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, June 9, 2015

Mid-Fi Electronics Demo Tape Fuzz

Here's a pretty unique fuzz from Mid-Fi. Built around a dual opamp, the Demo Tape Fuzz recreates the sound of a guitar being played directly into an old 4-track cassette deck. It features a 2-band EQ in addition to the Volume and Trim (gain) controls. I've laid it out for board mounted right angle PCB pots mounted from the solder side.


  1. Is LM4558N the same to JRC4558?
    What would be the best to replace it?

  2. Such a cool circuit, I want to build one again. Your layout looks perfect.

    I wonder how it'd sound with switchable diodes in the feedback loop... :)

    1. no encunetro el LM4558, por cual otro puedo reemplazar ??

    2. Any 4558 should work. JRC, TJM, KIA, etc.