 #define EXTERNAL_LED_PIN 5
 #define ACTIVATION_STATIC_PIN 7
 #define IGNITION_STATIC_PIN 8
+#define COIL_INTERRUPT_PIN 11
 #define INTERNAL_LED_PIN 13
 #define FREQUENCY_PIN A0
 

  //Set Static Pins
  digitalWrite(ACTIVATION_STATIC_PIN, activeState);
  digitalWrite(IGNITION_STATIC_PIN, LOW);
  
  active = isActive();
  dischargeCoil();

  pinMode(TACH_PIN, INPUT);
  pinMode(IGNITION_PIN, OUTPUT);
  pinMode(IGNITION_STATIC_PIN, OUTPUT);
  pinMode(COIL_INTERRUPT_PIN, OUTPUT);
  pinMode(FREQUENCY_PIN, INPUT);
  pinMode(INTERNAL_LED_PIN, OUTPUT);
  pinMode(EXTERNAL_LED_PIN, OUTPUT);
