My build progress

Just put the YouTube link on a line by itself, no brackets or other stuff. It’ll embed.

2 Likes

Hero VCO built on revised PCBs — not thoroughly tested yet but looks good so far. Maybe I got the boards right this time! Or right enough.

16 Likes

I started working on a few classical types of filters. The MS20 is one of them. I just finished soldering everything together.

Now for some rigorous testing …

13 Likes

image
image
image

Quite happy with my progress! S&Hold, precision adder and Turing machine work really well, I have really strange behavior on the lattice (mutable grids clone) and I have not yet written any code for the quantizer. So, yes, the problems begin when the arduinos come in :wink:

12 Likes

Did you see my Halting Machine comment on Github? The clock LED cathode is unconnected in the schematic and PCB layout.

1 Like

A lot of 3D printing experiments for future panels today. When I start working on a bigger system than the one documented in my CMOS synth thread, I’d love for it to have a Y2K translucent aesthetic, with LEDs underneath diffused by the panel. What’s the point of DIY electronics if you won’t even show off the electronics themselves, innit?

Older experiments at the top, today’s series at the bottom. All are deburred but none are sanded. I’m changing only 1 parameter each experiment.

I’m using this post to dial in my settings—there’s a lot of contradictory advice online about how to achieve the best translucency, but this post has the least worst info. The high impact factors are to use PETG, print hotter than the filament is rated (I go up to the limit of my hotend, 260°C), disable part cooling, never alternate patterns on any layer, have 100% infill, print as slow as possible (it hurts), and use small layer height (there’s contradictory info about this, but example 4 shows 0.2mm layers look much worse than 0.1mm)


I hope I can improve it further. Remains to be seen how impact-resistant it is once it’s a 20cm tall panel, because if I can’t make it strong… Might as well look into cutting acrylic.

8 Likes

No, I have missed it, thank you for spotting it!
edit: fixed it up :slight_smile:

2 Likes

MS20-Filt-O-Matic has passed the test, so I treated the contraption with a front panel!

I added two experimental bits to this renditon of the MS20 filter. A switch that makes it possible to choose between 2 LEDS or 2 chains of diodes to restrict the resonance. For some reason I thought that could make a tonal difference, but I can only hear amplitude differences when switching between them. So in v0.2 I will leave the switch out, I think.
The vactrol I added to the circuit allows for some control of the resonance, which is a nice extra to have.

I will put the schematic an gerbers on my github in the coming days.

7 Likes

After much work and failure, and tinker, I finally got my single 4U coco clone working!


Here be the schematics…


:smiley:

How do I know it works… I own and fully restored a 20 year old cocolase recently, as well as own a cocov2 :slight_smile:

My clone is kinda a v1.5, as I used the v1 as the basis of it and added all of the mods peter figured out over the years to the looper section, but left out the altered dolby cargocult in favor of the original version. :slight_smile:

11 Likes

Haha nice one @d42kn355 I like your flow charts :laughing:

Today I finally had a bit of free time and finished a (little bit sloppy) PCB layout of the LMNC Quad VCA 1183 in a 100mm x 100mm format (i might build a small eurorack-format case due to lack of space :wink: )
Nothing ground breaking but at least “progress”.


11 Likes

Crazy, funky, and I don’t understand it at all. I love it.

5 Likes

Thinking of putting my modules in one of these flight cases, not sure how to attach the supports of the face plates. I could just put strips of wood across and screw them in from the outside, but is there a cleaner way?

5 Likes

Maybe build a wooden structure and glue it in?
Will the lid have clearance for knobs/switches??

2 Likes

Good idea, just doubled check the knob clearance, good idea! Pulled out the bottom padding and it should just fit

2 Likes

i have a little test case ( never finished ) just hot glued two strips of wood and it was fine.

3 Likes

its an 8 bit looping delay utilizing logic and RAM :smiley:

2 Likes

I suppose this probably means something to somebody

image

1 Like

:smiley:

“it is an expander”

4 Likes

I was showing someone how the dolby cargocult preamps work by enveloping an audio event and noise gating whatever was in the buffer.

figured i’d share it here too :slight_smile:

6 Likes


VCLFO build worked on the first try. But I really need more lfo:s. This can be the main complex one, but a pile of simple triangle lfo:s would be nice.

16 Likes