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, March 15, 2017

Boss OD-1 Overdrive

Here's the Boss OD-1–the first of the tube screamer-type overdrives (yes, the first TS wasn't an Ibanez). It features asymmetrical clipping diodes (where a stock TS has symmetrical clipping) which gives it a thicker, more edgy sound. Initial versions of the circuit used a quad opamp, using 2 of the opamps as in the input/output buffers, but this was later replaced by the more common transistor buffers and a dual opamp to save cost and use more readily available parts back in the late 70s/early 80s.


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8 comments:

  1. UnknownMarch 17, 2017 at 12:21 AM

    This one is a classic!

    By the way, would you make a perf layout for Theremin Fuzz from parasitstudio?

    ReplyDelete
  2. BerkicauMarch 17, 2017 at 2:20 PM

    sounds great!! let's verify this one

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  3. IvMNovember 4, 2017 at 11:48 PM

    Mark it as verify :)
    Nice OD!
    I notice a mid to low output on this one...is that normal?

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  4. Effects LayoutsNovember 5, 2017 at 12:03 AM

    Is it below unity?

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    Replies
    1. IvMNovember 5, 2017 at 12:09 AM

      Do you mean compared to the volume when is on bypass? No, but it doesn't boost too much..
      Tested to enter/out before the buffer stages, and have the same output.
      Compared to the BD2, its low.
      Maybe the design?

      Delete
    2. kelsey7kJune 6, 2018 at 11:36 AM

      I know I'm really late on this thread, but you can substitute a 100K pot for the level to get more volume out of it. I think the low output is normal for this circuit.

      Delete
  5. UnknownJuly 6, 2021 at 10:37 AM

    Very good

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  6. moritz4kOctober 4, 2023 at 4:44 AM

    I built it, but there is a strange noise that occurs around half gain and changes depending on the setting.

    ReplyDelete

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