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, March 16, 2018

Os Mutantes Fuzz

Got a request for this one and thought it'd be a good Fuzz Friday layout. It's got a fair amount of treble and grit on tap and should fit pretty easily in a 1590a. Schematic here.


  1. Verified. Just finished it up. Interested to see what other folks find with this one - mine is just slightly under unity gain when activated, haven't had time yet to debug.

    1. Dang, Peter... you are a pedal building mo-sheen!

  2. Sub the 22k for a 25k trimmer and adjust to taste. Fixed the unity gain...and then some...

  3. No problem...You could use a 20k or anything close for that matter. 25k is just what i had laying around.

  4. build it, breadboarding with 2n2222 metal can, hfe176 on Q1 and Q2 152, bias q2 collector with 10k trimmer set around 8k [2.1v] to get sweet spot, input cap used 10nf for fatty granule gain on my set, ready to box up this little beast, thanks for the layout~

  5. Hi there, finally, I Combined my Mutantes fuzz with the Craig Anderton Super Tone Control, short clips here: