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.


5 comments:

  1. This one is a classic!

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

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  2. sounds great!! let's verify this one

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

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  4. Replies
    1. 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?

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