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.

Friday, October 12, 2018

DAM Buzzotron

For Fuzz Friday, here's the D*A*M Buzzotron with a few modifications (based on H.A.'s suggestions).The Buzzotron is a tweaked Burns Buzzaround, which can also be built on this layout. What I've added is a master volume control and a ICL7660-based voltage inverter. This allows you to power the effect with a standard +9v supply and use PNP germanium transistors like the originals. Here's the Buzzotron and Buzzaround schematics for reference.

And if you're interested in building the original Buzzaround populate the board like this:


  1. Thanks! The demo video for that makes this one sound pretty killer.

    Just when I thought I was good with my fuzz projects...

  2. Thank you very much. If only I could spend you a beer for that. Going to build this pretty soon.

  3. I prefer the buzz-alike because.. you only need one transistor and it sounds the same (to me).

  4. Never had luck with the buzz-alike. Didn't clean as nicely as the discret version und always was too gated.
    BTW: You can tag this verified. BUT: You really need to activate the freq. boost function of the 7660s to raise the switching to 35kHz. Without you can hear the 10kHz whining in the background. I simply jumpered pin 1 and 8 for that.

  5. Why are two 10k resistors connected to the collector circuit q1 and q2? = 5k is it intentionally?