28mm Silver Piezo Disc

The 28mm Silver Piezo Disc is a compact piezoelectric electronic component designed for sound generation, vibration sensing, and pressure detection applications. It operates using the piezoelectric effect, which enables it to convert electrical energy into mechanical vibrations and mechanical vibrations into electrical signals. This unique property makes the piezo disc suitable for both audio output and sensor-based electronic circuits.

The disc has a 28mm diameter and is constructed using a piezoelectric ceramic layer bonded to a thin metal plate. When an alternating electrical signal is applied across the ceramic element, it rapidly expands and contracts, causing the metal plate to vibrate and produce sound. Likewise, when the disc is subjected to physical pressure, vibration, or impact, it generates a small electrical voltage that can be detected by electronic circuits.

The 28mm Silver Piezo Disc is widely used in piezo buzzers, electronic alarms, knock sensors, vibration detectors, electronic musical instruments, and educational electronics projects. Its compact size, lightweight construction, and high sensitivity make it an excellent choice for embedded systems and microcontroller-based applications such as Arduino, ESP32, Raspberry Pi, and other development platforms.

The piezo disc features solderable contact points for easy integration into electronic circuits. Since it contains no moving mechanical parts, it offers excellent durability, long operational life, and reliable performance with minimal maintenance.

Working Principle

The 28mm piezo disc works based on the piezoelectric effect:

• An AC electrical signal is applied across the ceramic element.

• The ceramic expands and contracts rapidly.

• The attached metal plate vibrates and produces sound waves.

• When the disc experiences vibration or pressure, it generates a small electrical voltage.

• The generated signal can be processed by electronic circuits for sensing or measurement.

This dual-function operation allows the piezo disc to be used as both a sound-producing device and a vibration sensor.

Key Features

• Diameter: 28mm

• Piezoelectric ceramic bonded to metal plate

• Functions as both a sound generator and vibration sensor

• High sensitivity to vibration and pressure

• Low power consumption

• Compact and lightweight construction

• Easy soldering with solderable contact points

• Stable and reliable performance

• Long operating life

• Compatible with Arduino, Raspberry Pi, ESP32, and other microcontrollers

Applications

The 28mm Silver Piezo Disc is commonly used in:

• Piezo buzzers

• Electronic alarm systems

• Doorbell circuits

• Knock detection sensors

• Vibration sensing circuits

• Electronic musical instruments

• Arduino projects

• Raspberry Pi projects

• Embedded systems

• DIY electronics projects

• Sound generation circuits

• Educational electronics experiments

• Security and monitoring systems

Specifications

• Product Type: Piezoelectric Disc

• Diameter: 28mm

• Material: Piezoelectric ceramic with metal plate

• Operating Function: Sound generation and vibration sensing

• Connection Type: Solderable contact points