Retro Bluetooth turntable

Authors: LUKA KOLAC

Menthor: MATO BRIZAR

School: Faust Vrančić Mechanical Engineering Technical School

Country: CROATIA

e-mail: mato.brizar@gmail.com

A custom-made retro Bluetooth turntable that blends the classic aesthetic of vinyl records with modern technology. The device supports three playback speeds (33⅓, 45, and 78 RPM) and features built-in speakers as well as Bluetooth connectivity for wireless music playback. Its compact housing is 3D-printed, achieving an authentic look combined with a lightweight design. The device merges the mechanical precision of an analog audio player with the capabilities of modern electronics, including automatic audio output switching, Bluetooth reception, and digital control logic. The technical section provides a detailed description of each subsystem, ranging from the power supply and drive mechanism to the audio signal chain and control logic. The prototype is a functional, single-channel (mono) audio device that plays vinyl records at standard speeds, automatically detects when headphones are plugged in to reroute the signal, and offers the option of Bluetooth audio streaming from a smartphone—all housed within a single 3D-printed enclosure.