Water Experiment

Water Experiment

int frequencyInHz = 51;
int led = 13; 
float restTime = (1/frequencyInHz) * 1000;;

void setup() {
  // put your setup code here, to run once:
  pinMode(led, OUTPUT); // Configure the pin for OUTPUT so you can turn on the LED
  tone(8, frequencyInHz);
}

void loop() {
  // put your main code here, to run repeatedly: 
  delay(restTime);
  digitalWrite(led, LOW);
  delay(restTime); 
  digitalWrite(led,HIGH);
}