i'd like to introduce my HiFiBerry implementation, which is my first project with a single-board computer. It's a music player to stream music from the network to my old hi-fi system. It consists of a Raspberry Pi B+ with a HiFiBerry DAC+. The OS is a stock Raspbian with a MPD server running on it.
The aim wasn't to increase the quality of the audio signal, since i think the HiFiBerry already sounds great. Besides, i don't have a clue of how to design a low noise PSU. Instead, the focus was laid on the construction of a small wooden case with a simple design. The greatest effort was to achieve an acceptable accuracy, because i don't own a CNC milling machine, but only a woodworking router.
I'd be glad if some of you like it, or if i could give suggestions for your own projects.
HiFiBerry DAC+ with wooden case