There are a couple 'stages' of the power supply (LM317, LT1206, etc.), so which voltages look off? As far as JP1 and JP3 are concerned, those are there to allow external input if the builder wanted to try supplying the clock and/or PCM179* from a different power supply. A quick look at the...

Howdy R42 = 100R R38 = 75R Sorry about leaving those out. As for the PIC, I've bumped into some issues with it as of late (such as frying my development board accidentally). To be quite honest, I don't expect to have anything done until the holidays. I apologize for all the delay in...

If you like that Maxim chip, check out this chip from the same family (MAX4410). I've already used it in this design (pictures here). I would have to say that I like the sound...it is very detailed and it has no problem driving any headphones I've thrown at it.

Yep (link)...that (at least at this point) appears to be the only board error. It was also mentioned that you need to clip/lift the 'ENABLE' pin of the OPA1632's so don't forget that either.

Here's a pretty basic overview of how to add a new part to the library. The basic premise is that you need to design a symbol (schematic) and a package (layout/board) and then combine those into a device so that when you add a part to your schematic/board, it has an equivalent symbol/package to...

L1 was in the Mouser BOM: 434-01-101JFastron High Reliability Radial RF Chokes As for those other resistors, I think I missed those (oops), so I guess just try and get as close as you can EDIT: The reason I went with Mouser for most of the resistors and capacitors is because they don't...

Yea...that was a custom part. I've gotten fairly good at those in EAGLE Remember...datasheets are your friends

Ahh...thanks 00940...I totally forgot about that one.

I think I may have goofed that one up...I'd say just go with the most recent BOM for any parts/qtys.

Just a couple of things... Has anyone made any progress on their boards? Just curious if the layout is good and the construction is fairly straight forward. Also, the PIC code had finally begun in earnest. The main issue is that the person who is writing the code for me does not have a...

Sorry for the delay, but things have been busy for me as of late. Here are shots of the top and bottom with names and a new BOM that has all the values associated with the names. The BOM spreadsheets for the specific distributors do need to be updated to reflect some changes and also to reflect...

Sorry about that...the labels got so tight in the design, it was going to be impossible to have them on the board and have them be legible. I'm working on putting the board labels into both BOM's and also working on getting the I/V and balanced parts in there as well. I'll post everything as...

The code there is progressing a bit slower than I would like. I would point out though that this only affects the SPDIF portion of the DAC...the USB portion will work just fine (you can use a jumper to hard set it to only use the USB signal). Let me know when you guys get your boards

OK...sorry for the delay on everything as of late. I finally got the boards mailed out as of Thursday this past week. I just bought a house (my first one...yay) about two weeks ago, so things have been hectic and money is going to be a bit tighter, but I hope to start building one of these after...

Quote: Originally Posted by ezkcdude What's wrong with having GND go through vias? It's not a signal line. How else would SMT components connect to internal GND planes in multi-layer boards, anyway? It seems to me your design will be a lot simpler if you dedicate the bottom side to a...