// name: Analog Read
// purpose: to show how analog input works using codes
// commentary: Part 2 of Lab_5
// author: Karl Edward Sarmiento
// ID#: 101143058
// ip/domain: MIT

int analog_in = A5;                        // potientiometer voltage adjuster
int val = 0;                               // to acquire the reading of adc from analog input
int interval = 100;                        // the delay value given to the interval
int button_value;
int button_pin = 7;

void 
setup() 
{
  Serial.begin(9600);
  pinMode(button_pin, INPUT_PULLUP);
  pinMode(23, OUTPUT);                     // buzzer
}

void 
loop() 
{
  button_value = digitalRead(button_pin);
  if (button_value == 0)
  {
    val = analogRead(analog_in);
    val = map(val, 0, 1023, 100, 1000);    // scale values
    tone(23, val);                         // starts the tone
    delay (interval);                      // shows the frequency number for 100 milliseconds
    Serial.println(val);                   // prints the frequency
  }
  else {
    noTone(23);                            // stops the tone 
  }
}