Tracker Movie Prop

// Potentiometer-controlled LED + Piezo
// Pot wiper → A0
// LED (+ 220Ω resistor) → Pin 9
// Piezo (+) → Pin 8


const int POT_PIN   = A2;
const int LED_PIN   = 8;
const int PIEZO_PIN = 6;


// Blink/beep interval range (ms)
const int MIN_INTERVAL = 50;   // fastest (pot at max)
const int MAX_INTERVAL = 1000; // slowest (pot at min)


void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(PIEZO_PIN, OUTPUT);
}


void loop() {
  int potVal  = analogRead(POT_PIN);           // 0–1023
  int interval = map(potVal, 0, 1023, MAX_INTERVAL, MIN_INTERVAL);


  // Flash LED
  digitalWrite(LED_PIN, HIGH);


  // Beep piezo (frequency also rises with pot)
  int freq = map(potVal, 0, 1023, 200, 2000);
  tone(PIEZO_PIN, freq, interval / 2);         // beep for half the interval


  delay(interval / 2);


  // Off phase
  digitalWrite(LED_PIN, LOW);
  noTone(PIEZO_PIN);


  delay(interval / 2);
}