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.

Tuesday, June 12, 2018

Optical Bypass

Here's another alternative to the 3PDT for bypass wiring. It's based on the method VooDoo Lab uses for bypass and uses a optocoupler to achieve true bypass using a DPDT. I've drawn up 2 different layouts for this: a standard perf/PCB layout, as well as another PCB I did in Eagle with the footswitch board mounted. There are extra pads so the compact or the larger DPDT footswitch can be used, as well as an extra pad for the resistor so 1/8th or 1/4th watt can be used.

Note, in the board mounted footswitch version In/Out pads refer to the jacks, and Send/Return refer to the effect in/out.


  1. Very cool. Does this require a latching or momentary switch to work properly? I'm guessing latching, due to lack of PIC.

  2. I've wondered why you'd choose this over say... a millenium bypass. H11F1s aren't cheap!

  3. what software did you use in making pcb?

    1. if you read description for the second pcb he used eagle. for the other diylc, you can look at his useful videos

  4. Thanks man. Great job. Do you have a good tutorial for eagle? Link please, if possible ;-)