How to Make a Conveyor Belt System

Block Diagram :-

Circuit Diagram :-

Code :-

 
//Prateek 
//www.prateeks.in
//https://youtu.be/LA65y0QgLNQ
  
#include "LiquidCrystal.h"
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
int irPin = 6;
int count1 = 0;
int irPin2 = 5;
int count2 = 0;
boolean state = true;
boolean state1 = true;

void setup()
{
  Serial.begin(9600);
  lcd.begin(16, 2);
  pinMode(irPin, INPUT);
   lcd.setCursor(0, 0);
  lcd.print(" Hi Welcome To");
  lcd.setCursor(0,1);
  lcd.print("JustDoElectronics");
  delay(2000);
  lcd.setCursor(0, 0);
  lcd.print("Counter Machine");
   lcd.setCursor(0, 1);
  lcd.print("...............");
  delay(2000);
  lcd.clear();
}
void loop()
{
  if (!digitalRead(irPin) && state) {
    count1++;
    state = false;

    lcd.setCursor(0, 0);
    Serial.print("Large Bottle: ");
    lcd.print("Total Bottle:");
    Serial.println(count1);
    lcd.setCursor(14, 0);
    lcd.print(count1);
    delay(100);
  }
  if (digitalRead(irPin))
  {
    state = true;
    delay(100);
  }
    if (!digitalRead(irPin2) && state) {
    count2++;
    state1 = false;

    lcd.setCursor(0, 1);
    Serial.print("Large Bottle: ");
    lcd.print("Small Bottle:");
    Serial.println(count2);
    lcd.setCursor(14, 1);
    lcd.print(count2);
    delay(100);
  }
  if (digitalRead(irPin2))
  {
    state1 = true;
    delay(100);
  }
}

Video