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.

Friday, December 2, 2016

OMG Fuzz

Found this design over on DIYSB and thought it would be a good Fuzz Friday layout. The One Mighty Gnarly Fuzz is a pretty straight forward design that you probably have all the parts for in your parts drawer. Check out the DIYSB thread for the schematic, and build notes.

Wednesday, November 30, 2016

PIC Relay Bypass

If you feel like getting into a bit of programing with your pedal building, this is probably a good place to start. The legwork was done and graciously shared by Coda Effects. It uses a PIC micro-controller to trigger a relay and LED indicator. To learn how to program the PIC12F675 read the original blog post on Coda Effects. Benoit has since updated the schematic, adding a photoFET to get rid of a pop that happened when triggered. So you'll need to read and use the code from this post as well. Thanks again to Benoit for sharing his code and all his hard work!

Monday, November 28, 2016

MXR Distortion III

Here's the MXR Distortion III. It's pretty similar to the MXR ZW-44, which itself is a Boss SD-2 clone. The main difference is hard clipping in the Distortion III instead of soft clipping in the ZW-44/SD-2. Originals use an MC33178P dual opamp, but try a JRC4558 or TL072.

Friday, November 25, 2016

CultureJam Stein Fuzz

For Fuzz Friday, here's another one from CultureJam.

The Stein Fuzz is a lightly modified version of the Roger Mayer Stone Fuzz* pedal (which is itself a lightly modified Fuzz Face). The main difference is more standardized part values (the pots mainly). 

It's meant to be a positive ground circuit (center positive, so not daisy chain-able with standard center negative/negative ground effects), but looks like a good candidate to convert to negative ground. The perf side of the layout below reflects the positive ground orientation of parts, and the PCB side reflects negative ground.

Wednesday, November 23, 2016

Demeter Tremulator

Here's a great sounding tremolo circuit from Demeter–the Tremulator. It's an optical trem, using a VTL5C1. That part can be replaced with an LED and a LDR (600Ω on/50M off) combo. Also, the diodes used in the originals are 1N5229 4.3v zenners, though you can use other zenners up to 5.1v. Here's the schematic for reference.

Monday, November 21, 2016

zVex Super Duper 2-in-1

This is a pretty handy expansion of the zVex SHO booster. It stacks two SHOs together and adds a master volume control. This is laid out so the board is vertical in a 1590B oriented like the original.

Friday, November 18, 2016

BearFoot FX Candy Apple Fuzz

For Fuzz Friday, here's the BearFoot FX Candy Apple Fuzz. It's a unique silicon/germanium hybrid designed by Bjorn and it rips. Originals use 2N1308 NPN germanium transistors, but others can be used. Pots are all board mounted and it will fit nicely in a 1590B. Here's the schematic for reference.