// Flashing Light Prize (3) Arduino Scat
// pkvi
// Sound Detector Pins
#define PIN_GATE_IN 2
#define IRQ_GATE_IN  0
#define PIN_LED_OUT 13
#define PIN_ANALOG_IN A0
// Relay Pin
int relay = 7;
// Sound Value
int val;
// SparkFun Sound Detector Interrupt
void soundISR()
{
  int pin_val;
  pin_val = digitalRead(PIN_GATE_IN);
  digitalWrite(PIN_LED_OUT, pin_val);
}
void setup()
{
  // Testing
  Serial.begin(9600);
  // Sound Detector Pin Assignment
  pinMode(PIN_LED_OUT, OUTPUT);
  pinMode(PIN_GATE_IN, INPUT);
  // Relay Pin Assignment
  pinMode(relay, OUTPUT);
  // Sound Decector Interrupt
  attachInterrupt(IRQ_GATE_IN, soundISR, CHANGE);
}
void loop()
{
  // Read Sound
  val = analogRead(PIN_ANALOG_IN);
  // Testing
  Serial.println(val);
  // If Sound Exceeds X
  if (val > 55) {
    digitalWrite(relay, HIGH);
    delay(600);
    digitalWrite(relay, LOW);
    delay(200);
  } else {
    digitalWrite(relay, LOW);
  }
  delay(10);
}