Microphone Sound Detection Sensor 4 Pin

Description

The sound detector with a small electret microphone, a voltage supply range from 3.3 V to 5 V. The module is easy to use, has two outputs: an analog – to measure the intensity of the digital signal and changing state when exceeding a certain level.

Sound Detection Sensor Module Pin Configuration

Pin Name	Description
VCC	The Vcc pin powers the module, typically with +5V
GND	Power Supply Ground
DO	Digital Output Pin. Directly connected to digital pin of Microcontroller
AO	Analog Output Pin. Directly connected to an analog pin of Microcontroller

Brief about Sound Detection Sensor Module

This Sound Detection Sensor Module consists of a Microphone, resistors, capacitor, potentiometer, comparator LM393 IC, Power, and status LED in an integrated circuit.

LM393 IC

LM393 Comparator IC is used as a voltage comparator in this Sound Detection Sensor Module. Pin 2 of LM393 is connected to Preset (10KΩ Pot) while pin 3 is connected to Microphone. The comparator IC will compare the threshold voltage set using the preset (pin2) and the Microphone pin (pin3).

Microphone

The microphone in the Sound sensor module detects the sound. This sound is fed into the LM393 IC.

Preset (Trimmer pot)

Using the onboard preset, you can adjust the threshold (sensitivity) of the digital output.

Using sound sensor 

The sensor has a 4-pin connector with analog and digital output A0 D0 to be attached to the pin of the microcontroller, e.g.an Arduino.