void setup() {
  pinMode(26, INPUT);
  pinMode(2, OUTPUT);
}

void loop() {
  int v = analogRead(26);
  Serial.println(v);
  int intensity = map(v,0,4095,0,255);
  Serial.println("The Value Of Intensity:"+String(intensity));
  analogWrite(2,intensity);
  Serial.println("The Value of Intensity:"+String(intensity));
  if(intensity>130)
  {
    digitalWrite(2, HIGH);
    Serial.println("Relay is high voltage");
  }
  else
  {
    digitalWrite(2, LOW);
    Serial.println("Relay is High Voltage");
  }
}