35mm Piezoelectric Sensor / Transducer / Buzzer

The 35mm Piezoelectric Sensor / Transducer / Buzzer is a passive piezoelectric disc that converts mechanical movement into an electrical voltage. It is particularly useful when a project needs to detect knocks, impacts, vibration, or acoustic resonance.

The copper and ceramic construction provides a simple and lightweight sensing element that can be attached to a suitable surface or acoustic instrument. The analog output can then be processed using an ADC, comparator, amplifier, or microcontroller-based circuit.

Features

• 35mm diameter piezoelectric disc
• Copper and ceramic construction
• Generates analog voltage from mechanical vibration
• Sensitive to knocks, impacts, pressure, and acoustic energy
• Compact and lightweight design
• Suitable for surface mounting
• Can be used as a vibration sensor or audio pickup
• Can function as a buzzer/transducer with suitable drive circuitry
• Compatible with Arduino, ESP32, Raspberry Pi, and other electronics projects
• Useful for educational piezoelectric experiments
• Wiring not included

Applications

• Musical instrument pickups
• Acoustic guitar and violin pickups
• Drum and electronic percussion triggers
• Knock detection systems
• Impact detection
• Vibration monitoring
• Sound detection circuits
• DIY microphones and contact microphones
• Arduino and ESP32 projects
• Raspberry Pi sensor projects
• Educational electronics experiments
• Embedded event detection systems

How to Use

1. Solder suitable wires to the two electrodes of the piezo disc.
2. Mount the element securely on the surface or instrument where vibration needs to be detected.
3. Connect the sensor to an appropriate signal-conditioning or ADC circuit.
4. Read and process the generated voltage using the desired controller.
5. For buzzer/transducer operation, drive the element with an appropriate electrical signal and suitable circuit.

Important Notes

• Wiring is not included; wires must be soldered separately.
• This is a raw piezoelectric element, not a complete sensor module.
• Mechanical impacts can produce voltage spikes, so use suitable protection when connecting it to Arduino, ESP32, Raspberry Pi, or other sensitive inputs.
• Avoid excessive bending, crushing, or flexing of the ceramic disc.
• Handle the element carefully during soldering and installation.
• Use controlled soldering heat and avoid prolonged heating of the ceramic layer.
• The sensor's output depends on the amount and type of mechanical stress applied.
• The specified resonant frequency is approximately 1.8 ±0.3kHz.
• Please allow approximately 5% measurement deviation due to manual measurement.
• Product images are for illustrative purposes only and may differ slightly from the actual product.

Package Includes

• 1 × Piezoelectric Sensor / Transducer / Buzzer – 35mm Diameter