Korg DST-1/Yamaha DI-01 Distortion

I stumbled across the schematic for this effect and thought it was another variation of the Marshall Bluesbreaker circuit. But realized it actually predates the Marshall circuit by several years. Korg made a re-labeled version for Yamaha, the DI-01, and both still fetch decent prices. Apparently they were built like tanks. Sounds pretty decent too. Not sure what clipping diodes were used, but 1N4148s are probably a good place to start. Easy fit in a 1590B.

Pink Jimi Photon 'Weetie Pi

Here's a really cool and versatile dirt pedal design by Pink Jimi Photon. He's made a lot of contributions to the DIY community and whips up some cool stuff. Check this thread on FSB for the schematic and Jimi's description of the circuit.

BJF Bone Bender

Happy Fuzz Friday! As requested, here's Bjorn's Bone Bender. Lots of great info and schematic in this doc. Should fit nicely in a 1590B.

Menatone Ms. Foxy Brown

Another Marshall-in-a-box, the Ms. Foxy Brown uses 3 J201s and feels a lot like an older Run Off Groove design (though it's not). As per usual, you'll need to bias the J201s to about 4.5v and then fine tune as needed. Should fit easily in a 1590B. Schematic for reference.

Square Wave Oscillator

Came across this Instructable the other day and thought it would be a good addition to the library. Would be a good first step into the synth world and apparently plays nice with guitar pedals. Already built it myself and it works great, and fits nicely in a 1590G.

 

Lovepedal Zendrive 2

The Zendrive 2 is a big box version of the Zendrive, using a 12AX7 internally. Sadly the tube is only being used for clipping, replacing the BAT41 and 1N34a diodes in the small box Zendrive. But according to reliable sources, it sound very good, with some harmonic mojo happening. Other than the tube clipping, there's only a few value changes from the small box version. Schematic for reference.

zVex Machine

Happy Fuzz Friday! Not sure how I haven't laid this one out before. Think of it like a mashup of a SHO and Tim Escobedo's Tripple Fuzz, and then repeated. Here's the schematic for reference. This one was drawn up based on an early 2000s model and the input SHO section I've modified to the newer version with a single 9.1v zener to protect the MOSFET instead of 2, 1N4148s in the layout below. I also added a pulldown resistor at the output (cuz I couldn't make it fit at the input lol). The 2 clipping diodes aren't known, other than they are large blue glass diodes with the markings "BKC" written on them, so socket and experiment.