Arduino Sound Sensor

Introduction

Simple sound sensor; output True or False.

Code 1. The simple

Tutorial page: https://arduinogetstarted.com/tutorials/arduino-sound-sensor

#define SENSOR_PIN 7

int lastState = HIGH;  // the previous state from the input pin
int currentState;      // the current reading from the input pin

void setup() {
  Serial.begin(9600);
  pinMode(SENSOR_PIN, INPUT);
}

void loop() {
  currentState = digitalRead(SENSOR_PIN);
  if (currentState){
     Serial.println( currentState );
  }else{
     Serial.print("Schii");
  }

}

Code 1

Turn on the one more LED if the sound is strong enough.

#include <FastLED.h>

#define SENSOR_PIN 7
#define NUM_LEDS 10
#define LED_PIN 5

int soundState = HIGH;  // the previous state from the input pin
int numLeds = 0;
CRGB leds[NUM_LEDS];


void setup() {
  Serial.begin(9600);
  pinMode(SENSOR_PIN, INPUT);
  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(20);
}

void loop() {
  soundState = digitalRead(SENSOR_PIN);
  if (soundState){
    numLeds++;
  }

  for (int i=0; i<min( numLeds, NUM_LEDS); i++){
    leds[i] = CRGB::Green;
    FastLED.show();
  }

  if (soundState){
    Serial.println("");
     Serial.println( soundState );
  }else{
     Serial.print("Schii");
  }

}