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.

Thursday, September 6, 2018

Devi Ever Dark Boost

Haven't done a Devi circuit in a while, and I keep stumbling across them, so here's the Dark Boost. It's essentially an Electra circuit without the clipping diodes and a Pre-Gain control. Apparently works pretty well on bass too.


  1. Sorry if this is unrelated.

    I have drawn the schematic for Diezel VH4 based on FSB. But it is quite challenging for me to lay it out on a single layer as they are big.

    If you guys want to help with the layout, just mail me at

    Schematic was drawn using Diptrace.

  2. This one also works fine, nice dark sound. Thanks for the layout!

  3. This comment has been removed by the author.

  4. I wonder how this booster work with distortion pedal, I'll make it today and write later here if I am successful

  5. Can I use some replacement instead of mpsa18, also npn/ebc ??

    1. Yeah, anything higher hFE like 2N5089, BC549C or similar should do the trick.

  6. Hey, what's the Electra circuit that's being referenced here?