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...
Hi folks
I have heard a lot of positive comments regarding the Electro Harmonix Small Clone, so I thought I would build one to evaluate it.
I found a layout and schematic etc., at Francisco Pena's Tonepad site, but I wanted to fit it into a Hammond 1590B case with a DC input socket and battery, and the Tonepad board was too long to fit, so I set to work reducing it's size.
I wanted to mount the potentiometers using 30 amp fuse wire to the rear (tracks) of the circuit board. I used stick on 3mm...
At one time I was quite involved into J-FETs. I was originally drawn to them by (dare I say) the legendary A Discrete FET Guitar Preamp schematic by J. Donald Tillman. After a brief acquaintance with the functionality, I left the J-FETs and went my own way of buffers with bipolar transistors. Later I was looking for a schematic that would emulate valves and not be complicated, so I found the Fetzer Valve and I was back again.
I really liked the strict approach of the authors of runoffgroove to...
Hi everyone,
I've follower this schematic (reference from datasheet TDA2050) to build a single channel dual IC bridge power amplifier, dual supply.
tda2030-bridge-amplifier.jpg
For everyone that struggle to understand why they wont achieve max output power, voltage limit must be reach and I think some resistor value weaks also would help.
Short story: Ive blown (I think) the ICs when i switched from low voltage dual supply from voltage divider, low current (TEST) to FULL RECTIFIER 18-0-18...
This 5 Band EQ uses the Rohm BA3812L 5 point graphic equalizer chip. It's a project I started last year but due the chips irregular pin spacing I was never able to breadboard and experiment with it. I had a rough layout drawn out so I decided to give it a try using Eagle. This was my first attempt with a PCB.
This project is from the BA3812L datasheet. With the exception of the cap values used for the different frequencies it is taken part for part. It has worked well after a booster or...
I have a guitarist friend who uses a TC Ditto+ looper pedal to store and replay his backing tracks..... But he hates having to tap twice to stop the looper.
So I built him a simple interface, to allow him to tap once to start -- and once to stop.
(I made some project notes here: www.loop.jp137.com )
It's a simple project using CMOS logic (no microcontrollers involved!) Might be of interest to other looper users who don't like the 'double tap' stop requirement?
I went on to try to find a matching pair of diodes for one of my built.
Long story short, I ended up measuring and testing a good part of all odd diodes I have had accumulated over the decades of tinkering.
Some are germanium, some are silicon, including Schottky, etc. I won’t talk about whether any of these sound “smoother”, “warmer”, “rounder”, “fuller”, etc. I don’t believe in tone wood either; nor that a measured 33nF cap will sound different than any other. Disclaimer being out of the...
I don't usually design boosts or dirt box, but I thought I would have some fun with the Fuzzrocious Ram the Manparts circuit. I've made a significant number of changes, but thought I would pay homage to the name of the original with Rochambeau (or at least that's what my Southpark watching friends tell me). It's a simple affair, with huge amounts of boost on tap. As a standalone dirt pedal it's squarely medium gain is all, but it's quick, dirty, easy, and effective. If you want to build one,...
Last fall I bought a Boss MS-3, which I quite like. I rarely use, but like to have, several effects, so I thought it was perfect. Having three switchable loops was cool, too. Until I looked at all my overdrives, that is. I decided I would like to have more, so I started digging in to how to do it. I settled on using an Arduino nano-based solution that would allow me to connect the Boss MS-3 MIDI out to my switcher so that I can switch loops via patch changes or enable/disable them locally via...
Hi folks
here is something a little different - a bass amplifier 9v effects pedal :shock:
not built yet, but will post pictures when it is :wink:
cheers
bajaman
Baja Orange AD200B MkII bass head 9v pedal 270318.GIF vero layout.png vero cuts.png Baja Orange AD200B MkII bass head 9v pedal parts not on vero 270318.GIF
Sometimes things don't go as you planned. You try and try again but the issues persist. I've started working on this project 11 months ago, but it's finally in a state I'm happy enough with to share it.
Whether I want to record easily or practice without disturbing others, I'm fond of Guitar Rig. One amplifier model it features is the Hot Solo, a Soldano SLO (100). Since it's the foundation of my “no-frills metal” preset, I thought it would be fun to turn the preamplifier circuit into a...
Here is a little onboard guitar pre-amplifier I have been using that has a very low current draw ( battery will last for years), and very low noise. Over the coming posts in this thread I will attempt to show how it can be used in a variety of ways to fine tune the tonal response of any guitar it is installed in. Okay, so why another active guitar onboard pre-amplifier ? Well, most of the designs I have encountered quickly flatten batteries, especially if you forget to unplug your instrument...
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...
Добридень or hello everyone!
I decided to make an overdrive on 2n7000, because apart from Zvex SHO, I no longer met the use of these transistors in guitar circuits. The circuit is built on 3 transistors, a green LED is used for bias.
At first, I designed the circuit in LTSpice, but then I adjusted the sound by ear.
I don't play the guitar well, but you can get some ideas about the sound from the video :D I also speak Ukrainian in the video, so maybe not everyone will understand :D
The initial...
Hi to all.
Fuzzface has undergone so many modifications, so only mine is missing :D
I set out to redo the fuzzface in a way that would be easy to repeat and not sound as sharp as the silicon transistors. Therefore, I decided to add zener diodes between the base and the collector and it softened the sound. Also, the capacitor at the input is also of reduced capacity so that there is no excess of low frequencies.
Here is the modification scheme:
This is NOT a beginner's project.
This was traced from a recent B K Butler pedal and has the bias pot modification which alters the voltage on the cathodes of the 12AX7 tube.
You will need a suitable 12vAC power pack for this pedal - the original has a small toroidal mains transformer fitted internally near the front of the case.
The input and output sockets are isolated from the chassis by plastic insulating spacers. The earth pin on the input socket is connected by a parallel connected 100...
I had wanted to make a compressor circuit for a long time, because it's a popular and somewhat easy to make effect, but the existing DIY offer left something to be desired. You should be ready to accept some compromise, in the form of: noisy and hard to find OTA chips; expensive and hard to find (in THT at least) VCA chips; hard to find (again in THT) and fiddly JFETs; circuits that underperform in some way or another, or; circuits that aren't well translated to instrument input and stompbox...
Here is the latest - the Baja 59 Tweed Bassman 9v pedal.
Enjoy :wink:
bajaman
Baja 59 Tweed Bassman amplifier overdrive 9v 090318.GIF Baja 59 Bassman layout 090318.png Baja 59 Bassman vero cuts 090318.png parts not on board.GIF
Hot off the drawing board - vero layout to follow shortly :wink:
This is the amplifier that after the VOX AC30 changed the sound of British rock for ever - based on the circuit of the 1959 Fender Tweed Bassman it used the European EL34 entode output tubes because they were a lot easier and most probably a lot cheaper for Jim Marshall to purchase in post WWII Great Britain.
enjoy and have fun :D
bajaman
Baja Mars Hall 1959 Plexi amplifier overdrive 9v 090318.GIF
After finishing the Disappearing Act ducking spring reverb, I decided to do a version that uses the Belton brick for people who want something smaller footprint or who want some other features. I chose the BTDR-3 since it can do adjustable decay time and stereo output. The Escape Artist uses the same envelope follower topology, but the reverb path is different. The optical compression is the same, though tailored for the output of the brick. It's capable of huge washes. It can also do mono or...
So many different orange amplifier schematics and so many different topologies - I settled on the 72 graphic mkII to base this pedal on.
Hope you like it - here is the schematic for now - vero layout to follow shortly :wink:
cheers
bajaman
Baja OTR120 Graphic MkII pedal 9v 160318.GIF
I’ve always liked phasers, in fact one of my first pedals I’ve ever built was a Phase 45 clone. Not only I liked how it sounded, another main reason for choosing it (other than the complexity) was that I only needed two matched JFETs instead of, for example, four for a four-stage phaser.
I’ve been sitting there, content with my box, for some years, until recently I’ve heard of the Project 447 phaser on an old ETI magazine. It wasn’t perfect by most accounts (the long string of 741 op-amps in...
I've cloned the Xotic EP Booster from layouts and a schematic I've seen online. the HPF does not function if you follow the traced schematic. Suggestions have been to replace C2 10uf with a 200nf. I'm still finding this quite aggressive filter.
I noticed the F.briggs modded this circuit and removed this filter from the circuit but kept C2 10uf cap in place. Please can some help me understand what C2 does. Should I also be changing the value of C3 100uf rather than C2 10uf or both? I'm not...
Introduction
On my quest through re-imagining effects pedals, I felt like envelope-controlled filters deserved some attention. As it is usual, my motivation comes from the unsatisfaction with existing circuits: from the widespread use of OTAs, with their drawbacks in terms of distortion and noise, and limited availability in some cases; to one-trick pony circuits; to circuits that require matching; circuits whose complexity isn't reflected in the features offered. Ripple is another common...
This is my take on a classic variable state filter with optocouplers!
I added a few cool features:
- A possibility to control it with an envelope follower, an expression pedal or a control voltage. (You can actually use the 3 together, but it's a bit weird how it reacts!)
- A mix button, which allows for cool blending, phaser-like sounds.
Using the CV in with a good LFO, you can use it as a LFO-wha, Tremolo or 2 stage phaser.
It has a few imperfections though:
- It does not go into self...
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