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.

Wednesday, March 11, 2015

Devi Ever Improbability Drive

The Improbability Drive is a knob-tweaker's dream–equal parts, overdrive, fuzz, and science experiement, and gets its name from Hitchhiker's Guide to the Galaxy. This one was a bit of a challenge (I even had to use a jumper. Gah!). B3ar over on FSB requested a layout with onboard pots and switches. Couldn't get the switches to fit, but they're only SPSTs so wiring those shouldn't be too much of a hardship. Onboard pots are mounted from the solder-side using right angle PCB mount pots. Should all fit in a 1590B.


  1. This is awesome man, enjoying your blog thorougly and inspired by your great work. Keep it up!

  2. Is the diode exist also in the original one? Thanks for your work!

    1. The diode is there for polarity protection. It's not necessary to the sound of the circuit, but is a good thing to include in case the wrong kind of power supply (like a center positive supply instead of the the standard center negative) is plugged into the pedal.