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.

Friday, January 9, 2015

Pearl/Vorg Warp Sound

Here's a rare one that came in via the request folder. It's a distortion/filter effect. Used live by guitarist Kevin Sheilds from My Bloody Valentine on "Sometimes," this might be a must-build for shoegazer fans out there.

Here's a demo video of a clone with the 100k trim pot wired externally as a distortion control (which might be a good mod to this circuit.

Not a true-bypass effect–removing the buffer is next to impossible. You can use a SPDT or if you want a LED on/off indicator, use a DPDT.


  1. Replies
    1. There's a typo on my part. Sw3 from the board goes to Sw2 on the switch diagram. Sorry for the confusion.

  2. Does the trimpot control the gain? I'm seeing a few clones of this(like in the video on this post) with a distortion pot. Just wondering if I could wire in an offboard pot instead of the trimmer to do just that?

    1. Oh yeah. I guess you explained that above the video. My bad. Haha. Just ordered the parts to try it. Thanks!