ESP32 Mini Music Box (OLED Display + 3 Buttons + Buzzer)

Three buttons, a buzzer and five classic tunes: a pocket music box built with an **ESP32**! The **0.96 inch OLED** shows a playlist, and the previous, play/pause and next **buttons** move between Ode to Joy, Für Elise, Jingle Bells, Happy Birthday and Twinkle Twinkle. While a tune plays, the note name appears and its key lights up on a two-octave **piano keyboard**, with elapsed time and a progress bar. All tunes are public domain, played on a **passive buzzer**.