The build uses an Arduino, an MP3 chip, a SD card, LCD screen, amplifier, and two speakers. Everything is then packed into a small repurposed box with buttons and a volume knob. The end result is ...

For display there is a set of retro LED seven-segment modules, and an MSGEQ7 spectrum analyser. The result is a modern radio with FM, line-input, and MP3 player, with all the functions you’d expect.

Sony's NWZ-A720, A820 and A820K Walkman players all look alike, but the 8-series has added Bluetooth to sweeten the deal. It's quite similar to their ...