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.


  1. This one is a classic!

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

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

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

  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?

    2. 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.