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, July 13, 2016

Smallsound/Bigsound Mini

Here's a pretty versatile and unique overdrive from Smallsound/Bigsound. The designer, Brian, was kind enough to share his schematic over on FSB, so a big thanks to him! I've laid this out for board mounted pots and added trimmers to help bias Q1 and Q3. I posted the layout on FSB and JohnK has already verified it, so thanks John!


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9 comments:

  1. JiomySeptember 15, 2017 at 10:05 AM

    Hello, i have the circuit ready for the test , though i cant find the diode that calls for.Is the 5158 the correct diode? Is there a replacement for it? Thanks in advance

    ReplyDelete
    Replies
    1. Effects LayoutsSeptember 15, 2017 at 10:16 AM

      You can use a 4001, 5817, or even a 4148 there. It's just the polarity protection diode.

      Delete
  2. UnknownOctober 26, 2017 at 2:10 PM

    I only have the 3362 trimpots with the "triangular" pinout. Does orientation of the trimpot matter? Or no, since they are linear?

    ReplyDelete
  3. BoukmanMarch 12, 2021 at 2:48 AM

    Hi!Just wanted to point out a few mistakes in the layout.1:The 10n next to 220n i think is 1n.2:The bottom 1k is shown in the last row.3:the reverse underside of the base on the 5089 is wrong somewhere,and 4: After the 10ohm resistor again on the underside.Thanks!!!

    ReplyDelete
    Replies
    1. BoukmanMarch 12, 2021 at 2:48 AM

      On 4 its after the diode sorry..

      Delete
    2. sportslord999000August 18, 2023 at 6:36 AM

      Hey, did you manage to get the circuit working after making these changes?

      Delete
  4. NOCAugust 6, 2022 at 6:34 PM

    This comment has been removed by the author.

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  5. NOCAugust 6, 2022 at 6:48 PM

    Working a few bugs out of this circuit. Should Bias 2 and 3 be connected? And also as stated above the 10nf should be a 1nf.

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