Befaco Kickall in Kosmo format

you can swap out the LED in the slider for one of any color you like, the LED is a standard part, although it is slightly smaller than the standard rectangular LED. You could even drop in a bipolar 2 color LED if a design needed to show 2 different states.

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I ordered a green 50k and a red 100k, so maybe I can just swap the LED.

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The LEDs are super easy to swap. Thanks for the tip.

The kick is up and running. I ran out of trim pot before I got it adjusted to 1v/oct, but it is close. Is it a larger or smaller resistor that I need in line to get the tuning lower?

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I had the same issue, but it was close enough for me xD if you find what needs to be changed, please tell me :slight_smile:

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In the 3340 datasheet, the LMNC 1112, and the Kassutronics VC3340 the fixed resistor is 24k, while it’s 22k in the Kickall. So try higher?

Or you could tack a large resistor in parallel with the 22k and see if that helps, if it makes it worse you need to increase the 22k.

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My first attempt at ordering PCBs has been less than successful.

I attempted to order through JLCPCB. I dropped the zip file with the build documents on the “add gerber file” slot - but the order preview screen was blank when I got there.

Any ideas?

Have you tried clicking on “My File” to see if your upload is there? If it is you should be able to submit an order for it, if not then the upload probably went wrong.

Sometimes when I submit a Gerber it fails to show a preview at the top of the order screen, but it’s there in My File. I don’t know if that’s related to what you’re seeing.

Check that you’re submitting the right documents. Are you using Sebastian’s version? The Gerber files aren’t in the GitHub repo, so you’d have to open the project in KiCad and export the Gerbers from the PCB layout window. Or use the makefile, presumably, but the kikit fab command would have to be uncommented. And, uh, you’d have to install kikit.

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Ahhhh… I thought I just had to throw the whole zip file on there. Makes sense.

I’ll give it another shot - hopefully on Monday.

So yeah… it’s a little involved…

The KiCad project has 3 PCBs: main (B2), controls (B1), and panel (B3). With kikit it’s not too hard to prep the Gerbers but getting that going is probably more trouble than it’s worth, easier to: Go into the PCB window, delete two of the boards, export Gerbers and drill files for the third, undo the delete, delete another two boards, export Gerbers/drills, undo, delete remaining two boards, export Gerbers/drills. Then zip up the three Gerber/drill folders, one zip file for each, and upload them one at a time to JLCPCB.

JLCPCB has an article on how to do the Gerber/drill exports

(That’s for KiCad 7, there are similar articles for older KiCad versions.)

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If you are in the US, I have an extra PCB set.

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That would be fantastic. In Ohio USA - just send a message and we can hash things out.

That takes under fifteen minutes, but it still the most irritating thing. I think that could be scripted away, either full from within the KiCad, or having a some external script to split pcb-file into separate boards. That’s actually quite easily doable as the saved files are quite easily readable xml/yml/etcml.

I think kikit can do exactly that :slight_smile: you need to add some label to the pcbs and then it knows how to split

I always wanted to add exports and checks through GitHub actions (or however that is named in codeberg, once I find the time to migrate) but you know how this is with these plans :wink:

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Yes, it does, and I use a Python script to do that and generate schematics, BOMs, etc

Not worth setting up just to do one set of Gerbers for one module of course.

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I got this thing racked and started playing around with it today. At first everything seems fine - it triggers perfectly, controls are all responsive, it sounds great … but after a few minutes I notice that the pitch is creeping up and up and up and up very slowly until it’s just chriping. The only thing plugged into it is trigger and output. The pitch knob actually still functions, but the overall pitch creeps up and up forever.

I reflowed everything just for good measure. Then I got out the ol’ mutable module tester to calibrate/tune this thing. I’ll be damned if the pitch doesn’t appears to be LOWERING over time now - approximately a semitone every 1-2 minutes.

EDIT: Well, I unplugged it and let it sit for about 30 minutes to see if the pitch reset. It doesn’t. In fact the pitch is now increasing. I suspect what I’m seeing is normal analog drift, but at a much higher rate than I’d expect for being indoors on my kitchen table.

EDIT2: I think it’s probably good now. It’s drifting up/down but within a semitone or two after over an hour. That can probably be attributed to the furnace cycling. The multi-octave bird-chripy increase hasn’t happened again.

This problem just got WAY weirder. Somehow the Euclidean sequencer that’s in the rack … and not patched to ANYTHING … causes the Roundhouse to freak out. The Roundhouse is the only thing patched to the output in this video. So it has to be RF or something on the power rail. I see no problems on any other modules connected to this PSU, digital or otherwise.

Does it work fine when unconnected from the sequencer (like, with manual gates from the test rig)?

It’s a power issue. I’ve got this rack running through the AI Synthesis PSU and I don’t think the 1A it’s got is sufficient at all with all the digital stuff in this case and the high LED count.

To answer your question, there was nothing plugged into the sequencer at all other than power


@AI-Synthesis can your PSU and its bus board handle a larger wall wart or do I need to upgrade the entire thing?

EDIT: just saw that you have a newer high power supply. Just placed an order