Coin Detector and Amount Counter

/*
  COIN DETECTOR amount counter USING INTERRUPT
  DETEECT THE COIN USING INFRARED LED
  INTERRUPT PINS ARE CONNECTED TO THE CATHODE OF IR Recivers
  USING ARDUINO MEGA 2560
*/

#include <LiquidCrystal.h>


LiquidCrystal lcd(30, 32, 34, 31, 33, 35, 37);
const byte interruptPin1 = 21;
const byte interruptPin2 = 18;
const byte interruptPin3 = 19;
const byte interruptPin4 = 20;
const byte interruptPin5 = 3;
volatile int value10 = 0;
volatile int value5 = 0;
volatile int value1 = 0;
volatile int valueswitch = 0;
volatile int countOne = 0 ;
volatile int countFive = 0;
volatile int countTen = 0;
volatile int TOTAL=0;
void setup() {
  pinMode(interruptPin1, INPUT_PULLUP);
  pinMode(interruptPin2, INPUT_PULLUP);
  pinMode(interruptPin3, INPUT_PULLUP);
  pinMode(interruptPin4, INPUT_PULLUP);
  pinMode(interruptPin5, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(interruptPin1), coinOne , RISING);
  attachInterrupt(digitalPinToInterrupt(interruptPin2), coinFive , RISING);
  attachInterrupt(digitalPinToInterrupt(interruptPin3), coinTen , RISING);
  attachInterrupt(digitalPinToInterrupt(interruptPin4), show_1_5, RISING);
  attachInterrupt(digitalPinToInterrupt(interruptPin5), show_10, RISING);
  lcd.begin(16, 2);
  
  lcd.print("COIN DETECTOR &");
  lcd.setCursor(1, 1);
  lcd.print("AMOUNT COUNT");
  delay(1200);
  delay(1200);
  delay(1200);
  
  lcd.begin(16, 2);
  lcd.print("INSERT THE COIN");


  Serial.begin(9600);
  Serial.println(" ");
  Serial.print("COIN DETECTOR , SORT & AMOUNT COUNTER ");
}

void loop() {


  delay(2000);
  lcd.begin(16, 2);
  lcd.print("INSERT THE COIN");


}

/*

  INTERRUPT SERVICE ROUTINE

*/

void coinTen() {
  countTen++;
  value10 = (countTen * 10);
  Serial.println("\n");
  Serial.println(" 10Rs coin = \r ");
  Serial.print(value10);
  Serial.print("Rs");
  Serial.println("\n");


}
void coinFive() {
  countFive++;
  value5 = (countFive * 5);
  Serial.println("\n");
  Serial.println(" 5Rs coin = \r ");
  Serial.print(value5);
  Serial.print("Rs");

}

void coinOne() {
  countOne++;
  value1 = (countOne);
  Serial.println("\n");
  Serial.println(" 1Rs coin = \r ");
  Serial.print(value1);
  Serial.print("Rs");
}
void show_1_5()
{
  Serial.println("\n");
  Serial.println("Number of 1Rs coins =  \r ");
  Serial.print(countOne);
  Serial.println("\n");
  Serial.println("TOTAL 1Rs COINS =  \r ");
  Serial.print(value1);
  Serial.print("Rs");
  Serial.println("\n");
  Serial.println("Number of 5Rs coins =  \r ");
  Serial.print(countFive);
  Serial.println("\n");
  Serial.println("TOTAL Rs COINS =  \r ");
  Serial.print(value5);
  Serial.print("Rs");
  //coin of one Rs
  lcd.begin(16, 2);
  lcd.print("1Rs coin= ");
  lcd.setCursor(11, 0);
  lcd.print(value1);
  // coin of five Rs
  lcd.setCursor(0, 1);
  lcd.print("5Rs coin =");
  lcd.setCursor(11, 1);
  lcd.print(value5);

}
void show_10()
{
  Serial.println("\n");
  Serial.println("Number of 10Rs coins =  \r ");
  Serial.print(countTen);
  Serial.println("\n");
  Serial.println("TOTAL 10Rs COINS =  \r ");
  Serial.print(value10);
  Serial.print("Rs");
  //coin of 10Rs
  lcd.begin(16, 2);
  lcd.print("1Rs coin= ");
  lcd.setCursor(11, 0);
  lcd.print(value10);
  //TOTAL AMOUNT
  TOTAL=(value1+value5+value10);
  lcd.setCursor(0, 1);
  lcd.print("TOTAL =");
  lcd.setCursor(11, 1);
  lcd.print(TOTAL);
   Serial.println("\n");
  Serial.println("TOTAL AMOUNT =  \r ");
  Serial.print(TOTAL);
  Serial.print("Rs");
}