Breadboarding an envelope follower based on the ARP 2600 schematics. Amusingly, what I have available to feed it a controlled source of notes to extract envelopes from is a Behringer 2600.
Top trace is the output of the B2600 AR envelope generator. Middle is the output of the B2600 VCA, with an audio triangle wave and the AR EG as inputs. Bottom is the output of the breadboarded envelope follower.
Soon you will have 2 2600s if you keep this up. 
Yes, but one of them will be a Kosmo 2600!
Just finished the next 5cm dual ADSR. It’s the simple Rene Schmitz version (I still had two PCBs left from my first batch) but the next one will be the full-featured revised one from @analogoutput 
I am happy with this one though, even if it has some edges…
Looking good! I like the fact that you printed the knobs!
Haha yeah thanks, that is still an ongoing adventure. I tried so many different designs but I think I now settle with this one. I like the haptics and and they are easily painted 
I finished the 4U QUADTUSSY I designed based on Peter Blasser’s Quantussy!
I used the original prototype petals that I made about a year ago from the cocoquantus schematics and modified them to match the cocoquantus v1 -
Now onto the city…
The 4U panel was fun to design and all in all it was fun to figure out!
Holy moly thats a lot of wiring!
I didn’t really care for the birch panel of my Kassutronics Slope in the context of my case. So, l made my own panel. If anyone has a Slope and wants one of the four extras, hit me up. They’re going cheap
Printed out a bunch of storage draws. These things are pretty awesome. Still need to work on getting caps, diodes, and transistors moved in.
These are very cool.
Would you be willing to share the STLs? I could use a few of those draws.
The panel looks like it was designed by Serge Tcherepnin but the circuitry obviously isn’t. In Peter’s stuff the form is of high importance. Serge’s designs seem to strive towards simplicity and uniformity. What motivated you to combine them?
They’re already available on Thingiverse and PrusaPrinters. Someone else suggested them to me in another thread.
https://www.prusaprinters.org/prints/7643-various-size-stackable-resistor-storage-box
Whats funny is a lot of people do not realized that Peter interned and eventually worked for Buchla for a while and a lot of Concepts and Designs within the CL architecture revolves around Buchla, ARP, and SERGE. 
Motivation in regards to Format - Banana. 
4U is standard for Banana Synths, and CL is just doing his own thing.
But check this out - This is a really old instrument Peter designed and used in his band
Sorry the pics are itty bitty - we do not have better pics for the og Man with the Red Steam.
And yes, the Panel is a Mile Marker. lolol
I’m currently testing the v0.2 (visible to the right) of Multi-Filt-O-Matic. I got some ICs in the post, so I started on it right away. The prototype (visible to the left) is working nicely but still there were some things I wanted to change, so I changed the PCBs a bit. Version v0.2 requires a new front panel, so I will certainly be busy this weekend.
I already have a few pedals I put together from kits in my setup, with the hope of adding a couple more. Of course I’ll be wanting to add a synth or two, 'cause you never can have too many, right? Seeings as my mixer is already full up, and that flexibly patching pedals is a pain, I thought a patch bay would be helpful, so I built a 4U rack so it would fit in with the next row of eurorack:
Cheers
Sorry for the dumb question but what is that “bus board” with the A and B rows? 
And another question: what kind of Adam Hall rack strips are those (the horizontal ones)? I decided to use the larger 6161 rack “strips” but I am totally unhappy with it since you need to know the number of mounting holes in advance and it’s a pain to add more. I thought it would be a good idea to have a flexible sliding rail but in practice… 
Not sure about Adam Hall but threaded strips are commonplace in Eurorack
Unfortunately they seem to exist only in Imperial spacing (with metric threads!) so are problematic for Kosmo, so I use slide nuts in Vector rails. Which as you say has its drawbacks but it’s the price of metric spacing.
Ah ok I see. Imperial spacing with metric threads is insane 
Maybe I just buy a whole bunch of square nuts and put tons of them in the rails…
