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NovaTech Engineerics
Big Sound Sensor
Availability: In Stock
Condition: New
5 in stock
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The sound sensor – large.

  • Main chip: LM393, Electret condenser microphone

  • Working voltage: DC 4-6V

  • Signal output indication

  • Single-channel signal output

  • The output effective signal is a low level

  • When there is sound, outputs low level and the signal light

  • Can be used for Acoustic control light, give sound and light alarm working with Photosensitive sensor , and sound control, sound detect

  • Circuit board output switch quantity

  • Note: The Maximum induction distance is 0.

Application Example

// to turn lamp on with loud sound

// Identify analog sensor pin

#define ANALOGPIN A1

// Identify relay switch pin


// Set the time for lamp ‘on’

int delay1 = 5000;

void setup() {

// Set relay input pin for output


// Set sound sensor analog pin for input


} // End setup

void loop() {

int soundVol = analogRead(ANALOGPIN);

if(soundVol > 40) {

// Write a LOW to the relay switch pin

// that is, turn the relay on



} // End if

else {

// Write a HIGH to the relay switch pin

// that is, turn the relay off


} // End else

// Turn relay off at the end of loop


} // End loop

Please note that the sound sensor has a sensitivity potentiometer; the blue component in the attached pictures. A closeup of that component is provided in the pictures. Thus, the value used to determine a ‘loud’ sound, 40, is likely different from the value you will find and use. The value you will make a comparison against will depend on your sensitivity adjustment.

You may also choose to use the DO, digital output, rather than the AO, analog output.

In this example, a sound sensor is used. Alternatively, you may want to use a passive infrared sensor (PIR), or a light sensor, water sensor, etc. You can “read” the output of whatever sensor you select to activate the relay and its attached device. The attached device, obviously, does not have to be a fan or lamp, e.g., it could be an alarm, radio, coffee maker, toaster, motor, television, etc.

Technical Details:

Seller SKU: 16
Minimum order quantity: 1
Date first listed on Novatech: Aug 24, 2020

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