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, July 26, 2017

DeadAstronaut Chasm Reverb

Been a while since I did a reverb layout and this DeadAstronaut design does not disappoint. It's not a true-bypass effect, but uses some JFET switching so that tails are present when you turn the effect off. Coda Effects actually has a really good write up on the design. Ended up doing this one in Eagle and was able to squeeze it into a 125B. If you want a fabricated board, you can order some off OshPark.

Here's the build doc with the BOM, schematic, and drill template.


  1. What do you need to confirm? ))) I made a circuit, everything works, I just changed the values of C8 and C9 put 22nF both, (trying to move the oscillation to the high-frequency region area). Due to this, we had to reduce the values of R11 and R12 to 33k and 68k.

    1. Did you bread board this or did you build it on this board?

    2. I apologize for my English))) I'm building it on this board. Slightly changing the nominal values.

    3. You're English is fine. When someone verifies something so fast I'm always a little blown away. haha Thanks for verifying!

  2. I have the ability to speed up the build process. Since, I am engaged in repair and modification of guitar effects and amplifiers. I have the equipment, details and experience. )). The reason for rapid assembly and debugging. I want to say that you are very logical and repeatable PCB`s. You make a very interesting and useful site, with a wonderful set of schemes and recipes.