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, November 29, 2019


Happy Black Fuzz Friday, everyone! Be sure to check out the store for a bunch of new boards and a 15% off Black Friday sale. Use coupon code "blackfuzzfriday" at checkout.

Here's a cool silicon Buzzaround variant I found browsing DIYSB. Any low hFE transistors should work ok. 2N2222A, 2N2369, MPSA42, etc. Should fit nicely in a 1590B.

Tuesday, November 26, 2019

Cornish SS-3 Soft Sustain

This just got traced by Aion and he was kind enough to share the schematic along with a cool tracing journal on his blog. As to what the SS-3 is, it's like a beefed up Cornish G-2, which is his take on the Distortion+. The original uses 2, single op amps, but for the sake of space and simplicity I've used a single dual op amp. It'll be tight, but it should fit in a 1590B. Like all Cornish pedals, it's designed with buffered bypass so the FSw labels on the layout refer to a DPDT footswitch. If wiring for true bypass, ignore those labels (and the 51k and 91Ω resistors at the bottom right corner of the board). But if you want to build it like the original, wire the in/out jacks to the in/out pads, one side of a DPDT footswitch to the FSw pads, and the other side for the on/off LED indicator.

Thursday, November 21, 2019

Revv G4

This one was actually pretty easy to knock out after doing the G3. Slightly simpler and with less clipping than the G3, it's got loads of gain on tap. This also has the same pot layout as the the G3, so just use that drill template.

Tuesday, November 19, 2019

Revv G3

You guys super pestered me to do this one, so here it is. Now get off my back! 😄 Layout turned out fairly big, but not overly so. It should fit nicely in a 1590BB.

Friday, November 15, 2019

Dusky Electronics Hypatia

For Fuzz Friday this week I give you the Dusky Electronics Hypatia. It's based on the Bazz Fuss, but with a whole lot more control added gain stages and buffers. Should fit nicely in a 1590B. Here's the schematic for reference.

Tuesday, November 12, 2019

Morula Auto Wah

Here's a simple auto wah circuit with a pretty low parts count I thought was interesting. Not a lot out there on it, but it uses a single CD4049UBE to create an LFO and wah audio path. The depth of the effect is controlled by the LFO. Should fit nicely in a 1590B. Here's the schematic for reference.

Thursday, November 7, 2019

Keeley Mag Echo

Here's Keeley's PT2399-based delay that aims to emulate old tape delays. I think it's the first delay on the blog with built in modulation. It's laid out with board mounted pots for a 125B enclosure with top mounted jacks. FYI, the trimmer controls the gain of the input stage.

Tuesday, November 5, 2019

HexeFX Night Train OD

Came across this circuit and thought it was interesting. It's similar to the Tube Sound OD with added input and output buffers, plus gain and tone controls. Info, schematic and sound clip available here.

Friday, November 1, 2019

Fulltone Mas Malo

For Fuzz Friday, here's Fulltone's take on the Big Muff. The main differences over a regular BMP is the input and output stages. The input stage has it's own gain control and the output stage is a JFET-based gain circuit. Also the volume control has been moved immediately after the tone stack, with the output stage after the volume pot. Schematic for reference.