I built a headphone amp and DAC today. Both are designs from AMB Labs.
Here’s the amp:
Here’s the DAC:
So now, I can get the digital optical signal out of my Mac Pro, convert it to an analog signal, and amplify it with a nice portable but powerful amp. Woohoo! I’m liking this DIY electronics stuff quite a bit at the moment. It’s not quite as brute force a project as the bike building, but it’s not nearly as messy either. One more project to go… details to come.