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, July 21, 2017

Greaser Fuzz

Here's a cool little fuzz designed by Nocentelli over of FSB. It's based on the D*A*M GB-83, which is a silicon adaptation of the Tone Bender Mk. III (sans the tone control). Definitely worth building up. Here's the schematic for reference (you'll have to login to FSB to access).

Wednesday, July 19, 2017

Earthquaker Devices Chrysalis

Another oldie but goodie from EQD. The Chrysalis (now discontinued) is essentially a Speaker Cranker (with a pre-gain control instead of its normal gain control) into a Rat-style tone control, followed by a LPB-1 for gain recovery. Schematic can be found on FSB.

Monday, July 17, 2017

Lovepedal Dover Drive

Here's a pretty interesting overdrive from Lovepedal (Hermida). The signal goes through a dual PNP silicon transistor stage (don't worry, it's still a negative ground effect), then into a op amp gain stage with soft clipping in the feedback loop, with a Rat-style tone control, followed by an output buffer. Schematic can be found on FSB for reference.

Friday, July 14, 2017

Parasit Studios Eagle Claw

Fuzz Friday! Freppo over at Parasit Studios makes some insanely cool stuff. Here's his Eagle Claw octave fuzz. You can probably squeeze it into a 1590a if you're feeling adventurous. In his own words:

The Eagle Claw is simple yet brutal, noisy and glitchy sounding CMOS-based fuzz with a full wave rectifier to produce a strong octave up. This circuit works best with high output pickups. It is a gated circuit by nature of the CMOS logic. If you are using single coils and need more sustain, try a boost or compressor in front. To bring out the strongest octave up, use the neck pickup on your guitar with the tone rolled down. The octave is most intense around the 10th fret and higher.

Wednesday, July 12, 2017

iRig Preamp

Got several requests for this one. Basically, it's small preamp to plug into a mobile device for use with apps like iRig. Pretty simple circuit. Shouldn't be hard to fit in a 1590a or even smaller since you don't need to include a footswitch.

Monday, July 10, 2017

AMZ Son of Screamer

Where would DIY pedal building be without Jack Orman? Got a request for his Son of Screamer, which is a pretty standard Tube Screamer but with the input and output buffers removed. Pots are board mounted and I added a extra diode in the feedback loop for asymmetrical clipping if you want to go that route. Original schematic and article can be found here.

If you want to have symmetrical clipping, populate the diodes like this:

Friday, July 7, 2017

Höfner Buzz Tone

Pretty unique fuzz box from Höfner for Fuzz Friday. Pretty straight forward 3-transistor design that should make for a pretty easy build. Board mounted pots for less off-board wiring and if you want a bit more gain, replace the 47uF input cap on the left side of the board with a 22uF cap. Here's the schematic for reference.

Wednesday, July 5, 2017

Zombie Chorus

Got a request for this one. This was originally designed by John Hollis and has since been modified by various folks in the DIY community. Like the latest version of the Little Angel chorus, it has a switch to do either vibrato or chorus tones. And the Mode switch allows for different speeds (Leslie, Normal, and Clone). Here's the schematic for reference.

Monday, July 3, 2017

Keeler Push

Here's a recent trace from over on FSB. It reminds me of a Timmy with a fixed bass control and modified second op amp stage. Nice alternative to a Tube Screamer.

Friday, June 30, 2017

Emanating Fist XB-70

The XB-70 is a clone of the Captain's personal '77(?) Guild Foxy Lady, which were built by Electro Harmonix and generally very similar to Ram's Head Big Muffs. In the Captain's own words, "It sounds like torn leather soaked in piss and salt smushed lovingly into ears... It is a brute of a pedal, has a really intense roar at full tilt, like any good Big Muff really." I used my old Ram's Head layout as the starting point, but altered the pot placement and it should be a nice fit in a 125B now.

Wednesday, June 28, 2017

Tiger Pre-Amp

If you're a Dead Head, you'll probably be interested in this one. It's the pre-amp from Jerry Garcia's Tiger guitar used from '79-'89 and built by Doug Irwin. It's a unity gain buffer to prevent signal loss with long cables. It can be built into a guitar like the original or into a 1590A. Other single op-amps can be used instead of the LF356N (TL071, NE5534, etc).

Monday, June 26, 2017

Rockett 10 Ton Hammer

This appears to be Rockett's take on the Marshall Guv'nor, but with a few modifications. The tone control of the Guv'nor has been replaced with a Baxandall EQ tone stack and the output is boosted with a JFET gain stage (much like Rockett Flex Drive). Should fit nicely in a 1590B with board mounted pots.

Friday, June 23, 2017

Glass Jaw

Fuzz Friday! Here's a cool one designed by Alec Breslow (check him out on Instagram) who was cool enough to share his schematic. It's based on the EQD Acapulco Gold with an added blend control and Baxandall EQ. Good for both bass and guitar. It's laid out for board mounted pots an will fit nicely in a 1590B.

Here's the schematic for reference:

Wednesday, June 21, 2017

Castledine Electronics The Wizard

Here's another take on the cascaded JFET overdrive design. This has a similar goal to the Catalinbread Sabbra Cadabra in trying to sound like Tony Iommi with a treble booster feeding a tube emulator. The Wizard is...

A new distortion pedal, inspired by Tony Iommi's guitar sound on the early Black Sabbath albums. It is well known that he used a modified Rangemaster to drive his amps, so the same principle was used for The Wizard. The first gain stage is essentially a Rangemaster, using a germanium transistor, but tweaked for a full range boost. That drives a distortion circuit which has been designed to give something of the tone and feel of a Laney Supergroup amp. Obviously, there is no substitute for a full stack at volume, but The Wizard has a similar distortion character and responds well to picking dynamics. 

I've laid this out specifically for a 125B enclosure with top mounted jacks.

Monday, June 19, 2017

Catalinbread Sagrado Poblano Picoso/AMZ MOSFET Booster

The Catalinbread Sagrado Poblano Picoso is a bass version of Jack Orman's (AMZ) MOSFET Booster. Really the only difference between the two are a couple cap values. So if you want to build the AMZ version, sub the 470µF cap with a 100µF and the 220nF with a 100nF. Should be a pretty easy fit in a 1590A.

Friday, June 16, 2017

MMR Fuzz

Here's another great design by Nocentelli for Fuzz Friday. It's a fairly simple 2-transistor design with a wide range of tones on tap. Pots are all board mounted and should fit in a 1590B just fine.

Wednesday, June 14, 2017

MXR Distortion II

This one was kind of a sleeper. No where near as popular as MXR's Distortion +,  the Distortion II was quite a bit more complicated and ran off a 15v supply, complete with a built power cord . This layout is a bit modified from the original, and can be run off a normal pedal power supply (+9/18v). Originals also tend to be very bass heavy, so I've included a few mods to tame the low end. You might be able to fit in a 1590B, but a 125B will have a bit more room.

Monday, June 12, 2017

Little Angel V4

Had a request for this one and ended up drawing it up in Eagle. Rick Holt (frequencycentral) over on DIYSB designed this chorus and this is the latest version. It differs from earlier version with 2 toggle switches: One changes the effect from chorus to more of a vibe, and the other changes the sound (Space/Warble). I've also uploaded this to OSHPark if anyone is want's a fabricated board of this one. Best fit will probably be in a 125B.

Friday, June 9, 2017

4ms Noise Swash

Figured with all the big layouts this week, I'd better finish it off with another big one for Fuzz Friday. This one's great if you like flipping switches, playing with knobs and making a ton of noise. Not all that complicated really, just a lot of controls for tweak-ability. The original 4ms design says to use a switched pot for the Self Oscillation control, but you can use a regular pot and a separate SPST switch instead if you want. Here's the schematic for reference.

Wednesday, June 7, 2017

Diamond Compressor

Gotten several requests for this one and for good reason. It's probably the best optical compressor design out there. This one's not for the feint of heart, and will take up most of a 1590BB enclosure. 3 jumpers, but the pots are board mounted. The on/off indicator LED in the original is a bi-color LED that pulsates with the signal. The switches in the original are internal, but can be mounted externally for more control. Be sure to jump lugs 3 and 5 on the EQ switch. Here's the schematic for reference.

Monday, June 5, 2017

Hell's Gain

Got a request for this one. It was designed by Haroldo Gamal and Leonardo Plautz Chocron. The Hell's Gain is a high gain distortion with an active 3-bad EQ. It's a big one that ended up with a lot of jumpers, but's fairly standard with circuit using a bi-polar supply. It'll fit in a 1590BB or you might be able to squeeze it into a 125B if you turn the board sideways. Enjoy!

Friday, June 2, 2017

Emanating Fist Black Acid

The Black Acid is the big brother of the one knob Black Dust fuzz from Emanating Fist. It's a silicon Fuzz Face variant with a Drive control that pans between 2 input capacitors. It's laid out for board mounted pots and will fit nicely in a 1590B.

Wednesday, May 31, 2017

BMP Tone Stack

Had a few requests for adding a Big Muff tone stack to a few existing layouts. Call me lazy, but it's easier to draw this up than make a whole bunch of random alternate layouts. 😁  Anyway, it should be pretty handy. I've included a layout for just the tone stack, and one for the tone stack plus the gain recovery stage that typically follows the tone stack in a Big Muff. You can use different values for various responses (values listed in the image below).

Monday, May 29, 2017

Jack Deville Deuce Coupe

Here's a modified version of the Deuce Coupe. It's an opamp based drive with a charge pump so the circuit runs off +/-9v. The originals have relay bypass switching and a boost function (that I've not included in this layout). You can probably fit it in a 1590B, but a 125B will be a little roomier.

Friday, May 26, 2017

Black Arts Toneworks Revelation

For Fuzz Friday here's the Revelation from Black Arts Toneworks. There are 2 versions of the Revelation: the Super Bass and Super Lead. The Super Bass is a stripped down Pharoah without the tone control, no clipping diodes in the 2nd gain stage, and an input gain control. The Super Lead version is the same circuit, but with the values of the Black Arts LSTR.

Wednesday, May 24, 2017

Run Off Groove Omega

Here's a nice little boost from ROG that originated from trying to design a FET-based Rangemaster treble booster. I've laid it out for a 1590a with board mounted 9mm pots. More info, schematic and sound clips can be found here.

Monday, May 22, 2017

EarthQuaker Devices Talons

A while ago I laid this out for board mount 9mm pots at the request of someone on FSB. Always intended to modify that original layout for use with more common 16mm pots. Turns out it was easier to just lay it out fresh. Anyway, the Talons is a very versatile OD with an active 3-band EQ, and can run off +9v or +18v power supplies.

Friday, May 19, 2017

Crazy Tube Circuits Starlight

Here's the Starlight fuzz from Crazy Tube Circuits for Fuzz Friday. Much like the Ziggy Overdrive from Crazy Tube, it's a string of FET stages in a row, only with a lot more them (and also some MOSFETs as diodes thrown in). It's laid out for board mounted pots and designed to fit in a 125B with top mounted jacks.

Wednesday, May 17, 2017

Smallsound/Bigsound Sparkle Motion

Stumbled across this one on the old Smallsound/Bigsound blog. The Sparkle Motion is based on the classic Rangemaster treble boost, but with a lot of extra controls. Schematic and more info can be found here.

Monday, May 15, 2017

BBE Boosta Grande

The Boosta Grande is a simple opamp-based boost that's pretty similar to the MXR Micro Amp. Only differences being where the pot is in the circuit and component value changes. Offers up to +20dB of boost. Should fit in a 1590A if you don't board mount the pot.

Friday, May 12, 2017

FuzzHugger FX Algal Bloom

Here's another cool fuzz from FuzzHugger for Fuzz Friday. The Algal Bloom is transistor based with a wide range of tones, from mild overdrive to full on fuzz. It has the Gain and Level controls you'd expect, along with a Bloom control (expands the fuzz tone), Clean (blend), and Power (voltage sag), along with 2 toggle switches for more things to tweak. Originals have the Clean control internally, but who doesn't love more controls? It's laid out with board mounted pots to fit in a 125B enclosure with top mounted jacks.

Wednesday, May 10, 2017

Auto Swell

Someone showed me this circuit and it's a cool addition to this library. It's an old project from Electronics & Music Makers magazine and allows you to ramp up and down your volume. It's not a true-bypass pedal, but essentially an always-on boost that increases your volume when the momentary footswitch is pushed. More info and schematic can be found in these scans:

Monday, May 8, 2017

Black Arts Toneworks Black Forest

This is Black Arts' take on the Colorsound Overdriver. There are a few component value changes and 6 different caps on a 2 pole, 6 position rotary switch at the input. It's got a wide range of tones, and goes from boost to overdrive to fuzz. It's laid out for board mounted pots and would fit in a 1590B if it weren't for the rotary. If you wanted to skip the rotary and just use one input cap, just populate the capacitor you want and jumper its corresponding pad to the SwA pad.

Friday, May 5, 2017

Hornby Skewes Zonk Machine II

The Zonk Machine II was the more budget friendly version of the Zonk Machine. It was a simplified circuit and featured silicon transistors in place of germanium. Originals used 2N4061 PNP silicons, but other could be used. Because it's silicon based, it shouldn't be too hard to make the swap to NPNs so it can be daisy chained with other negative ground effects. I've laid out 2 versions of this, one for BCE pinout transistors (like the original 2N4061s) and one for CBE pinout transistors. The perf layouts reflects the original positive ground configuration, and the PCB layouts reflect negative ground configuration. Note that the 3.9k resistor isn't always necessary (it's there to make the Fuzz pot value 2k). Here's the schematic for reference.

Wednesday, May 3, 2017

Frantone Vibutron

Here's another one of my Eagle creations. The Vibutron is a great sounding tremolo from Frantone that uses a ICL8038 to produce the LFO. Originals use a rotary switch for selecting the waveform, but as lvlark pointed out on the Tagboard Effects blog, a on/on/on DPDT switch can be used instead (check out his layout for switch wiring). For you perf builders, this might be a bit difficult to translate to perf (especially with 3 traces under the 8038), but I'm sure one of you out there will make it work. :D This layout has also been uploaded to OshPark if you want a fabricated board–click the OshPark tab above.

Note: Red lines are jumpers

Monday, May 1, 2017

Way Huge Green Rhino Mk II

Here's the newest version of the Green Rhino from Way Huge. It's similar to a Tube Screamer, but with a few extra stages and lots of modifications. I've laid it out for board mounted pots in a 1590BB. Here's the schematic for reference.

Friday, April 28, 2017

Hornby Skewes Zonk Machine

The Zonk Machine was one of the many British fuzz boxes that came out in the mid-60s. Like the Tone Bender Mk II it was designed to compete with, it also was featured 3 germanium transistors but offered more of a boost and slight oscillation (in a good way). This is a positive ground effect so unless you use a charge pump or can make it work with NPN germanium transistors you can't daisy chain it with other negative ground pedals. If you are going the NPN route, be sure to rotate the polarized caps an the diode 180º. Here's the schematic for reference.

Wednesday, April 26, 2017

Lovepedal JTM

Got a request for this one. It's another Electra-derived overdrive, this time meant to sound like a Marshall. This should be an easy fit in a 1590A.

Monday, April 24, 2017

Run Off Groove Supreaux Deux

Got a request to do this one again but with board mounted pots. If you don't know, it's a FET emulation of the classic Supro 16T amp. More info, schematic and demos can be found on the Run Off Groove article.

Friday, April 21, 2017

Black Arts Toneworks Fnord

Got a little Eagle excursion for Fuzz Friday. Here's the Fnord from Black Arts Toneworks. It's pretty much the same as the Escobedo Digital Octaver Fuzz with an added diode lift switch (though that's jumpered in the originals). It's a pretty gnarly fuzz with a wide range of tones. For you perfboard builders you should be able to translate this onto perf pretty easily.

Here's the schematic for reference:

Wednesday, April 19, 2017

Way Huge Saffron Squeeze

Here's Way Huge's take on the Ross Compressor. This is based on an original from the mid 90s that was traced over on FSB. It will fit in a 1590B with side mounted jacks or a 125B with top mounted jacks.

Monday, April 17, 2017

Wampler Pinnacle

Got another cascaded JFET design, this time from Wampler. Great for getting those EVH Brown Sound tones. I've added 2 trimmers for the 2 non-cascaded JFET stages to make biasing at little easier (originals use 22k resistors). Should be an easy fit in a 125B with top mounted jacks, but should also work in a 1590B with top mounted jacks (though you have to be really precise drilling those).