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.

Tuesday, August 4, 2015

Dunlop Fuzz Face - Eric Johnson

Here's a layout for the Eric Johnson Fuzz Face. Had someone ask if they could build it on the basic Fuzz Face layout from last year. Since there's a few extra components in the EJ version, I thought I'd make a specific layout for it. Should still fit in a 1590a though. Q1 is a BC183 (hfe ~250), and Q2 is a BC183C (hfe ~650). Use the trimmer to bias Q2 to 3v.


  1. Hi man, the diode protection this backwards in the layout.wrong polarity.And the 1uf cap in others layout is NP, not electrolitic.Tomorrow say if it works.thanks!

  2. Replies
    1. Thanks for verifying. Fixed the diode polarity. The polarized cap shouldn't matter much at all tonally. And it's oriented the right way if you do use a polarized cap. I'm just assuming most people have more polarized electros than non-polarized ones.