Team SneC Decibel Meter

#include "TM1637.h"
#define CLK 40//pins definitions for TM1637 and can be changed to other ports
#define DIO 39
#define SOUND_SENSOR       24           /* sound sensor pin */          
#define THRESHOLD_VALUE    0.775         /* The threshold to show the reading */

TM1637 tm1637(CLK,DIO);

/* Global Variables */
int sound_value = 0;       /* variable to store the value coming from sound sensor */

void setup() 
{

    
    tm1637.init();
    tm1637.set(BRIGHT_TYPICAL);//BRIGHT_TYPICAL = 2,BRIGHT_DARKEST = 0,BRIGHTEST = 7;
  
}
 
void loop() 
{
    /* read the Sound Sensor value */
    
    sound_value = analogRead(SOUND_SENSOR); 

    /* takes the sound value and converts it to voltage*/
    float voltage = (sound_value * 5)/1024;

    /*checks if the voltage is above the threshold*/
    if (voltage > THRESHOLD_VALUE)
    {
    /* calculates the decibel level from voltage*/
    int decibel = (int) 20 * log(voltage/0.775);
    /* gets each digit of decibel so that it can be displayed*/
    int digit0 = (decibel - (decibel % 1000))/1000;
    int digit1 = ((decibel % 1000) - (decibel % 100))/100;
    int digit2 = ((decibel % 100) - (decibel % 10))/10;
    int digit3 = (decibel % 10);
    /*displaying the decibel's digits on the 4-digit display*/
    tm1637.display(0,digit0);
    tm1637.display(1,digit1);
    tm1637.display(2,digit2);
    tm1637.display(3,digit3);
    /*pause so that the decibel level is readable*/
    delay(175);
    }
    
}