Vibration Sensor

Vibration Sensor Module

Shock & Vibration Detection Sensor

The Vibration Sensor Module is an electronic sensing device designed to detect vibration, shock, and sudden movement. It is widely used in Arduino, Raspberry Pi, ESP8266/ESP32, and IoT projects to monitor motion, impact, or abnormal vibration in machines and structures.

This module converts mechanical vibration into an electrical signal, providing both analog and digital outputs for flexible integration in various applications.

Key Features

• Detects Vibration, Shock, and Impact

• Analog and Digital Output Options

• Adjustable Sensitivity via Onboard Potentiometer

• Fast Response Time

• Low Power Consumption

• Compact and Lightweight Design

• Easy Integration with Microcontrollers

Working Principle

When the sensor experiences vibration or shock, the internal vibration element generates a signal proportional to the movement.
This signal is processed by an LM393 comparator, which:

• Outputs an analog voltage representing vibration intensity

• Produces a digital HIGH/LOW signal when vibration exceeds a set threshold

The sensitivity threshold can be adjusted using the onboard trimmer potentiometer.

Technical Specifications (Typical)

• Operating Voltage: 3.3V – 5V DC

• Output Types:

  • AO: Analog Output

  • DO: Digital Output

• Comparator IC: LM393

• Adjustable Sensitivity: Yes

• Response Time: < 10 ms

• Operating Temperature: −20°C to +70°C

Pin Configuration

• VCC: Power Supply (3.3–5V)

• GND: Ground

• DO: Digital Output

• AO: Analog Output

Module Components

• Vibration Detection Element:

  • Responds to motion and shock

• Comparator Circuit (LM393):

  • Converts vibration signal into digital output

• Trimmer Potentiometer:

  • Adjusts vibration sensitivity threshold

• Status LED:

  • Indicates vibration detection

Applications

• Earthquake and tremor detection

• Anti-theft and security systems

• Machine vibration monitoring

• Structural health monitoring

• Smart alarms

• Robotics and automation

• IoT-based motion detection systems

• Educational electronics projects

Advantages

• High sensitivity and fast response

• Reliable operation in noisy environments

• Flexible output options

• Easy calibration and setup