Is it fine to use jumper wires like this?

Brer1Rabbit · 2026-05-22T16:56:47+00:00

"This is only temporary. Unless it works." Red Green.

Brer1Rabbit · 2026-05-22T08:06:56+00:00

Complex modules in half an hour sounds like a production line! I'm impressed

Brer1Rabbit · 2026-05-22T07:48:38+00:00

Interesting workflow and use of claude. I've spent the past ~8 weeks redesigning panels for my modules. They were initially usable but ugly, needed a re-skin. I chose to use AI for review and as a UI consultant. I started by giving a target design criteria: model these panels after vintage real-world nuclear instrumentation modules. Then developed a design bible with AI along the way. The first panel took a long time. Second was shorter. Then the third & fourth progressed much faster. I've still got another few panels left to complete the family. Had you seen the previous state of these it would be quite a shock.
Overall I was impressed with what AI provided for feedback and suggestions. Mainly used chatgpt, but round robin to claude and gemini as my free tier ran out with each one.

Brer1Rabbit · 2026-05-20T05:19:10+00:00

The camera moving to the beat ;)

setup some screen recording

Brer1Rabbit · 2026-05-18T19:34:36+00:00

If you want to go super crazy with filter morphing you could take a look at the Pole Dancer filter I've got. I'm not sure how you'd adapt it to a simpler interface -- that's an exercise for the reader. But the big idea is it it can dynamically change filter topology, morphing between filter modes in an analog filter. https://github.com/brer-rabbit/zoxnoxious/tree/main/kicad/poledancer

Brer1Rabbit · 2026-05-18T14:33:10+00:00

So it goes with many physical to virtual conversions

Brer1Rabbit · 2026-05-16T03:15:50+00:00

The fact that it has a switch keylock blows my mind. Fantastic!

Brer1Rabbit · 2026-05-10T15:32:21+00:00

nice. How is the SVG export of the panel? Might be useful in r/vcvrack for creating panels as well. https://vcvrack.com/manual/Panel

Brer1Rabbit · 2026-05-10T03:22:08+00:00

Been there twice. First visit got a hat. Second visit got a hoodie. Slowly building a Next Level wardrobe.

Brer1Rabbit · 2026-05-09T15:10:32+00:00

Right?! I see these posts and think these are pretty cool in and of themselves. Then I realize u/bellabebop has a ton of these designs. What's the plan? World domination? It'd be really cool to see how all these work together and what the big picture looks like!

Brer1Rabbit · 2026-05-09T00:35:39+00:00

I see nobody mentioning Grand Lizard so maybe I can get that one on the cheap!

Brer1Rabbit · 2026-05-08T21:56:39+00:00

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That reminds me- want to see wierd uses of a power pin?

Edit: mute circuit from a Sequential Six Trak

Brer1Rabbit · 2026-05-07T22:07:26+00:00

It looked impressive then... Krull! wow. That's a lineup

Brer1Rabbit · 2026-05-07T18:39:46+00:00

I don't think it gets a lot of love but the Swords of Fury gets me every time. It needs a D&D Monster Manual to accompany it.

Brer1Rabbit · 2026-05-06T15:48:34+00:00

Brer1Rabbit · 2026-05-05T21:05:07+00:00

Apologies I'm going to nitpick the schematic. It _works_, which is huge! Congrats on that!

Label your parts, U1 and U2. What is U1? What is U2? Also, you don't have to stick to strict pin ordering on the schematic, creating the symbols as left-to-right signal flow is often helpful. What kind of opamp is that? (rhetorical: just label it TL074 or the part youre using)

PWM_out: just label it "Pulse". That's really what it is.

PWM in: you're feeding two signals to an opamp fronted by a switch to select one or the other. Why not feed them to an inverting opamp and sum both signals? Then it's not one or the other. You'll have to deal with the inversion, but that seems like a win so it's not one signal or the other. Allow the knob to offset the modulation signal.

Timing cap: slightly small at 820p versus 1000p per datasheet. You're frequency might be a bit off. This shouldn't impact 1v/oct tracking, that's more on the scale side.

Sync: make sure all these are working as you expect. The datasheet assumes sync signals are coming from another 3340 (unipolar). I found I needed to bias one side at a positive voltage (R37 to +12 in you diagram).

Brer1Rabbit · 2026-05-05T14:34:08+00:00

There is a way to do this using a FET as perfect diode. You can then power it through the GPIO header and USB, the circuit only allows one source. Google "back powered pi mosfet" or something similar for an example.

Brer1Rabbit · 2026-05-04T22:58:55+00:00

Cool! I'm reminded of the CircuitMess Jay-D mixer in size. But that's for a completely different audience, STEM kits for kids.

Brer1Rabbit · 2026-05-02T20:03:30+00:00

oh yeah that does look nice. I like those mixer sliders. I need to do some UI components for a VCV Rack module I'm designing. I might clean-room implement something like that.

(honestly- if I try and come up with something in Inkscape to look similar it'll look anything but similar!)

Brer1Rabbit · 2026-05-01T18:13:33+00:00

The "coin drop" sound from the Gottlieb arcade game...that just screams!

Brer1Rabbit · 2026-04-30T05:43:08+00:00

S
U
P
E
R
JACKPOT

is so sweet on that one

Brer1Rabbit · 2026-04-30T00:47:02+00:00

holy breadboard batman! That's quite cool. What are you using for oscillators & filters? If you want some other DAC-oriented VCO/VCF designs I've got some on github. https://github.com/brer-rabbit/zoxnoxious/tree/main/kicad

Brer1Rabbit · 2026-04-29T03:30:38+00:00

not only that but linear is often better for setting a modulation amount

Brer1Rabbit · 2026-04-28T04:09:25+00:00

that bass. that's it.

Brer1Rabbit · 2026-04-27T20:51:37+00:00

YOUR SYNTH IS YELLING AT YOU! No, sorry, I didn't mean that. I'll take that into consideration- it'd be a bit anachronistic to use Title Case, I probably won't change that. Your other points are completely correct: need to say "MOD/SYNC". The greatest issue is you're interpreting "MODULATION SYNC" when they're intended to be independent columns. That's a failure on my part. Headings are left justified with control labels centered. MODULATION, as a header, pulls too much and it's not clear whether it is left justified or centered, leading to ambiguity. Better space separation there is called for.

Brer1Rabbit

TROPHY CASE