int pwmSin[] = 
{127,110, 94, 78, 64, 50, 37, 26,
  17, 10,  4,  1,  0,  1,  4, 10,
  17, 26, 37, 50, 64, 78, 94,110,
 127,144,160,176,191,204,217,228,
 237,244,250,253,254,253,250,244,
 237,228,217,204,191,176,160,144
};

void setup()
{
  pinMode(13, OUTPUT);
  pinMode(9, OUTPUT);
  
}

int val=0;
int sinVal;

void loop()
{
  val = pwmSin[sinVal];
  analogWrite(9,val);
  digitalWrite(13, HIGH);
  sinVal+=1;
  if (sinVal==48) sinVal=0;
  delay(10);
  digitalWrite(13, LOW);
  
}