Made myself a little jig for sanding/chiseling a 10 degree profile onto 2 rails.
The point of this is when I glue the sanded parts together I will have a nice 20 degree profile for inbetween my 1U-Euro section on case 1 =)
Edit: Does this make me a mathematician or a crazy person =D
Just plain Crazy… 
So here is the demo of my first ever synth! I’m 17 right now so a big adventure is awaiting for me I guess 
It is not perfecr right now I have lots of thing to do but still, it makes some fat sounds!
and here some pics… it’s really messy yeah haha
Looks good and badass demo! I like when you tap on the case or pots and turning the power supply off and on for the 1v/o haha.
I want to build an internally patched synth like this eventually
Yeah I have some poor connections in there haha, but thank you!
Good luck with that 
Wow! I love the led case lights, very futuristic. Are they all custom PCBs? It sounds great!
Yeah! all the PCBs were designed by my brain!
Thank you a lot!!! 
I’m here to tell you that if you have a sudden desire for a simple AR envelope generator, you can build one quickly and easily. Or you can do what I did.
After enough dumbassery to fill an entire litany (but a boring one) I got it working. Put jacks and pots on an old reject panel but obviously this isn’t going to be mounted in a case like this.
Apologies for the hilarious wire colors on the jacks, those were from back in my youth.
Dang dude, your mind is much more able than mine was at 17… heck, even 27 lol.
I only watched 2mins but it sounds like the clangers found a stash of moon lsd haha.
My only pointer is that voltage reg’s should have their own heatsinks and not share =)
With a hacksaw and some time you should have enough heatsink for 3+ regs there.
Looking forward to seeing/hearing more =D
I glued my rails on case 2 and 3, Prepped a passive switching mult for soldering tomorrow. Now im just chilling with a Talisker while dad plays some batman before bed =)
Also, dark choc orange is awesome!
Hahaha thank you 
Well the regulator are mounted on plastic isolator (grabbed from a computer PSU) and with thermal paste. It doest heat that much and I don’t want to kill myself with saw, I may ask my dad to do it tho! But yeah I plan to make bigger heatsink 
And I will try to make musical things with this thing, just made a midi to CV module that love works… it still sounds pretty untuned but heh, it’s diy anyway 
I learned you should use separate heatsinks from the forum (most likely from AO).
Further reading seems to suggest you can get away with it in some cases if the regs are properly electrically isolated from the plate, but it can cause inefficient regulation resulting in odd voltages (perhaps the cause of your drops when tapping the case? Wild guess)
Your box would sound awesome with a bit of ‘side chaining’ and drums =)
Im thinking something like a BigButton, Wav Trigger and VCA.
Hacksaws arent hard to use, just draw a line and follow it with the blade =D
If I can figure hand tools out, anyone can! ha!
No the voltage are fine! I checked them with my trusty 1979 oscilloscope the Problem with the pitch is just a poor connection on the CV cable, I have to replace it
And yeah side chain is just… The best effect for good bass line !!! If you ever build one of those thing let me know ^^
And I’m gonna read that later, it’s almost 4 am
Is this the 7555 circuit minus the mosfet switch that you mentioned in the K25 thread?
there 's this simple one (tested also with succes by @saint_et_moudulard )
Thank you! If I have time today I’ll try to do it ^^
Hey circuits’s burners,
here are my last constructions:
I have add a CV control with a vactrol fixed on the decay pot pins, and it working enough good ! I have also add a passive volume control at the audio output. Really funny circuit ! 
More details here:
Have a nice and lucky day !!
Oh no. This is far simpler. This is what you get when you look at one of @CTorp’s k25 modules and say, “hm, too complicated for what I want”.
(Kosmodrome now has most of the basics, but lacks an envelope generator; I have one planned, which is indeed based on the Kassutronics ADSR, but I don’t have the parts for it yet, so I decided to throw this together to serve until I do.)
More small boards, ready for testing (well, almost).
The ICL8038 is an old voltage controlled “precision waveform generator” from the early seventies, a bit like a fancy 555 but with square, triangle and (piecewise linear) sine outputs. They’re no longer made, but you can get “function generator” kits for almost nothing from the usual sources.
I recently found a kit in my collection of random things I apparently had plans for, but never got around to do anything with. At first I thought I’d build the kit as is, but the output levels are a bit weird so I decided to add some level shifters. Then I googled to see if someone had done something similar, and found a Thomas Henry design that did just that, so an EasyEDA session later I had a couple of boards in my standard form factor, without having to do any calculations myself.
Henry’s build is mains powered, but I’m aiming for something a bit safer – and more compact, of course (to be continued…).
I’m lovin’it !! I have mod a lot of icl8038’s/XR2206 cheapy function generators who come from ebay , I used them for build some LFOs or multi-oscillators banks.
Nice work !!
Some cool ideas:
*A LFO with icl8038 :
*VCOs with XR2206 :
From this site :
http://pjmnc.free.fr/rg
