void loop(){
   CurrentVoltage = analogRead(analogInput);
   if(fabs(CurrentVoltage - PreviousVoltage) < 5 ) CurrentVoltage=PreviousVoltage;
   vout = (CurrentVoltage * 5.0) / 1024.0;
   vin = vout / (R2/(R1+R2));
   lcd.setCursor(0, 1);
   lcd.print("INPUT V= ");
   lcd.print(vin,3);
   delay(1000);
   PreviousVoltage = CurrentVoltage;
}