int num1 =0;;  
const int PWM = 3; 
void setup()
{
Serial.begin(9600); 
pinMode(3,OUTPUT);
Serial.println("Enter Value to write (60-195)"); TCCR2B = (TCCR2B & 0xF8) | 0x01;// timer frequency is 4khz
TCCR2A = _BV(COM2A1) | _BV(COM2B1) | _BV(WGM20);
  TCCR2B = _BV(CS22);
  OCR2A = 180;
  OCR2B = 50;
}

void loop() 
{ 
  while(Serial.available()>0)
  { 
  num1= Serial.parseInt();    
  Serial.println("Entered value is "); 
  analogWrite(PWM, num1);
  delay(200);
   }
    analogWrite(PWM, 0);
    Serial.println("Executing."); 
    delay(200);
  }

//****** Receiver side calibration******//
//The program works for values from 60 to 195 
//25% and 75% of duty cycle which is approx, 1.25V to 3.75V