/*LED BAR GRAPH PROJECT USING ARDUINO UNO BY HASEEB ELECTRONICS 
 * youtube channel 
 */
#include <LiquidCrystal_I2C.h>
#include <Wire.h>
LiquidCrystal_I2C lcd(0x27, 16,2);
byte block[] = {B11111,B11111,B11111,B11111,B11111,B11111,B11111,B11111};
 
int potIn = A0; //input analog signal
void setup() {
  // put your setup code here, to run once:
  pinMode(potIn,INPUT);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  lcd.init();
  lcd.backlight();
  lcd.createChar(0, block);
  lcd.home();
  lcd.write(0);
}

void loop() {
  // put your main code here, to run repeatedly:
  int potVal  = analogRead(potIn);
  float volatgeValue =(5.0/1023)*potVal;
  lcd.setCursor(0,1);
  lcd.print("VOLTGAE ");
  lcd.print(volatgeValue);
  //-------------- LED CONTROL---------------
  if(volatgeValue>=0.25){
    digitalWrite(2,HIGH);
    lcd.setCursor(0,0);
    lcd.write(block);
    }
  else{
    digitalWrite(2,LOW);
    lcd.setCursor(0,0);
    lcd.print(" ");
    }
    
  if(volatgeValue>=0.75){
    digitalWrite(3,HIGH);
    lcd.setCursor(1,0);
    lcd.write(block);
    }
  else{
    digitalWrite(3,LOW);
    lcd.setCursor(1,0);
    lcd.print(" ");
    }
    
if(volatgeValue>=1.25){
    digitalWrite(4,HIGH);
    lcd.setCursor(2,0);
    lcd.write(block);
    }
  else{
    digitalWrite(4,LOW);
    lcd.setCursor(2,0);
    lcd.print(" ");
    }
    if(volatgeValue>=1.75){
    digitalWrite(5,HIGH);
    lcd.setCursor(3,0);
    lcd.write(block);
    }
  else{
    digitalWrite(5,LOW);
    lcd.setCursor(3,0);
    lcd.print(" ");
    }
  if(volatgeValue>=2.25){
    digitalWrite(6,HIGH);
    lcd.setCursor(4,0);
    lcd.write(block);
    }
  else{
    digitalWrite(6,LOW);
    lcd.setCursor(4,0);
    lcd.print(" ");
    }    
if(volatgeValue>=2.75){
    digitalWrite(7,HIGH);
    lcd.setCursor(5,0);
    lcd.write(block);
    }
  else{
    digitalWrite(7,LOW);
    lcd.setCursor(5,0);
    lcd.print(" ");
  }
  if(volatgeValue>=3.25){
    digitalWrite(8,HIGH);
    lcd.setCursor(6,0);
    lcd.write(block);
    }
  else{
    digitalWrite(8,LOW);
    lcd.setCursor(6,0);
    lcd.print(" ");
     }
  if(volatgeValue>=3.75){
    digitalWrite(9,HIGH);
    lcd.setCursor(7,0);
    lcd.write(block);
    }
  else{
    digitalWrite(9,LOW);
    lcd.setCursor(7,0);
    lcd.print(" ");
    }   
  if(volatgeValue>=4.25){
    digitalWrite(10,HIGH);
    lcd.setCursor(8,0);
    lcd.write(block);
    }
  else{
    digitalWrite(10,LOW);
    lcd.setCursor(8,0);
    lcd.print(" ");
    }  
  if(volatgeValue>=4.95){
    digitalWrite(11,HIGH);
    lcd.setCursor(9,0);
    lcd.write(block);
    }
  else{
    digitalWrite(11,LOW);
    lcd.setCursor(9,0);
    lcd.print(" ");
    }
}