There's no single repository of schematics that is not without wheat and chaff.
Original stuff is harder to eek out, most original stuff is found in singles or small clusters — not a repository/depository.
Certainly you may be already familiar with some if not most of the following,
and you've already mentioned DIYstompboxes.com and ROG, but to aggregate for those unfamiliar, there's also:
tracing pedals since 2007
www.freestompboxes.org
Search out Tim Escobedo's collection of projects, if you haven't already. Great stuff to breadboard and some you'll want to build into an enclosure, too. There's a lot of dead links for his stuff, but eventually you'll come across his whole collection. Hit me up if you can't track the collection down, I may be able to help.
Parasit Studio is a recording studio and diy stompbox resource with vero layouts and original designs
www.parasitstudio.se
Vero layouts, but some schematics to be had here, too:
Collection of vero (stripboard) & tagboard layouts for 100s of popular guitar effects, with over 1000 verified designs. DIY your own boutique effects!
tagboardeffects.blogspot.com
Perf, but often links to the schematic are included (mostly linked back to FSB mentioned above):
This is a library of perfboard and single-sided PCB effect layouts for guitar and bass for pedal building enthusiasts.
effectslayouts.blogspot.com
Click on "Pedals" here:
Guitar Pedal Circuits, Amplifier Analysis, Chip Internal Schematics, Modifications, PCBs,effects study, frequency response and stompboxes
www.electrosmash.com
Gauss Markov was a great resource, but is alas gone. Some of the info is still found scattered around the Net, though.
Jack Orman's
blog and his AMZ website are great reads.
RG Keen's an icon:
GGG is always worth a click (breadboard/build all the Dan Armstrong stuff!):
www.generalguitargadgets.com
COMPARE SUBTELTIES:
Grey vs Mustard DOD 250
Black vs Tan Ross dirt (and indeed, compare with the DOD 250 and MXR DIST+ and Armstrong Blue Clipper etc etc)
Have a look at the BASS stuff. A lot of it sounds great on other instruments as well and/or can be tweaked to taste. For example the BazzFuss (Check out Hemmo's other circuits, too BTW, not just the Bazz Fuss) or compare the differences between the ubiquitous EHX Boost LPB-1 and the "Bass" version the EHX Hog's Foot/Mole — what happens when you use the Mole's cap values for the LPB-1 BUT skip the added-on caps of the Mole?
REVERSE ENGINEER!
Got a layout for an effect but can't find the schematic? Make your own schematic from the layout! This is a great exercise and I've learned a lot by doing it. Especially good here on the PPCB forum where a new PCB will drop before the schematic and build doc is ready. I've had to make my own schematics from a couple PCBs I didn't have build docs for — a year after I got the PCBs (ironically within a day or so after I made the schematic the build-doc finally dropped — 'twasn't PPCB, BTW). Lots of stuff to reverse from aforementioned sites Tagboard (vero) and Effects Layouts (perf), but also check out
https://dirtboxlayouts.blogspot.com/, there's a few there that don't have schematics posted though most do.
There's a few more smaller sites of projects/schematics from the nooks and crannies of the Web that are rattling around in the nooks and crannies of my computer's HD, as well as the nooks and crannies in my grey matter — I'll try to remember to post them here whenever they momentarily surface from the N&C ethers to be dusted off...
