Sound module

(1 customer review)

R21.22 inc VAT

21 in stock

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SKU: sou-300 Category: Tag:

This small breakout board couples a small microphone with a 100x opamp to amplify the sounds of voice, door knocks, etc loud enough to be picked up by a micro controllers Analog to Digital converter. Unit comes fully assembled as shown.

Arduino microphone sound detection sensor module

High sensitivity

Two outputs: 1. AO, analog output, real-time output of the microphone voltage signal

2. DO, digital output when the sound intensity reaches a threshold

Sensitivity potentiometer adjustable

Use DC 5V power supply

Power indicator LED

Pin layout: 1. Analog 2. Ground 3. + 4. Digital

void setup()
  Serial.begin(9600); // open serial port, set the baud rate to 9600 bps
void loop()
      int val;
      val=analogRead(0);   //connect mic sensor to Analog 0
      Serial.println(val,DEC);//print the sound value to serial       

1 review for Sound module

  1. niel1

    Since the AO is not amplified, it’s pretty useless without external circuitry.

    You can trick the module into amplifying the microphone signal by simply adding a 100k feedback resistor between A0 and DO. D0 is now the applified microphone signal. Adjust the potentiometer until DO outputs 2.5v. Connect DO to your analog pin for reading. There is no filter on the module, so the signal is a bit noisy, but it’s usable.

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