LCD Horizontal bargraph like one black rectangle

Projects Programming
11

Try this, instead of the previous:

#include <LiquidCrystal.h>    
LiquidCrystal lcd(2, 3, 4, 5, 6, 7); //initialize the library, numbers of the interface pins
int analogInput = 1;     //analog pin A1
unsigned long VoltageIn = 0; // [mV]
int refresh = 50;     //refresh rate

void setup()
{
  pinMode(analogInput, INPUT);  //setting analog pin mode to input
  lcd.begin(16, 2);             //setting up the LCD screens rows and columns
  lcd.print("Voltage=");        
  lcd.setCursor(13, 0); lcd.print('V');
}

void loop()
{
  //value = analogRead(analogInput);  //reading the value on A1
  //VoltageOut = (value * 5.0) / 1024.0;
  //VoltageOut / (R2/(R1+R2));  

  VoltageIn = analogRead(analogInput) * 5000 / 1024; 
  lcd.setCursor(8, 0);              //setting LCD cursor
  lcd.print(int(VoltageIn/1000)); lcd.print('.'); lcd.print(int(VoltageIn/10)%100);

  delay(refresh);                    //screen refresh delay
  voltmetergraph();                //calling my function voltmetergraph 
}

void voltmetergraph()
{ 
  int step=280; // mV
  for(int i=0; i<16; i++)
    {lcd.setCursor(i,0); if(VoltageIn>=step*(i+1) && VoltageIn<step*(i+2)) lcd.write(255); else lcd.print('-');}
}