const int sensor = 13;
int valor = 0;
int estado = LOW;
const int rele = 12;

void setup() {
  pinMode(sensor, INPUT);
  pinMode(rele, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  valor = digitalRead(sensor);
  if(valor == HIGH){
     Serial.println(valor);
     digitalWrite(rele, HIGH);
     delay(500);
  }else{
    digitalWrite(rele,LOW);
  }

}