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.

Tuesday, November 14, 2023

1981 Inventions LVL

Here's the new boost from Matt Hoopes. Cornish buffer up front, so like the DRV, not a true bypass effect unless you want to wire it that way. Signal is then amplified by half of a 1458 op amp, and then back to back inverting and tone shaping op amp stages with the LM833. Schematic below. If you're going to wire it for true bypass you can omit C4, and R7-8. Also note that D1-2 aren't acting as clipping diodes, but as (I think?) a limiter to prevent clipping or at least too much of it. 


  1. D1 and D2 are Zener diodes in a clipping arrangement. When Zener diodes are opposed in series, they clip just like inverse parallel planar diodes, but you have more options due to the different voltage ratings of Zeners.

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  3. Awesome thanks! Can I make a request? I'm very interested in the EHX Analogizer. I can't find a schematic for it. I imagine it's some kind of boost tone bender thing.

  4. Make us the ARCHANGEL layout
    Below is the verified scheme.