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.

Monday, January 19, 2015

Fairfield Circuitry Barbershop Overdrive

This one was a request. Two pots onboard and one offboard. The Barbershop Overdrive is a transparent overdrive/booster with medium gain. It has the expected Volume and Drive controls, but also has a Sag control which alters the voltage the pedal is running at. This can change the color and compression of the tone.


I did a little research, and found out Q4 is just a fancy way of doing polarity protection and can be omitted if you want. Here's a layout without it.


  1. Working!
    Jfets need's to be biased to 6/6,5v at D :-)

    David; possible to add trimmers instead 8k2 and 9k1 resistors?
    Thanks..! as always

    1. Nice! I added trimmers to the 1590A layout I did of this one.

    2. Saw them! Just don't want to lose the board mounted pots :D
      Thanks again!

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