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...

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...

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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.

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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...

Hello, I am searching an schematic of the overdrive od-5 from Harley benton .... can someone help me here?

Low gain fuzzy overdrive “Schlager.Fuzz”

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:

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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...

Here’s a PCB I made that uses the part numbers from the Big Muff Page. Find a schematic there and populate this board!

Here is an Elk Electrosound I did.

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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...

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.

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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...