This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Thursday, June 16, 2022

Greer Amps Soma 63 Preamp

Cool JFET preamp circuit from Greer. Its supposed to sound like a Brownface-era Fender amp. I'd be curious what it sounds like without the transformer. Should fit just fine in a 125B with top mounted jacks. Schematic for reference.




Wednesday, May 25, 2022

Earthquaker Devices Special Cranker

Here's EQD's newest offering, the Special Cranker. Developed from the Speaker Cranker, this one is like two basic Electra's with switchable hard clipping diodes in between (1N60Ps like the original Speaker Cranker or Soviet germanium D9Ks). Easy fit for a 1590B.

Here's the schematic for reference.



Normally I throw a demo in, but just go look those up on YouTube, there's a bunch of them. I leave you with this vid instead. It's waay cooler anyway.


Friday, May 13, 2022

Darkglass Duality Fuzz

 Happy Fuzz Friday! Here's a big one that hopefully makes up for my absence lately. Sounds great on bass and guitar. From Darkglass:

The Duality is a unique fuzz pedal that contains two discrete fuzz circuits—a gated saw-tooth wave and a raunchy high-gain sound—which can be mixed together to yield a vast selection of distinct sonic textures.




Friday, February 4, 2022

Not A Muff

Happy Fuzz Friday, all! Recently I got a request for the new EQD Hizumitas. Found a schematic for it over on FSB and it's just a BMP. The values are tweaked, but the topology is the exact same as a standard Muff. If you've hung around here for really any length of time you know how many times I've laid out the BMP. There are so many clones out there dating back to the early 70s, most of which I haven't really explored here on the blog. So using Kit Rae's fantastic Big Muff site, I put together a BOM of 6 versions of non-muffs, including the Hizumitas and the Elk Sustainar the Hizumitas is derived from. So for your building and experimenting pleasure, here's the Not A Muff. (BOM, schematic and drilling templates linked below)



Also, if you're interested in how I laid out this board, I did a livestream over on YouTube. I've been trying to do a couple streams a month of just chilling and doing some layout work in Eagle. So go and sub and all that nonsense.

Thursday, January 13, 2022

Fulltone 2B

 Happy 2022, everyone! Here's a buffer/booster from Fulltone. Engaged it's a booster with an interesting controllable germanium soft clipping setup, and when bypassed the diodes and gain control are shorted, creating a buffer. If you're just after the boost and want to skip the buffered bypass, just ignore the two Bypass pads and wire it normally. The original uses a 3PDT still for bypass, but you should be able to get away with a DPDT (just wire the bypass pads to lugs 1 and 2 of a DPDT, LED- to lug 4 and lug 5 to ground). Discussion and schematic over on FSB.






Friday, December 3, 2021

Devi Ever Hounds Tooth

 Haven't had a Fuzz Friday since March, so sneak one more into 2021 with the Devi Ever Hounds Tooth. It's essentially Devi's 05 clean boost into a Dark Boost with extra PNP transistors stacked onto the NPNs. 




Thursday, November 11, 2021

MI Audio Blues Boy Deluxe

 Stumbled across the schematic for this one over on FSB and it seemed interesting enough. Should be able to squeeze it into a 1590B.