int pref [4]={100, 510, 850, 900};
class LDR {
  int pines, pin_adc, niveles, *Niv;

public:
  LDR(int adc, int n, int* REF) {
    pin_adc = adc;
    niveles = n;
    Niv = new int[n];
    Niv = REF; 
    
  }

  void config(int salidas) {
    pines = salidas;


    for (int i = 0; i < niveles; i++) {
      pinMode(pines + i, OUTPUT); 
    }
  }

  float leer_adc() {
    delay(100);
    return analogRead(pin_adc) * 4.88E-3;
  }

  void Nivel(float adc) {
    for (int i = 0; i < niveles; i++) {
      if (adc <= Niv[i] * 4.88E-3) {
        digitalWrite(pines + i, LOW);
      }
    }
  }

  void Desnivel(float adc) {
    for (int i = 0; i < niveles; i++) {
      if (adc > Niv[i] * 4.88E-3) {
        digitalWrite(pines + i, HIGH);
      }
    }
  }
};

LDR L(A0, 4, pref);

void setup() {
  L.config(6);
}

void loop() {
  float H = L.leer_adc();
  L.Nivel(H);
  L.Desnivel(H);
}