#include <LiquidCrystal.h>

#define pot A0


// declaring LCD pins
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {
  pinMode(pot,INPUT); // pin A0 as Input pin
  
  //Start serial
  Serial.begin(9600);
  
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  
}

void loop() {
  // Read from pin A0
  int reading = analogRead(pot);
  float read = (float)(reading / 1023.0) * 5.00; //analog read gives integer value in range 0-1023 we need to convert to float value in range 0-5 to represent voltage
  
  // Set the cursor to column 0, line 0
  // Note: line 1 is the second row, since counting begins with 0
  lcd.setCursor(0,0);
  
  if ((int)(read*10) %10 ==0) //Logic for checking if there is decimal place in read if no decimal place the decimal is not printed
  {lcd.print((int)read);}
  
  else {lcd.print(read,1);} // If there  is decimal place the read is printed with only one decimal place
  
  lcd.print("V"); //Prints "V" after read prints
  
  // set the cursor to column 0, line 1
  lcd.setCursor(0, 1);
  int star = (read / 5.00) * 16; //converts read in range 0-5 to range 0-16
  
  //prints * in for loop
  for(int i=0;i<star;i++){
    lcd.print("*");
  }
  delay(180);
 
  lcd.clear();
}