The research folders: please contribute whatever little piece of information you might have on stompbox circuits new or old. Discussion should be civil and to the point.
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Vintage Stompbox Corner ( ... - 1975) Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...
Boutique Stompboxes dissected... General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.
DIY Projects 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. Subforums:
Printed/Published Online Designs,
Original Tracer Layouts
Analysis Requests Folder Before you launch a request, please a) search the forum; b) search the web and c) share whatever you did find and where you searched.
I've recently noticed that Tim's great site at is coming up as a virus, trojan horse, or other bad things in my browser. So I thought I'd grab all the circuit images and zip them up for safe keeping. I have emailed him in the recent past, but there has been no reply. :hmmm:
Attached is a zip file of ALL of the effects circuits from his site.
Rock on, and may the creative spirit of the Great Escobedo be with you always. :thumbsup
For a long time I've felt guilty that my pedal board didn't include a compressor. Finally, after about a year of breadboarding, I have produced a circuit that can take on a Dynacomp and win , boasting:
Up to five times more headroom than a Dynacomp
Less noise than a Dynacomp
Same available sustain as a Dynacomp
Fewer parts than a Dynacomp
Cheaper than a Dynacomp
Feedforward side chain
Possibility for all five controls
Fits in 1590B
Millennium bypass
This section is devoted to circuit analysis . This means...
requests for schematics or layouts will be moved the the Request section
messages about your sick puppy or your new Android powered phone should go into the FSB Café
debugging questions will be moved to the Workbench
useless post (containing no extra information) may get deleted to preserve the readability of the thread.
you should check whether a thread exists about the unit in question, and add your info in that thread.
you...
My first try at tracing a circuit and third layout.
The circuit has an input + buffered output and an xlr ofc.
Versatile as it can be powered 9-16VDC or by phantom power.
The layout is verified , as I built it a few hours ago and works perfectly !
Peavey-EDB1-schematic.png
Row H can be ommited as it is not connected to any component.
Hello, Is there anyone who has the Keeley Compressor Pro and can send me high-quality and high-resolution photos of its PCB ? I want to design a compressor with THAT4320 and I want to get help from this pedal. :D
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:
I got this unit in as it wasn't functioning correctly. I tried part of the problem to a wrong oriented filter cap. When I measured most electrolyte caps I noticed that they didn't measure properly. In the end I replaced all electrolyte caps.
Belcat - Power Master.JPG
Notice that all voltages (after the fix) are of different values. Guess a low quality pedal!
After showing you a couple of not-clones, here's a more original circuit I'm proud of. It's a parametric mid frequency eq with also bass and treble controls.
I think equalizers are very very powerful effects, altough they shouldn't be overestimated when post production is an option. Usually diy-ing a graphic eq is hindered by the amount of controls needed for a decent amount of bands, being them pots or worse, sliders. So I wanted to look for an alternative, and one which didn't feel like a...
Does anyone have a schematic for the Danelectro Rocky Road. I'm working on a rehouse and I'm having trouble with the speed potentiometer. I'd like to see if I have the correct value and if have it wired correctly.
The original pot is marked 104 which I interpreted as B100k.
Hey there,
Ive just recently got a Crybaby gc95 wah. Ive noticed that, when the wah is almost fully pressed toe down (trebly end) , just before clicking the footswitch and turning effect OFF - theres a space there that causes silence - no bypass tone or wah tone. I can sometimes hear it when rocking the pedal and getting too close to the trebly end or when turning off the pedal - theres a little brief cutting of the sound. A couple of time it actually was stuck there even after continuous...
Anybody have a schematic for the Luxury Drive? I've been wanting to try one out for ages but can't seem locate one where I live. From what I've seen in pictures, it seems like a simple circuit.
Ok, I might intentionally have double posted this :D. I do apologise, but I think this might be of interest to more people.
I have some Qtron (+) mod questions:
1. Volume mod. I presume it would be done by adding a A10k in a standard way like this?
2. R32 mod. Is it the R32 as in the schematic of this thread ? And with what should it be replaced? I think it is already altered in this version as I read it was replacing the 100k with a 47k or lower. Am I correct?
3. Mix mod. Am I correct in...
I wasn't sure if I should have posted in the old Hudson sidecar thread .
In 2024 Hudson Electronics introduced the Motorcycle as a limited edition:
The Motorcycle is a modified version of our Sidecar overdrive pedal – our take on the soft clipping overdrive circuit with the added versatility of a powerful two band EQ which draws inspiration from a vintage recording console.
I have built many pedals, but I have never drawn a schematic before. I did my best to identify all the...
I actually have one of these and just thought I would add some photos that I took for anyone's consideration. Its an interesting pedal, has a crunchy bright top end that gets brighter with more gain. As a result you'll fiddle with the tone knob as you fiddle with the gain most likely. They mention the muff as an inspiration but it doesn't look anything like a muff to me unless its part of the op amp version.
Hi! I've found an interesting tone filter in the shin-ei companion fuzz, but i don't seem to understand how it works and what it exactly does. Could someone help me?
I sent a bunch of pics to AG a while back, but I know he has a lot more important things to worry about these days...
Unfortunately I dont have wiring photos (and I can't remember the name of the guy who sent these pics to me....) , but these should get us close. We'll just have to make an educated guess about the pot values and wiring.