For most people, the MiniDisc is just one of countless media formats that became obsolete when music went online. Not so for MiniDisc enthusiasts, many of whom still use MiniDisc decks at home and MiniDisc Walkmans on the go. Unfortunately, high-end headphones these days often only come with Bluetooth connectivity, necessitating the use of clunky signal converters that ruin the neat compactness of those portable players. [Daniel Rojas] The Sony MZ-R500 MiniDisc cleverly solved this problem by adding Bluetooth functionality directly to the Walkman.
MiniDisc Walkmans are famously compact devices, so adding a complete circuit board to one was not easy. [Daniel] Managed to squeeze out the PCB from a Scosche wireless audio transmitter on the front of the Walkman, next to the control buttons. He connected the audio signal to the transmitter’s input and used the “End Search” button to become the “Pair” button. Sadly, the recording head and some associated hardware had to be removed to make room for the new component, reducing the Walkman to a playback device only.
Lots of fly wire and kapton tape, but it all fits.
The project’s GitHub page includes a detailed walk-through of the modification process that should enable anyone to reproduce the end result. [Daniel] The optimal solution is not arrived at at once, however, and he describes three major modifications of his project in separate sections. For example in the first iteration, the Bluetooth module interfered with the audio signal, which [Daniel] Solved by adding an isolation transformer in version two. He also includes a page full of technical information he gathered during his project, which will be useful for performing other modifications on your MiniDisc Walkman.
We’ve seen a number of impressive projects where Bluetooth interfaces were added to pre-Bluetooth gadgets, from tube radios to 8-track players. Some, like the iPod Nano, are more space-constrained than the MiniDisc Walkman.
