// Program by R. J. Kreindler, Dec 2017
//  to turn lamp on with loud sound

// Identify analog sensor pin
#define ANALOGPIN A1
// Identify relay switch pin
#define RELAYSWITCHPIN 3
// Set the time for lamp 'on'
int delay1 = 5000;

void setup() {
  // Set relay input pin for output
  pinMode(RELAYSWITCHPIN, OUTPUT);
  // Set sound sensor analog pin for input    
  pinMode(ANALOGPIN, INPUT);
} // End setup

void loop() {
  int soundVol = analogRead(ANALOGPIN);
  if(soundVol > 40) {
  // Write a LOW to the relay switch pin
  //  that is, turn the relay on
  digitalWrite(RELAYSWITCHPIN, LOW);
  delay(delay1);
  } // End if
  else {
  // Write a HIGH to the relay switch pin
  //  that is, turn the relay off 
  digitalWrite(RELAYSWITCHPIN, HIGH);
  } //End else
  // Turn relay off at the end of loop
  digitalWrite(RELAYSWITCHPIN, HIGH);
} // End loop