Tutorial

1. List of parts:
   
   Arduino Uno Board
   
   Arduino Microphone similar to this one here
   
   LCD Screen Compatible with Hitachi HD44780 driver
   
   10 K Potentiometer
   
   2 500 Ohm resistors
   
   2 LEDs
   
   A Breadboard
   
   A large number of jumper cables
   
   
2. Assembly:
   For the LCD refer to this guide it is not nesscary to use the last two pins on the LCD board
   
   in wiring the LEDs go from the D9 port on the arduino, go through one of the 500 ohm resistors, connect to the positive end of the LED and connect the negative end to the GND on the arduino board
   
   For the Microphone connect VCC to 3.3V on the arduino board, connect OUT to A0 and connect GND to GND
   
   
3. To operate the code you need to download the clock library from here, This is necessary to run the clock functions
   
4. Code:

START CODE:

#include <LiquidCrystal.h> //LCD Library
#include <Time.h> // The clock Library
#include <Wire.h> // Used in conjuction with the LCD library
LiquidCrystal lcd(12, 11, 5, 4, 3, 2); // setting up the LCD
int countertotal=0; //global variable
int timessetoff=0; //global variable
void setup() { //setup
  Serial.begin(9600); //some more setup
  pinMode(9,OUTPUT); //setting up the pins
  pinMode(8,OUTPUT); //setting up the pins
  lcd.begin(16, 2); //lcd number of rows and spaces

}

void loop() { //primary loop
  time_t t=now(); //starting the clock
  lcd.setCursor(0,1); //LCD position one on row one
  lcd.print(hour(t)); //print the hours since it started
  lcd.setCursor(3,1); //go to the m position
  lcd.print(minute(t)); //print the minutes
  lcd.setCursor(6,1); //go to the seconds position
  lcd.print(second(t)); //print the seconds
  int soundinput = 0; //for the mike
  int counter = 0; // iterating increasing variable for counter
  for (int timer0=0; timer0 < 5000; timer0++){ // the figure after the first semicolon "timer0 < #" the # is the timer counter, it does not actually count time but iterations of checking the counter function
    soundinput = analogRead(A0); // for the mike
    lcd.setCursor(0, 0); //set to first position first row
    lcd.print(soundinput); //prints the current sound input
    lcd.setCursor(5,0); //goes to next position
    lcd.print(countertotal); //prints the total times that the counter has been set off
    lcd.setCursor(8,0); //goes to the next position
    lcd.print(timessetoff); //prints the number of times that the alarm has been activated
    if (soundinput > 500){ //checks the sensor // the number here is the volume needed to trigger the counter
       lcd.clear(); //clears the LCD screen
       lcd.setCursor(0,1); //sets the cursor to the first position on the first row
       lcd.print(counter); //prints the number of times the counter has been set off in the current trigger cycle
       lcd.setCursor(6,1); //goes to the next position
       lcd.print("Counting");//alerts the user that the trigger cycle is activated
       timessetoff=timessetoff+1; //adds to the total counter
      digitalWrite(9, HIGH); // turns on the LED
      counter=counter+1; //adds to counter iterator
      delay(100); // this is the delay between readings the number here is in milliseconds
      digitalWrite(9, LOW); // turns off the LED
      timer0=0;//resets the timer for this timer cycle
      }
     delay(1); //delay for stability
  if (counter>10){ //how many times the counter function needs to trigger to turn on the "alert" led
  lcd.clear(); //clears the LCD
  lcd.print("ALARM"); //Prtints the alarm
    digitalWrite(8, HIGH); // Turns on the LED
    delay(10000); // how long the alert lasts
    digitalWrite(8, LOW); // Turns off the LED
    counter=0; //Resets the counter
    timer0=5000; //resets the timer
    countertotal=countertotal+1; //adds one to the total number of alarm set off
  }
  }
  lcd.clear();
}


END CODE
           5. Calibrations:
Calibrate the function by editing the number of times the counter needs to be set off and how long the timer should run, the timer is measured in number of iterations of the function rather than actual time elapsed so it can be freely edited without impacting the function.

To calibrate the microphone use a small screwdriver to adjust the screw on the back of the microphone. This changes the gain which can make it more or less sensitive to noises.