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, October 5, 2021

Stompbox Converter

 Had a couple questions about stompbox use with line level, so I drew up this. This allows you to drop the line level signal down to instrument level, send it out to whichever stompboxes you want to use, then back and amplified back up to line level. Schematic and discussion here. Made two versions, one that could be run off typical +9v pedal power, and another for bi-polar 12v supply used in Eurorack synths, so you can build it either in pedal form or Eurorack module form.


  1. this looks great but im wondering if this would correctly match impendence going from line level to instrument level?

  2. Can it be use as a amplifier loop?

  3. Thanks for another layout!

    Any chance of you making one of the PAL800?

  4. Please M800 pedal pcb!!!

    Thank you Bro!!!

  5. Is it possible to only make use of one of the circuits? So if i have a line level signal and want to convert it to instrument level? Or having an instrument level signal that i wanna convert into line level?