If it is not clear from the schematic, the jack at the left is for a center-tapped transformer, and there are multiple SIL headers for output power.
I've built it on a protoboard and it seems to work, but I had a few questions I was hoping someone might be able to answer:
1) Do I really need the protection diodes D1/D2/D3/D4? As far as I can tell this comes from an old app note from the 1970's to protect the regulators, but modern 78xx/79xx regulators are pretty indestructible and I don't see these in many other designs, so can those be removed?
2) Can I tie AGND and DGND together? It seems like I should, but I didn't see that in the MB-808 PSU so I thought I should double-check.
3) What's the purpose of D5? It was on the MB-808 but I wasn't sure of its purpose. I'm guessing it helps prevent some sort of current flow between the 5V and +/-12V sections?
Thanks for any insights!
Oh and BTW I know I can probably buy something off-the-shelf that would work for me, but I wanted to make my own circuit board in Eagle and get it made (at BatchPCB). It's been fun so far. Once the design is proven, I can post the .sch and .brd files. I could probably be talked into a mini-bulk order for PCBs if enough people are interested.