 27mm piezoelectric disc is bidirectional — the same physical principle that converts electrical signal to mechanical vibration (buzzer mode) also works in reverse, where mechanical stress, tapping, or vibration on the piezoelectric disc generates a small AC voltage that can be read as a sensor input. This dual nature means the piezoelectric sensor can be wired either to an Arduino digital/PWM output pin to produce sound at the 10kHz resonant frequency, or to an Arduino analog input (often with a protection resistor) to detect knocks, taps, or vibration events as a piezoelectric plate sensor. The piezoelectric disc datasheet rating of 85dB applies specifically to driven buzzer mode at the resonant frequency.

Driving the piezoelectric disc at frequencies away from its 10kHz resonant point produces significantly lower volume — for loudest output, the drive signal frequency should match the rated 10kHz ± 0.5kHz tolerance. Available from StemVolt, this piezoelectric buzzer is suitable for students and enthusiasts creating alarm systems, audio circuits, and embedded electronics projects that require efficient sound or vibration sensing.

Related Products: 

• Checkout Passive Buzzer Module
• Explore the Force, Flex and Load Sensor Category

Features:

• 10kHz resonant frequency produces 85dB tone in buzzer mode
• Bidirectional — works as buzzer output or knock/vibration sensor input
• Pre-soldered cable ready for direct Arduino connection without assembly
• -20°C to 70°C rating suits indoor and outdoor enclosure builds
• 27mm metal disc mounts in alarm and enclosure project boxes

Technical specifications:

 Applications:

• 27mm Piezoelectric Ceramic Buzzer used for Arduino alarm and notification sound
• College project uses piezo ceramic buzzer for security alert tone
• Knock sensor uses piezoelectric disc for door tap detection build
• Drum pad uses piezoelectric sensor for trigger vibration input project

Package includes:

• 1 x 27mm Piezoelectric Ceramic Buzzer