int batMonPin = A3;    // input pin for the divider
int val = 0;       // variable for the A/D value
 int reference = A4;    // input pin for the reference via 5v regulator


void setup()
{


  pinMode(13,OUTPUT);  // out put to the relay


}

void loop()
{
 val = analogRead(batMonPin);    // read the voltage on the divider



     if ( analogRead(batMonPin) == analogRead(reference))  // This is to  check  weather the batt is fully charged



  {
    digitalWrite(13,HIGH); // stop charging the batt
  }


  else


  {

    digitalWrite(13,LOW); // Contiune to charge the batt

  }

}