Sensitive Microphone Sound Detector Module

Detects sound and outputs both an analog version of the sound and a digital output when an...
Vendor: Keszoox
$1.95
$4.95
$1.95

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Standard: 9-15 business days,fee is down to $3.99

Express: 4-7 business days,fee is down to $5.99

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Sensitive Microphone Sound Detector Module

Sensitive Microphone Sound Detector Module

$4.95 $1.95

Sensitive Microphone Sound Detector Module

$4.95 $1.95

Detects sound and outputs both an analog version of the sound and a digital output when an adjustable sound threshold is reached.

DESCRIPTION

The Sensitive Microphone Sound Detector Module detects sound waves and outputs both an analog version of the sound and a digital output when an adjustable sound threshold is reached.

PACKAGE INCLUDES:

  • Sensitive Microphone Sound Detector Module

KEY FEATURES OF SENSITIVE MICROPHONE SOUND DETECTOR MODULE:

  • Microphone has frequency range of 50 Hz – 13 kHz
  • Outputs the analog version of the sound
  • Outputs a digital logic level based on an adjustable sound threshold
  • LED illuminates when digital sound threshold is reached
  • 5V operation

This module incorporates a microphone and provides 2 different outputs.  One is an analog voltage representation of the sound that the microphone is picking up and the other is a digital output that goes HIGH when the sound goes above a threshold set using a potentiometer.  This is the same basic module as the Microphone Sound Detector Module, but with a slightly bigger and more sensitive microphone attached.

The analog output sits at approximately 2.5VDC (1/2Vcc) with no input, but this varies with the setting of the adjustment pot.  Any sound picked up by the microphone is imposed as an AC signal riding on this DC bias level.  The signal can be AC coupled using a capacitor to remove the DC bias if desired.

The digital output which is active HIGH, is the result of a LM393 voltage comparator IC comparing the sound amplitude to the level set by the on-board potentiometer.  Turning the pot CW increases the sensitivity.  There is a LED near the pot that comes on when the output goes active HIGH.  If the pot is turned CCW (less sensitive), the LED will always be off and if it is turned fully CW (more sensitive) it will always be on.  For best sensitivity, you will want to adjust the pot CW so that the LED is on and then adjust the pot back CCW just until the LED goes off.  That will give you the most sensitivity.  The pot can be adjusted further CCW to decrease the sensitivity and increase the sound level at which the output goes HIGH..

The board also has a red LED which lights whenever power is applied.

Module Connections

The module has a 4-pin header on the assembly for making connections.

1 x 4 Header 

  • A0 = Analog output, connects to analog input on uC
  • GND  = Ground
  • ‘+’ = 5V
  • D0 = Digital output, connects to digital input on uC

OUR EVALUATION RESULTS:

This is a useful module for experimenting with sound or taking an action based on detecting a sound of some magnitude.

This ‘Sensitive’ module uses a larger, more sensitive microphone than the standard module.

Sensitivity of the microphone is pretty good and about double that of the standard model.  We measured a frequency range of about 50Hz to 13KHz and it would go up to 20KHz but with a fairly reduced amplitude.  The scope capture below shows the analog output when the microphone picked up a voice.  This waveform is riding on a 2V DC level, so the signal was AC coupled for display.  Amplitude depends on the sound volume, in this case it was about 140mVp-p.

BEFORE THEY ARE SHIPPED, THESE MODULES ARE:

  • Inspected
  • Basic analog and digital outputs verified.
  • Packaged in a resealable ESD bag for protection and easy storage.

Notes: 

  1. None

TECHNICAL SPECIFICATIONS

Maximum Ratings
          Vcc 5V
Operating Ratings
         Microphone Lowest Range 50Hz (measured)
 Highest Range 13KHz (measured)
Dimensions L x W (PCB) 36 x 15mm (1.4 x 0.6″)
Country of Origin China

WE'RE READY TO BUILD A CUSTOM PRODUCT FOR YOU.

Contact us:
Support@keszoox.com
What we can help:
If you're looking for a wire or cable assembly, we can help.
What we need your help next:
Kindly contact us via email support@keszoox.com and send us the details fo your need, then we'll let you know how we can deliver the right solution.

Shipping Policy

All orders are dispatched from our warehouse. The shipments are fully tracked—from our door to yours. Please allow 3-5 business days for your order to be processed in addition to the shipping times below.

Shipping Times

Standard: 9-15 business days. Express: 4-7 business days.

Please note that shipping providers are extremely busy during this time, and some orders might experience a delay on top of usual delivery times. If your order is late, please allow 5-10 days more than indicated in standard shipping times before contacting our customer service. Thank you for your understanding.

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