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Detailed Product Description:

The Piezoelectric Transducer sensor 27MM is an incredibly versatile and fundamental component for detecting mechanical vibrations, knocks, and impacts. Operating on the piezoelectric effect, this sensor generates a voltage when subjected to physical stress. The 27mm piezo disc is composed of a thin ceramic element attached to a metal plate, and when struck or vibrated, it produces a proportional analog voltage signal. This makes it an ideal vibration knock sensor for a wide range of creative and practical applications.

A key technical characteristic is its dual functionality. While it excels as a sensor, it can also act as an actuator. By applying a voltage, the disc vibrates, allowing it to function as a basic piezoelectric buzzer or speaker. When using it as a sensor with a microcontroller like Arduino, it is crucial to protect the analog input pins from the voltage spikes it can generate; a simple circuit with a 1 MΩ resistor is commonly used to safely limit the voltage and provide a stable signal.

From building a simple DIY vibration detector for a security alarm to creating a unique interface for a robotic project, the possibilities are endless. This sensor is also a favorite for making acoustic pickups for instruments and custom drum triggers. Its low cost, simple interface, and robust performance make this piezoelectric transducer an indispensable tool for any electronics hobbyist or engineer looking to add a reliable and sensitive physical input to their project.

The Piezo Sensor Module is designed to detect mechanical stress, knocks, or vibration and generate a small electrical signal in response. It uses a piezoelectric crystal that converts motion or pressure into voltage.

This module is widely used in applications like tap switches, knock detection alarms, interactive art installations, and vibration sensing. Its small size and easy interfacing make it ideal for Arduino or Raspberry Pi projects where motion detection is required.

 

Key Features:

• High-sensitivity piezoelectric sensor

• Detects vibration, impact, or knock signals

• Compatible with Arduino, Raspberry Pi, STM32, ESP8266

• Compact, durable, and low power

• Perfect for touch-based triggers, alarms, and musical instruments

 

Technical Specifications:

 

How to Use with Arduino:

Wiring:

Sample Arduino Code:

 

Applications:

• Security and knock alarms

• Electronic drum triggers

• Vibration feedback in robotics

• Musical instrument sensors

• Tap-detection for user interaction

 

Package Includes:

• 1 × Piezo Vibration Sensor Module