ST-00017

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Sound Impact Sensor

Contents

Overview

The Sound Impact Sensor provides a means to add noise detection to your project and responds to loud noises such as a clap of the hands. Through the on-board microphone, this sensor detects changes in decibel level, which triggers a high pulse to be sent through the signal pin of the sensor. This change can be read by an I/O pin of any microcontroller.

DSC 0002.JPG DSC 0004.JPG

Product Features

  • Detection range up to 3 meters away
  • On-board potentiometer provides an adjustable range of detection
  • 3-pin SIP header ready for breadboard or through-hole projects
  • Easy interface to any microcontroller
  • Single bit active-high output
  • Built-in series resistor for compatibility with the Propeller microcontroller and other 3.3 V devices


Technical Details

  • 3-pin SIP header ready for breadboard or through-hole projects
  • Voltage requirements: 5 VDC
  • Communication: Single bit high/low output
  • Dimensions: 0.6 x 1.5 in (1.5 x 3.8 cm)
  • Operating temp range: 32 to +158 °F (0 to +70 °C)

Applications Ideas

  • Noise activated alarm system
  • Holiday animated props
  • Monitoring systems
  • Robotic Control

Pin Definitions

Pin Name Function
1 GND Ground
2 5V 5 VDC
3 SIG Signal Pin

Connection Diagram

For use with the included sample programs below

Sound Impact Sensor diagram.JPG

Sensitivity

The Sound Impact Sensor has a maximum detection range of 3 meters. However, if you plan to use this sensor in an area where environmental factors can trigger false readings, the range can be shortened by adjusting the potentiometer on the front of the board.

Resources and Downloads

Sound Impact Sensor BS2 Example Code

This program will display the current state of the output pin from the Sound Impact Sensor connected to P0 using the Debug Terminal included in the BASIC Stamp Editor software, available for download in the link below

Propeller

This program will display the current state of the output pin from the Sound Impact Sensor connected to P0 using the Parallax Serial Terminal. Note: This application uses the Parallax Serial Terminal.spin object for displaying the state of the sensor. This object as well as the Parallax Serial Terminal itself is installed with the Propeller Tool v1.2.6 which is available from the link below