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I put together a layout for this over the weekend - I'll probably have it in my hands in a couple weeks when I get my next batch of stuff from JLC. If it sounds good, I'll share the gerbers with @Chuck D. Bones 's blessing.

That looks like an ESP32 module or similar there in the middle - is there a sufficient antenna keepout there? IIRC it wants some space around the antenna but it looks like it has copper right up to it, and maybe even traces underneath. Also putting it right next to the tube might cause RF...

With the @bean 's blessing, I could map this out and post the gerbers. (But if he's gonna re-issue PCBs I'd hold off of course)

b b b b b b b b b b I dunno what you use to generate the gerbers, but the Bouni tools have a plugin that works very well which you can configure to force-fill zones before export. Of course that doesn't help if you fill the zones and cause some kind of DRC problem, but at least it's something...

Is it possible that you dragged one of those components a tiny bit, and generated your gerbers before running a zone refill? If you move a component just a little bit, it's easy to drag it into a ground plane fill. (ask me how I know). The default when you run DRC is to fill zones first, so if...

That's really odd. Does it make that noise in the bypassed position as well? With IC1 pulled? The fact that there's noise on your input, and there are negative voltages on the first input half of IC1 makes me think that something has gone wrong very early in the signal chain, maybe even on...

I also think that the blank space above the design is a clue. Make sure you don't have an element that is outside of your artwork boundary somewhere - like something on another layer, etc. Or even if some of the pixels of the text on top are clipping the page boundary, it might push the blank...

Plug for the MasFX DIY tower thingie (https://mas-effects.com/tower/), if you're building a lot of pedals this thing is awesome. It has an add-on for a signal generator which has a dozen or so short guitar and bass loops in different styles, plus the plain beeeeeeep tones, and an add-on for a...

What a beaut, I love the hand-drawn traces. Has someone been in there already to replace the op-amps? Those look like they're date code 0821 (2021) but maybe I'm mis-reading. Could someone have bungled a previous repair? I guess one thing I might check would be the electrolytic caps -...

What do your voltages measure now? Do you get something closer to 9V on your 9V rail, or is it still ~7.7V? Is your VREF closer to 1/2 of your positive voltage rail? When you have something seriously wrong with the circuit that you identify and fix, you kind of have to back up and re-try your...

re:VREF An audio signal swings both positive and negative voltage relative to ground. An op-amp can't amplify a voltage below the negative supply or above the positive supply. Most op-amps in guitar pedals have a negative supply of GND (0V) and a positive supply of ~9V. So pedals will supply...

Agree you need to check R101 and R102. The numbers on your ICs tell me that your VREF is totally wrong. Am I reading correctly in the list above that the voltage on IC3.2 pin 5 is 0.007? That's exactly what you'd expect if R102 was 10R instead of 10K (@micmac spotted this in #10). (7.7 * 10 /...

Oh, based on the schematic that looks expected. It looks like that half of the dual op-amp isn't used, so it's all just grounded to itself on a little island. (Sorry, I guess back to the drawing board!)

I have to underline the advice about the audio probe, in my (limited) experience it's been the most useful tool for diagnosing issues on my builds. It's really helpful to find the place on the circuit where the audio dies, it helps narrow down what part of the board you need to squint at. One...

Have you tried an audio probe, to see where the "good" signal dies and you pick up the noise? That's a super handy way to help narrow down the problem. Your soldering looks nice and clean. It's possible that there's something going on under one of the sockets, though :-( You could try to use a...

I'd love to see a pic when you are done - I wonder if the height and flexibility of the long pins will give you the room you need to maneuver the audio jacks where you need them. There's also this DC jack from Wurth electronics which I think is what the cheapie Taydas are modeled after, if you...

I saw that you were using the audio jacks with protruding barrels -- have you made a full size board like this with those kinds of jacks? One problem that I've had is that with the jacks protruding from the top, it's really hard to get the pedal into the enclosure because you can't get the pots...

Thanks for all of the feedback so far. I guess my experience with heavily-used USB-C ports is mostly with Mac laptops and those ports seem to be magical enough that I've never broken one despite a lot of jostling. I imagine there's a tremendous amount of engineering that went into that...

Apparently https://www.digikey.com/en/products/detail/recom-power/RO-0509S/2314944 is listed as a drop-in replacement. But they're pretty expensive! ( > $6 /ea ). I'm hoping to keep the per-port cost pretty low. There are some 1W DC-DC modules that are relatively inexpensive (~$2) that might...

I mostly got into building pedals to make stuff for my guitar playing nephews. The best I can say for myself is "well, I OWN a guitar". This year at Christmas, the younger of the two nephews was like, "Gee, Uncle @z2amiller, these sure are great but what I really need is a way to power a bunch...