Introduction

This experiment demonstrates how to control a device, like an LED, using a clap sound detected by a microphone sensor.

Components Needed

• Microphone Sensor
• LED
• Arduino (e.g., Uno, Nano)
• 220-ohm Resistor
• Jumper wires

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Circuit Setup

1. Connect the microphone sensor to the 5V pin and GND on the Arduino.
2. Connect the output pin of the microphone sensor to a digital input pin (e.g., D2) on the Arduino.
3. Connect the anode of the LED to pin 13 and the cathode to GND through a 220-ohm resistor.

Ensure the microphone sensor is placed where it can detect the sound of a clap.

Code for Clap Switch Circuit

Upload the following code to your Arduino to toggle the LED when a clap is detected:

const int micPin = 2;   // Pin connected to the microphone sensor
const int ledPin = 13;  // Pin connected to the LED
int micValue = 0;

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(micPin, INPUT);
}

void loop() {
  micValue = digitalRead(micPin);
  if (micValue == HIGH) {
    digitalWrite(ledPin, HIGH);  // Turn LED on
  } else {
    digitalWrite(ledPin, LOW);   // Turn LED off
  }
}
            

Explanation

The microphone sensor detects sound. When a loud sound, like a clap, is detected, the LED turns on. Otherwise, it stays off.

Troubleshooting

• If the LED does not respond, check the wiring and ensure the microphone sensor is connected to the correct pin.
• If the sensor is too sensitive or not sensitive enough, adjust its sensitivity settings (if available).