Original effects with schematics, layouts and instructions, freely contributed by members or found in publications. Cannot be used for commercial purposes without the consent of the owners of the copyright.
Original Tracer Layouts A collection of original layouts for vintage guitar effects. If you want to build real replica's of vintage pedals, this is the forum you want to look at.
This page tries to keep the available projects indexed.
If you want to share files to build a effect that's not yet (widely) available, it would be a pleasure for us to host it here.
The projects should be verified , though, and at least contain a schematic , some layout file (transfer, vero, perf) and a component layout file .
Incomplete or unverified projects will be moved to the Projects in Progress folder: if you fall upon such a project, please report the...
You asked for it and here it is :wink:
The Vox AC30 Top Boost amplifier including driver and output stage in a convenient 9v dc overdrive pedal format :lol:
There are three places in the AC30 where clipping occurs at different signal levels - with input gain and tone controls on maximum reasonably symmetrical occurs first on the output stage at approximately 1.3mV 1kHz sine wave signal input level. At 2.8mV signal input the driver stage goes into asymmetrical clip at first and eventually...
The charge pump in the Klon seems a bit unnecessary to me. The only logical reason it should be used is to keep op-amp U2 from clipping.
But here's the thing. When the gain pot is at maximum, the only signal hitting U2A has already been clipped by the diodes, so a typical Ge diode will limit the signal going to U2A to under 1V p-p. For this signal U2A has a gain of about 8.3. Granted, this would clip a TL072 with a 9V single supply. BUT, if you used a rail-rail op-amp, then you'd get no...
I've been on a bit of a delay kick (see EchoWreck and T60) and thought why not try a double tracker? However, one reason there are so few of them out there is that the PT2399 doesn't do short enough delay times for a lot of double tracking. It's got a 29 ms or so minimum time. I was repairing a CE-5(t) that uses the ES56028 and found it had very low delay times, but it's a 40 pin chip. Turns out there is a 16 pin ES56033. I bought five on Aliexpress to try out and the Stalker came out of it....
I've had the idea of an envelope-controlled VCA effect pedal for a few months. Of course, many existing circuits fall into this broad definition, including compressors, the boss slow gear and tremolo effects, for the VCA part.
So what would set mine aside? One focus is on versatility. Once you have a way to control your output with a voltage, you can do whatever you like with it: swells, plucks, tremolo or even compressor if you try hard enough. I wanted to have at least a few of these modes at...
INTRO
Among the CD family of chips, the 4046 surely stands out. It's not a simple, but still cool, logic gate or switch, it's a whole system under the name of “phase locked loop”! Of course, seen this way it doesn't make it any more clear how and why it's used in pedals, but after reading this app report it's easier to identify the building blocks and how they interact in what they do. In brief:
We have two inputs to be compared, of which one is inverted. These get routed to not one but two...
Here's my take on the BMP tone control. This goes from extreme mid-scoop with the bass and treble all the way up, to flat, with the controls halfway, to mid-humped (like a Tubescreamer) with the two controls down a bit. The output might be a bit low for some - add the original gain make-up stage after the FET if you want, but the FET prevents the tone control being loaded down which would spoil all the fab toneliness!
BMPPlus.PNG
I'm posting this here for the benefit of the community. It's my own idea of what a Rockman headphone amp should be like, made with modern, easily available components. It is intentionally not an exact clone of any specific Rockman model, because my aim right from the beginning was to make it better. I'd say it's closest to an X100 without the Echo part, but with a nice feature from the Soloist (the Doubler mode), and another really nice feature from the Ace series: single 9V battery power. I...
After designing the Equinox I decided I ought to build a simple PT2399 delay, much like the Rebote or DBD. A lot of people complain about the lack of tails with those two projects, so I added that too. Includes my usual full buffering, electronic switching, and 3dB quasi companding. Heavy filtering allows for useful delay times and the usual analog-ish sound, although above about 300ms you start to hear the digital hiss. You can hear it at the end of the sound clip, when all controls are turned...
I've always liked the tone benders, and thought that it would be fun to build a few with differing component choices and various transistors. Over the last few months, I've made about twenty of the things - all slightly different. I've extensively played through them, and have chosen the two or three that sound best (to my ears). The very best is shown here - it's a smoothed silicon bender, and just sounds great! All the other prototypes were put into diecast boxes and given to musician friends...
I apparently have a thing for delay/reverb circuits. I decided to do a true stereo reverb using PT2399. It's based on my Spare Room design, but it takes advantage of of the ability to cross feed the left and right signals and to do some cool cross channel-dependent modulation. It's not a small circuit by any measure. In fact, it may be the most complicated single knob pedal in the DIY world, but it's a fun one. The schematic is too big to post at reasonable quality here, but I put the short...
I have built an old favorite from this board, the Highway 89 from Doug Hammond. This pedal kills. The tone is rocking and ballsy and the clean up is great!!
I was trying to let the other guitar player in my band use it and I discovered a really strange issue that we have tracked down to a power issue generally but do not know specifically what the problem is.
When it is powered from my old dinosaur SKB pedalboard the pedal works fine, as it does when I use a single Boss PSA 120 style...
Here is my latest original build. The enclosure came from a 3-knob AliExpress zendrive clone kit by Landtone. I first used it for a DIY Friedman Golden Pearl, which is why there are two extra switches. It turned out that keeping these let me design a bit more flexibility in.
MOStache schem.PNG
It's a fairly straight forward amp-in-a-box type of deal, but here I'm using P-Mosfets (hence the name) instead of Jfets because they are much more...
Hi all, I am building a dual overdrive. I would like to include effects order toggle switch to change which effect is first. I am clear on how to do this using a 3PDT toggle.
I would also like to be able to insert an external pedal in between the two circuits. I am not clear on how to do this and still retain the order switch. I could do it manually with two independent circuits, individual input and output jacks, using a switching jack and patch cables to insert an external effect AND/OR...
So Experimental Noize came out with a DSP tailored for pedals.
However the FXCore is not as easy to incorporate in a circuit as the FV1 is.
That's why I made this very compact devboard (only 30 by 43mm). Also, it's breadboard compatible for easy prototyping.
It takes care of the audio conversion and helps to simplify the program selection.
There's a small microcontroller that converts an analog input into a 4bit selection code for the DSP.
This way any pot or switch can be used to select a...
Did this one a while back but thought I'd share here. I took the basic bones of the Deep Blue Delay (changed some filtering values), added a variable LPF on the delay output (via trimmer/cap), added a second Delay Time control with a slow transition when switching between Time 1 and Time 2. It works similar to some versions of the Toneczar EchoCzar how it does the glide between Time pots. Probably more of a curiosity than something you'd actually use all the time, but it's fun to play around...
This build was a bit of an accident. I recently built a Phase 45 with JC Malliet's mods. The original concept was to fit the entire circuit including the pots on a piece of 9x37 hole perf. After buiding and testing the main board I wasn't really happy with the quite subtle phasing. All that hard work wasted? No way was that going to happen - so I cludged in a further two phase stages on a daughter board for a deeper phase effect. I never would have been able to squeeze a Phase 90 onto a board...
I like to present an overdrive / low gain fuzz—a lockdown project:
Starting from a fuzz face with lower beta germanium transistors, a fuzz circuit was tweaked to lower gain, softer clipping and the ability to handle (fat sounding) humbuckers:
schlager_fuzz_realized_en_grosz.gif
Low cut / mid boost including low cut control was inserted before input—to allow using guitars with “fat” pickups.
Low cut condenser value / low cut frequencies could be...
Hi folks
As promised my version of the KORG CX3 1980's portable organ Rotary Effect.
This is definately not a project for beginners ( not another fuzz face or thuper hard on :wink: ), but if you are up to it, you will be rewarded with beautiful Hammond Leslie speaker cabinet type tones.
I have kept it as close to the original KORG circuit as possible, with the following changes - an additional n channel jfet buffer at the input, a simpler fast/slow speed switching arrangement, and add on...
here's a little design i threw together based on a neat little digital delay chip i found on AliExpress while looking to build a vibrato with a better frequency range than analog can provide.
its a fairly standard chorus/vibrato-with-blend type of deal, nothing super novel or innovative, more a proof of concept than anything. i've just borrowed the LFO from the VB-2 since i wanted a sine wave. and since it also had its own precision Vref supply, which i like, so i could keep it isolated from...
Do you remember the old-fashioned way of doing bass compression? It used an LDR across the volume control illuminated by an incandescent lamp across the speaker terminals! It was a simple method back in the 60s....
This compressor is almost that simple! It uses a handful of cheap components (I built one for £9 including hardware!), but works really well. Guitarists who've tried it often ask Is it on? , but miss it when it's off! It's quiet, and has good squeeze without the gain-change...
Hello,
since years I am using my own pre-amps which I box into either Eddystone 26908PSLA or Hammond 1590C enclosures. These I place on my pedal board, they run in the loops of my Line6 HX Effects. By that, all I need is a cable from my guitar to the pedal board, 4-wire method around HW Effects on the board and finally one cable from my pedal board to the power amp. I had since years the idea to build a Class-D power amp to get rid of the heavy Fender Bassman I used for too long now as power...
A fun variation on the classic D+/250 style circuit that nobody asked for. I like the original but wanted a little more flexibility from it.
2500.PNG
IC1 is a precision Vref supply which I like to include when I can.
IC2 is a super useful variable capacitance multiplier, borrowed from the page on gyrator filters at you can read more on it there. Here's its used to get a Timmy-style pre-clipping bass control but by virtually changing the capacitor value in the feedback network, as opposed...
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