Piezo Disc Sensor (50mm/ 40mm/ 20mm)

The Piezo Disc Sensor is a compact piezoelectric transducer designed to detect vibrations, knocks, impacts, and sound waves. It works by converting mechanical stress or vibration into an electrical signal, making it ideal for sensing physical movement and acoustic changes in electronic circuits.

Unlike active buzzer modules, a piezo disc does not generate sound by itself when powered directly. Instead, it acts as a sensor or speaker element depending on the circuit design. When used as a sensor, it produces a small voltage signal when subjected to vibration or pressure, which can be measured using Arduino, ESP32, Raspberry Pi, and other microcontrollers.

Its thin, lightweight construction makes it suitable for robotics, musical instruments, security systems, impact detection, and experimental electronics projects.

Features
Piezoelectric vibration sensing element
Detects knocks, taps, and vibrations
Converts mechanical movement into electrical signals
Thin and lightweight design
High sensitivity
Low power consumption
Easy integration with microcontrollers
Suitable for analog signal measurement

Applications
Vibration detection systems
Knock sensors
Impact detection
Sound sensing projects
Electronic drums and musical instruments
Alarm systems
Robotics
Structural monitoring
Arduino and ESP32 projects
DIY electronics experiments

Compatible With
Arduino Uno
Arduino Nano
Arduino Mega
ESP32
ESP8266
Raspberry Pi
STM32
Other microcontroller platforms

Technical Specifications
Component Type: Piezoelectric Disc Sensor
Material: Piezoelectric ceramic
Output: Analog voltage signal
Detection: Vibration, impact, sound
Operating Mode: Passive sensor
Diameter: Model dependent (commonly 20mm–35mm)
Connection: Two-wire terminal
Power Requirement: No external power required for sensing

Package Includes
1 × Piezo Disc Sensor