button.fade.speaker.ino

//create variables for pins
const int buttonPin = 2;
const int ledPin =  12;
const int fadeLed = 11;
const int potPin = 0;
const int lightPin = 1;

//timecode
unsigned long previousMillis = 0;
const long interval = 10; 
// LED fading variables
boolean fadeUp = true;
int fadeLevel = 0;
//LED blinking variables
int ledState = LOW;
//button variables
int buttonState = 0;
boolean pressed = false;
//analog sensor variables
int lightVar = 0;
int potVar = 0;

void setup() {
  // set up pins
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT);
  pinMode(fadeLed, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  // read the state of the pushbutton value:
 buttonState = digitalRead(buttonPin);

  if (buttonState == HIGH && pressed == false ) { //if it is pressed now but was not pressed last loop
    delay(5);
  //  Serial.println("BANG!");
    // toggle lED:
    if (ledState == LOW) {
      ledState = HIGH;
    }
    else {
      ledState = LOW;
    }
    pressed = true; //change this so we know the button was pressed
  }

  if (buttonState == LOW && pressed == true ) { //if the button is no longer pressed but was pressed last loop
    delay(5);
    pressed = false; //change this so we know it is no longer pressed
  } 



unsigned long currentMillis = millis();

//check sensors
  potVar = analogRead(potPin);
  lightVar = analogRead(lightPin);

//logic
if (lightVar <= potVar ){
  fadeUp = true;
}
  else { 
  fadeUp = false;}
  
//write to the LED pins
if (currentMillis - previousMillis >= interval) {
  previousMillis = currentMillis;
  
if (fadeUp == true ) { 
  if (fadeLevel != 255) fadeLevel++;
} else {
  if (fadeLevel != 0) fadeLevel --;
}
}
//Serial.println(fadeLevel/4);
   digitalWrite(ledPin, ledState);
   analogWrite(fadeLed,fadeLevel);
   Serial.println(lightVar);
   int sensorReading = analogRead(A0);
  // print the sensor reading so you know its range
  Serial.println(sensorReading);
  // map the analog input range (in this case, 400 - 1000 from the photoresistor)
  // to the output pitch range (120 - 1500Hz)
  // change the minimum and maximum input numbers below
  // depending on the range your sensor's giving:
  int thisPitch = map(sensorReading, 400, 700, 620, 800);

  // play the pitch:
  tone(9, thisPitch, 1000);
  delay(1);        // delay in between reads for stability
}