Relay

 

void setup()

{

  pinMode(2, OUTPUT);

}

void loop()

{

  digitalWrite(2, HIGH);

  delay(1000); // Wait for 1000 millisecond(s)

  digitalWrite(2, LOW);

  delay(1000); // Wait for 1000 millisecond(s)

}

void setup()

{

  pinMode(A0, INPUT);

  Serial.begin(9600);

  pinMode(12, OUTPUT);

}

void loop()

{

  Serial.println(analogRead(A0));

  if (analogRead(A0) < 500) {

    digitalWrite(12, HIGH);

    Serial.println("LED HIGH");

  } else {

    digitalWrite(12, LOW);

    Serial.println("LED LOW");

  }

  delay(10); // Delay a little bit to improve simulation performance

}