Based on an idea of a German company called Siemens & Halske I build a music player of different kind. The basic idea of Siemens was, to build a modular radio system where the customer was able to buy one component after each other.
The original radio system was build 1924 and it has three bus systems.
I adapted this idea and build a modular Volumio player.
In the middle the main component
Raspberry with touch display
128 GByte Memory
Right hand side from the main unit the DAC with VU - meters
Left hand side from the main unit a measurement unit for the main voltages
And two active speakers 35 W class D
The D-Train Volumio player has three bus systems as well:
USB - BUS
Power BUS (+5, +12, +24)
All connected on the front by the copper bridges.
Detailed photos can be found at http://salon.clockworker.de/forum/topics/ein-d-zug-oder-ein-etwas-anderer-mp3-spieler
Have Fun everybody