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.
Here's a cool little bass filter pedal designed by bleepboxes. Really low parts count should make for a pretty quick build. Original info here. Might be a good idea to put the 4.7n cap on a switch with a 2.2n for more tonal variation.