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, October 16, 2020

Mid-Fi Electronics Random Number Generator

 Happy Fuzz Friday, all! Here's a fun noise maker that should go together pretty easily. Schematic for reference.


  1. Thanks!
    Can we get a higher res pic tho?

  2. I built this with no substitutions and get a bit of randomness, but nowhere near that exhibited in the video. Moreover there's some extraordinary hissing noise, which may be a build problem. I'll give it a second look tomorrow, but thought I'd share my preliminary findings in case anyone else had this issue too.

    1. I'm hoping to get to it in a couple weeks.
      Did you socket the transistors?
      HFE might make a difference. I'm also not sure if using a 2n2222 vs the PN2222 might impact the circuit.

    2. I didn't socket them but I can certainly pull them out and add sockets. I may do just that too. I used MPS2222 by the way which I believe should be the same as pn2222 but I can double check the datasheets.

  3. I am always very grateful for your work.
    May I request a layou?
    I would like to request the layout of marshall gv-2.
    Best regards,

  4. I’m making a lot of pedals using your layout.
    Thank you very much.

    I still can’t master eagle cad.
    Excuse me,can I request a layout?
    It’s two circuits from Jack orman(AMZ).

    •Shaka 5 overdrive
    •Multi fuzz(mini muff)

    I will create it with point wiring,so please create a layout if possible.
    With respect from Japan,Please take care of yourself.

    1. layout:

  5. scheme

  6. can i ask you to build a BOSS harmonist ps-6 layouts? looks like it's very good

  7. Mark this one verified. I used the suggested Q2-Q4, and an S9018 [hFE 97] for Q1. Sounds just like the demo.

    I did modify the layout slightly by reversing the potentiometer so the board sits on its bottom for stability.
    Image link:

  8. Yup. Worked as the video with no substitutions.

  9. Confirmed working from the etch.
    I used:
    Q1: 2N4401
    Q2: 2N222A
    Q3: 2N4401
    Q4: 2N4401

    Sounds just like the sample - like an 80's arcade!