shweshi · February 28, 2025 14:46 · Feb 28, 2025
diff --git a/hbd_melody.ino b/hbd_melody.ino
@@ -0,0 +1,68 @@
+const int buzzerPin = 15;  // Buzzer connected to GPIO 15
+
+void setup() {
+  pinMode(buzzerPin, OUTPUT);
+}
+
+void loop() {
+  playHappyBirthday();
+  delay(2000);  // Short pause between loops
+}
+
+// Full note definitions (including sharps/flats)
+#define NOTE_C4  262
+#define NOTE_CS4 277
+#define NOTE_D4  294
+#define NOTE_DS4 311
+#define NOTE_E4  330
+#define NOTE_F4  349
+#define NOTE_FS4 370
+#define NOTE_G4  392
+#define NOTE_GS4 415
+#define NOTE_A4  440
+#define NOTE_AS4 466
+#define NOTE_B4  494
+#define NOTE_C5  523
+#define NOTE_REST 0  // Silent pause
+
+// Manual tone generation (works on all boards)
+void playTone(int pin, int frequency, int duration) {
+  if (frequency == NOTE_REST) {
+    delay(duration);  // Rest (silent pause)
+    return;
+  }
+
+  int period = 1000000 / frequency;  // Microseconds per cycle
+  int cycles = (duration * 1000L) / period;  // Total cycles for duration
+
+  for (int i = 0; i < cycles; i++) {
+    digitalWrite(pin, HIGH);
+    delayMicroseconds(period / 2);
+    digitalWrite(pin, LOW);
+    delayMicroseconds(period / 2);
+  }
+}
+
+// Happy Birthday melody
+void playHappyBirthday() {
+  int melody[] = {
+    NOTE_C4, NOTE_C4, NOTE_D4, NOTE_C4, NOTE_F4, NOTE_E4,
+    NOTE_C4, NOTE_C4, NOTE_D4, NOTE_C4, NOTE_G4, NOTE_F4,
+    NOTE_C4, NOTE_C4, NOTE_C5, NOTE_A4, NOTE_F4, NOTE_E4, NOTE_D4,
+    NOTE_AS4, NOTE_AS4, NOTE_A4, NOTE_F4, NOTE_G4, NOTE_F4
+  };
+
+  int durations[] = {
+    500, 250, 750, 750, 750, 1500,
+    500, 250, 750, 750, 750, 1500,
+    500, 250, 750, 750, 750, 750, 1500,
+    500, 250, 750, 750, 750, 1500
+  };
+
+  int length = sizeof(melody) / sizeof(melody[0]);
+
+  for (int i = 0; i < length; i++) {
+    playTone(buzzerPin, melody[i], durations[i]);
+    delay(50);  // Short pause between notes
+  }
+}