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Isn't that the connection for an LED? It goes low when the pedal is on. It would work as an active low switch for Arduino.

I suppose doing it at the bypass switch could be an option--there's often a bit of unused space down there. Madbean's Road Rage, for example.

TEquipment has a good selection, and their prices on Kester 44 are competitive, so I'd imagine it's the same for flux. I bought my FX888d from them, and it was a smooth transaction with lots of updates. It seems like Circuit Specialists should probably be in the discussion, but I haven't...

In Eagle I always did the radius last, but in Diptrace it seems useful to do it early, because the outline shifts leftward by the radius amount. But you can fiddle with the points themselves too.

I've been working on a box for a Grind Customs Aeons. Here's a screenshot of using guides from measurements. I measured the outer pot distances as 36mm (center holes). After dragging the reference point to the center, I placed vertical guides at -18, 0 and 18 (you can select a guide and enter...

I don't trust the dimensions of anything pasted/placed in Illustrator, though I'd expect placing to more likely retain dimensions. But I do it frequently with boards that don't have drill guides, or drill guides that aren't in metric, or using side mounted jacks, etc. I use a screenshot. Here's...

Just to dispose of possible issues, remember that P2N2222 has a different pinout from 2N2222 and PN2222. Doesn't look like it's at play here, but it's burned me a couple times....

If I think a board will work in a 1590b, that's my preference. I have a couple Boss pedals that aren't leaving anytime soon, so no point trying to standardize with top mounted jacks. On the other hand, Boss pedals are taller than 1590b, so the benefits of the lower height aren't complete. Kind...

I'd be all about this. EasyEDA isn't the only PCB software I'd ever use, but for making boards to be fully/partially assembled by JLC, I'd rather confirm as many parts as possible in the design phase. Alas, so many sketchy user-contributed parts! I wonder if there's a way to make a...

Drag guides from the rulers to mark the center (Illustrator will indicate the center and lightly snap to it). Then, drag the top left corner area of the rulers to the center point. It will snap too. You can check it by putting guides on the sides of the box and making sure their distance from...

Whatever this is. Actually, it's 300mS. So, 300mS is enough for me.

Goes to show, you can't trust the Texans. Kidding!

Eagle is being discontinued in June 2026. IMHO the only reason to use it is if you're already settled into its paradigms and two years is a pretty long time. Plus, there are still a lot of open/shared projects that are in Eagle. Otherwise, KiCAD is the better choice of those two, to invest in...

I like it in a Rat. Its slew rate is listed as 0.4 V/us, compared to the LM308's 0.3 V/us. I can't hear the difference between it and a 308, but an OP07 is probably as good a choice if a 308 isn't available. I have a 307 in a DOD250 and am really getting along with it. But that could be as much...

Small Bear has some silicon "dot" transistors sorted by gain. I got some of the low-gain ones for Sziklai pairs and they tested in the advertised range on the TC-1. Searching for "silicon dots" should turn them up.

They should be in the linked Dropbox folder in the first post of this thread (you'll need to login): https://www.madbeanpedals.com/forum/index.php?topic=17740.0

Only one I know of is at Fuzzdog: https://shop.pedalparts.co.uk/product/ogpcb

I've gotten some good Ge transistors from Ebay lots... amid a majority of low gain and/or leaky ones. It's nice to have a stash and the low-gain ones can be put to some use, but I'd look for tested single transistors, or sets. For example, these always seemed like a good deal...

I use a version of the T12 for most soldering work at home. Its display is simpler but AFAIK the tip control is the same, or probably a little more sophisticated in newer models. I relegated the Hakko FX888d to my office at work because the T12 is easier to use and I can stash stuff on top of...

It's an important subject, and that makes it important to support his claim that Chinese counterfeit goods equal organized crime. He doesn't. Absent some evidence that Chinese counterfeit guitars are connected to organized crime in the sense that he uses the term, it isn't the case that buying a...