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, April 20, 2016

Grab & GoGo Delay/Overdrive

Here's a cool little dual effect designed by Allesz over on FSB. I actually laid this out a long time ago, but couldn't wrap my head around the switching with the buffer. I've learned a lot since then and feel confident in my understanding to publish this one here. It essentially is a basic PT2399 delay with 2 of the pins from the PT2399 being used as a separate soft clipping overdrive. A simple buffer, built around the MPSA13, is always on, making this a non-true bypass effect. But a little buffering never hurt anyone ;) The original schematic and discussion can be found here.

Since there's a lot of off board wiring going on with this one, here's a full off board wiring diagram to help clarify.


  1. This board wiring diagraam looks awesome)

  2. Replies
    1. There's a sound clip in the FSB thread.

  3. Hi! I just want to say thank you for your work and for this nice webpage

  4. Help, I have built as such to the diagram and not envuentro the fault does not give me a signal, only hum without activating: that could be the detail.