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, April 24, 2018

Catalinbread VariOboost

Here's an older design from Catalinbread, but an interesting design as usual. It's a preamp/boost with a wide range of tone shaping capabilities. Schematic can be found here.

Thursday, April 19, 2018

Active Baxandall Network

Got a request for a Baxandall tone stack daughter board, (much like the Big Muff Tone Stack daughter board) and thought it was a great idea as it's a great tone control. The schematic for this came from this article, which is worth the read. I've laid it out two ways, one with board mounted pots, and one without that's a little more compact.

Note on the board mounted pots version the fill on the PCB is not ground.

Tuesday, April 17, 2018

CultureJam Shoot the Moon

Here's a great optical tremolo designed by CultureJam. Schematic can be found here. D1 is the external rate indicator and could be used as the on/off indicator as well. Just use part one pole of your 3PDT to break/connect one of the leads of D1. D2 and the LDR should be isolated together (heat shrink tubing works great). Tayda LDRs and either orange or red LEDs seem to work well in this circuit. A NSL32-SR3 optocoupler works well too. 

Friday, April 13, 2018

Demeter Fuzzulator

Here's an interesting opamp-based fuzz from Demeter for Fuzz Friday. I imagine other dual opamps can be used in place of the LF442, so socket and experiment. The trimmer in the original seems to be set at 2.5k. Schematic can be found here.

Tuesday, April 10, 2018

Boss DS-1 with Keeley Ultra Mods

Got a request for the classic DS-1 with some Keeley mods and since my earlier DS-1 layout doesn't have board mounted pots, it seemed like a good idea. The flip-flop switching has been removed. Here's the schematic for reference.

Thursday, April 5, 2018

TC Electronic Integrated Preamp

Here's a loud one for you (I am not responsible for any blown speakers that may happen as a result of you building this thing! haha)! It's a popular preamp and used as a booster by the metal band Meshuggah. It apparently sounds best run at 18v. I didn't include an onboard charge pump since I know a lot of you prefer different methods for that. Should be plenty of room in a 1590B for a daughter board with your preferred charge pump. Schematic can be found here.

Tuesday, April 3, 2018

Lovepedal Tchula

Another Electra variation from Lovepedal. It's described as a two-stage COT50... I guess the "stages" are the different ways to bias the transistor off the emitter. The stages are switchable via footswitch in the originals, but if you put it on a toggle switch you should be able to fit it in a 1590A. Here's the schematic (this was traced from a cream box Tchula):

Friday, March 30, 2018

Frantone Cream Puff

Happy Fuzz Friday, everyone! Got a few requests for this one. It's a bit like a fuzz in the way a Big Muff is a fuzz–bridges the gap between fuzz and distortion. And it's somewhat similar to a Big Muff with two gain stages pushing a BMP tone stack. Schematic can be found over on FSB.

Tuesday, March 27, 2018

Fender Eric Clapton Active Mid-Boost

Got a request for this one. It's the active midrange boost (of up to 25dB at around 500Hz) found in Fender's Eric Clapton signature Stratocaster. Ended up not board mounting the pots for a smaller board for those building this into a guitar. Here's the schematic for reference.

Thursday, March 22, 2018

MXR Commande Sustain

Here's one from MXR you probably haven't heard of before. It was apart of their Commande line of plastic boxed effects from the late 80s. They aren't highly regarded because of the plastic, but the circuits were pretty well designed. The circuit in question today is a better design than the DynaComp, offering less distortion and more sustain. It does have a little less compression range than the DynaComp, but also less noise. (And really, who needs that much squish? haha) Couldn't find a demo of this one, but the schematic and discussion can be found here on FSB.

Tuesday, March 20, 2018

Baja VH4

Another drive circuit from Bajaman. He's been on a tear lately! In his words...

Here is my latest build based on the frequency response characteristics of the Diezel VH4 tube head channels 3 and 4, but scaled down into a 9v dc pedal friendly format... I got a chance to try using it on Neil Young's "Keep on Rockin' in the Free World" and needless to say it sounded awesome on very low gain setting Channel 3 - just the right amount of searing crunch and in my view one of my best pedals to date!

It will fit in either a 125B with top mounted jacks, or a 1590B with side jacks. If you go 1590B, you'll either have to offboard the pots or use long leg pcb-mount pots and populate them on the component side. I've added extra pads for the JFETs so you can use either DGS or GSD pinout transistors. Schematic can be found here.

Friday, March 16, 2018

Os Mutantes Fuzz

Got a request for this one and thought it'd be a good Fuzz Friday layout. It's got a fair amount of treble and grit on tap and should fit pretty easily in a 1590a. Schematic here.

Tuesday, March 13, 2018

Lovepedal Jubilee

Here's Lovepedal's Jubilee–pretty close circuit-wise to the Purple Plexi and Black Magic. Should be a pretty quick build. Note, if it sounds too dark, replace the 47nF cap with a 4.7nF cap. Schematic here.

Thursday, March 8, 2018

VooDoo Lab MicroVibe

Here's the Micro Vibe from VooDoo Lab—aka, welcome to jumper city. Always seems to happen with vibe circuits, but this one will fit in a 125B quite nicely. Pretty standard adpation of the old Univibe with speed and intensity controls. Set the trimmer to 250Ω (and be careful if you adjust it since there's no protection/limiting resistor). Schematic can be found here.

Tuesday, March 6, 2018

zVex '59 Sound

zVex's new '59 Sound looks to emulate an overdrive '59 Fender Bassman amp and is essentially a tweaked Box of Rock. I've left out the boost section (which is essentially a SHO after this circuit), but can be easily added with the old SHO layout here on the blog.

Also, there's another installment of the DIYLC tutorial up on YouTube today. I actually am not using DIYLC all that much in it... 

Friday, March 2, 2018

Jext Telez White Pedal

Here's a pretty cool one for Fuzz Friday–the Jext Telez White Pedal. It's a recreation of an onboard overdrive unit in a vintage Vox amp used by George Harrison in the late 60s. Schematic can be found here. Pots are board mounted and I've tweaked the Yoko switch to just be a toggle instead of a rotary like the originals, and it should fit nicely in a 125B.

Tuesday, February 27, 2018

Vertex Steel String

Here's a relatively new effect from Vertex–the Steel String Clean Drive. It's supposed to sound like a Dumble amp and is 2 muamps going into a BMP tone stack. Schematic can be found here.

More progress with the tutorial. Actually wrapping up the DIYLC portion before moving onto the Photoshop bits.

Thursday, February 22, 2018

Baja SLO

Here's another one from Bajaman. It's a modified version of his AFD, but tuned to sound like a Soldano amp high gain channel. There are enough differences to necessitate a new board. More info here on FSB. Much like the AFD board, this one has the option for buffered bypass or true bypass. And the drilling template fore the AFD will work for the SLO as well.

Tuesday, February 20, 2018

Baja AFD

Here's a unique overdrive design by Bajaman over on FSB. You can build it with either a buffered bypass or true bypass. If using true bypass, omit the 1k resistor below the lower TL062, and the 1uF cap and 100k resistor connected to the BP Out pad. To wire for buffered bypass, connect the In pad to the input jack, the FX Out pad to lug 1 of the footswitch, lug 2 to the output jack, and the BP Out pad to lug 3. More info and schematic over on the FSB thread. Thanks to 287m for sharing his layout.

Also, the next episode of the DIYLC Tutorial is up on YouTube. Almost have a completed layout!

Thursday, February 15, 2018

MultiCab Sim

Got a request for this one, designed by Daniel Schwartz. Seems to be a pretty versatile cabinet simulator. Might be handy to throw this in the same box as the Mini Amp from earlier this week. More info, schematic, etc here on DIYSB.

Also the next episode of the DIYLC tutorial is up on YouTube. Forgot to plug it in the post from Tuesday.

Tuesday, February 13, 2018

1 Watt Mini Amp

Here's a nice little solid state amp for headphone use or a small 4Ω speaker. Good candidate for a bench top amp for testing purposes. You can board mount the pot and it will fit in a 1590A just fine.

Friday, February 9, 2018

DOD Carcosa

Happy Fuzz Friday, everybody! Here's a new fuzz circuit from DOD. It's a cascaded transistor design offering a wide range of tones with tons of output. Should be an easy fit in a 1590B.

Tuesday, February 6, 2018

Run Off Groove Uno

I know I've mentioned this to a few people over the past year probably, but I've finally been able to get it edited. That's right, here's my tutorial on how I layout circuits in DIYLC... the first installment at least. The tutorial shows how I created today's layout–the Uno from Run Off Groove. It's a JFET amp emulator of the Boogie Mk I. For the schematic, demo and more info check out the Uno article.

Thursday, February 1, 2018

Fenrir Distortion

Came across this schematic over on the Tagboard Forum and thought it'd be a good addition here. Heavy distortion tones on tap with some clipping options and a full 3-band EQ. Switch is a SPDT on/on.

Tuesday, January 30, 2018

Electro Harmonix LPB-1

Got a request to redo the LPB-1 with the pot board mounted. Can't say I'm opposed and it only took about 5 min to layout. :) Easy fit in a 1590A. If you want to make the Screaming Bird treble booster, replace the two 100nF caps with 3.3nF.

Friday, January 26, 2018

SolidGoldFx If 6 Was 9

Happy Fuzz Friday, everyone! Here's a nice little modded Fuzz Face from SolidGoldFx. The switch selects between input caps and the Bias pot adjusts the voltages to Q2. Other transistors can be used beside the BC183C in the original. As usual, sockets are your friends. Easy fit in a 1590B.

Tuesday, January 23, 2018

Earthquaker Devices Westwood

For the blog's 600th layout, here's a new one that didn't take long to get traced. Here's EQD's newest offering, the Westwood Translucent Drive Manipulator. Great for pushing your amp and giving a near clean boost. It features an active 2-band EQ and sounds great on bass as well as guitar.

Thursday, January 18, 2018

AnalogMan Prince of Tone

Wanted to redo my old layout with board mounted pots. I've laid it out with the Presence control externally and the diodes on a DIP switch, though you could easily wire up an external toggle if you want. Should fit nicely in a 1590B. If you want the King of Tone, just but 2 in one box.

Tuesday, January 16, 2018

Run Off Groove Azabache

Not sure how/why I avoided laying this one out for so long. The Azabache is a great sounding overdrive that emulates classic Fender amps. Check out the ROG article on the circuit for more info, schematic and sound demos. Adjust the trimmers so there's 6v on the drain of Q1, and 5v on the drains of Q2-4. You should be able to squeeze it into a 1590B.

Friday, January 12, 2018

DBA Octave Clang

For Fuzz Friday here's the Octave Clang from Death By Audio. It's a transformer based octave fuzz utilizing a 741 opamp. Fairly low parts count and should fit in a 1590B.

Tuesday, January 9, 2018

Ross Compressor

Somehow I've not laid this classic out already, so here's the Ross Compressor. One of the most highly thought of (and therefore copied) compressors of all time. Should be an easy fit in a 1590B.

Thursday, January 4, 2018

Earthquaker Devices Disaster Transport Jr.

Here's EQD's take on PT2399 delay. The most unique thing about it probably the use of a Big Muff-like tone stack. It will definitely fit best in a 125B with the board mounted pots, but if you use long leg board mounted pots and populate them from the component side it should fit in a 1590B. Schematic can be found here.

Tuesday, January 2, 2018

Rockett Animal

Another fun overdrive from Rockett, this time going for a Plexi sound. Think of it as the first half of a buffer-less Tube Screamer with an AMZ Stupidly Wonderful Tone Control 2. Here's the schematic for reference. Should be an easy fit in a 1590B.