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.

Monday, February 20, 2017

Earthquaker Devices Black Eye

Here's a nice little MOSFET-based clean boost that EQD used to make. It's actually pretty similar to the Lovepedal Delux 60. Here's the schematic for reference.




Friday, February 17, 2017

D*A*M/Emanating Fist Black Dust

For Fuzz Friday here's another take on the classic Colorsound One-Knob Fuzz by Emanating Fist Electronics (a sister company of D*A*M). It's fairly similar to the D*A*M Meathead, but with a few value changes. Here's the schematic:


Note that in earlier versions of this circuit, R4 is replaced by a 20k trim pot. So the value there may need to be tweaked.



Wednesday, February 15, 2017

Barber Silver LTD

Here's a cool variation of a buffer-less Tube Screamer with a BMP-style tone stack in the middle. There are also several trimmers that control the Presence, Bass, and Mids, and they'd be pretty easy to wire off board if you wanted the controls externally. If you want to go with the stock configuration, it should fit nicely in a 1590B. Here's the schematic for reference.


Monday, February 13, 2017

Electro Harmonix Soul Preacher

There have been a few different iterations of the Soul Preacher. This one follows the version that isn't based around an OTA chip (much like a DynaComp), but is rather much closer to an Orange Squeezer. The original used a buffered bypass, and I've included an extra pad for the buffer out if you want to build it that way. Here's the schematic for reference.

Friday, February 10, 2017

Black Arts Toneworks Black Sheep

A biker fuzz if ever there was one. This week's Fuzz Friday layout is the Black Sheep from Black Arts Toneworks. It's great on both guitar and bass and features 3 stacked gain stages with a 4 position switch dictating the input capacitor. Here's the schematic for reference.



Wednesday, February 8, 2017

Fulltone RTO

The RTO (or Robin Trower Overdrive) from Fulltone is a modified Tube Screamer circuit. The input buffer is removed and the soft clipping stage has an interesting mix of diodes.




For a drilling template, use the Cmat Mods Signa.

Monday, February 6, 2017

Wren & Cuff Phat Phuk B

The Phat Phuk is a boost from Wren & Cuff that combines a JFET stage with a germanium transistor stage. This got traced over on the Tagboard Forum and the original that was traced was the B version. From Wren & Cuff:

Here’s what the Phat Phuk is: A germanium/JFET booster. A unique sounding pedal which adds a beautiful sheen to your bass’ top end and a bit of grit to the overall tone. It’s a fantastic pedal for situations where you want a lift in your overall level, during a chorus or bridge for example, with a bit of bawdy bump via the germanium transistor.

The exact germanium transistor is a Chinese PNP on the originals, but others can be used. Shoot for around 90 hFE. On originals there is a trimmer that is essentially a gain control. I've laid it out so that you have the option for a trimmer or external board mounted pot on the same board. So if you want the pot externally, don't populate the trimmer and vise versa. Here's the schematic for reference.