Interface Sound Detection Sensor with Arduino

Introduction

The sound sensor module is an excellent way to detect sound levels and can be used in various projects, such as sound-activated lights or alarms. It typically includes a microphone and an analog output that corresponds to the sound level detected. This guide will show you how to set up a sound sensor with Arduino to read sound levels.

Required Components

• Arduino Board (e.g., Arduino Uno)
• Sound Sensor
• LED
• Jumper Wires
• Breadboard (optional)

Pinout

Circuit Diagram / Wiring

• SOUND SENSOR
  • SOUND SENSOR VCC → 5V (Arduino)
  • SOUND SENSOR GND → GND (Arduino)
  • SOUND SENSOR AO (Analog Output)  → Pin A0 (Arduino)
• LED
  • Connect the longer leg (anode) of the LED to digital pin 13 through a 220-ohm resistor.
  • Connect the shorter leg (cathode) to the GND pin.

Programming With Arduino

• Copy and paste the provided code into a new sketch in the Arduino IDE:

  const int LED = 13;
  const int Sensor = A0;

  int level;
  const int threshold = 640;

  void setup()
  {
  pinMode (LED, OUTPUT);
  Serial.begin(9600);
  }

  void loop() {
  level = analogRead(Sensor);
  if (level > threshold)
  {
  digitalWrite (LED, HIGH);
  delay (1000);
  digitalWrite (LED, LOW);
  }
  else
  {
  digitalWrite(LED, LOW);
  }
  }

Explanation

• The sensor reads analog values from pin A0.
• A threshold level of 640 is set to detect high values (this can be adjusted).
• The LED on pin 13 turns on for 1 second when the sensor reading exceeds the threshold.
• A potentiometer can be used to adjust the threshold sensitivity to detect sound levels more or less easily.

Testing and Troubleshooting

• Check Connections: Ensure that the wiring is correct, and the sensor is receiving power.
• Adjust Sensitivity: If available, use the onboard potentiometer to adjust the sensitivity of the sound sensor to suit your project needs.