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, June 21, 2024

Reeves Electro Zo:

Stumbled across this one I though would be a quick Fuzz Friday layout. It's a modified Zonk 2 with silicon transistors. Originals use NOS 2N3416, but other low hFe (150-200) BJTs should work just fine (2N2222, 2N5550, etc). Laid it out so the board would be vertical in the enclosure with the pots attaching to either side of the board. Schematic for reference.

Monday, June 10, 2024

Black Cat OD-1

 Did this one quite a while ago, but wanted to redo some of the old layouts with board mounted pots. The schematic online has the topology correct but the 100nF caps are 47nF from the gut shots I've seen, so that's reflected below. Might be good to socket and experiment with.

Friday, April 26, 2024

EQD Fuzz Master General

 Happy Fuzz Friday! Here's a Univox Super Fuzz derived circuit from Earthquaker. Should squeeze into a 1590B just fine. Here's the schematic for reference:

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. 

Thursday, September 28, 2023

Greer Amps Black Mountian

 Here's one of Greer's latest offerings. Seems like a simplified OCD circuit with some value changes and different clipping diodes. Schematic for reference. Easy fit in a 1590B.

Friday, August 4, 2023

JPTR FX Silver Machine

Happy Fuzz Friday, folks! Stumbled across this one recently and looked cool. It's basically 2 SHOs in series pushing a Green Ringer. Schematic for reference. Should fit nicely in a 1590B. I've also got a fabricated version in the store.

Tuesday, June 20, 2023

Exar OD-2

 Here's a fairly unique OD from the mid-nineties and the Polish pedal manufacture Exar Electronix. It's a soft clipping drive based around a simple discrete opamp topography. Originals have J113 JFETs, but others should work just fine. More info on FSB.