I added 3D files to the KiCad footprint. You can put the footprint and the 3D files wherever, but you may need to mess with the paths in the 3D Models tab of the footprint properties.
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That’s really good - thanks!
Could a new type of Kosmo arise from e-waste?
-Fumu / Esopus
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I’m sure it can be done, but also seems like - as they say - a right faff.
Honestly it would probably be a pretty fun project to try to do everything with recycled materials. Seems like the IC’s would be the most difficult bits.
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Made a stripboard version of the LMNC simple envelope, had a spare faceplate and put it in the top half, held together with twist-ties!
Wondering what to do with the rest of the faceplate now!
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Maybe a pencil sharpener in one of the holes!
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Spare holes → Passive LPG. Always!
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BlackDeath, do you have a schematic for a passive LPG? I tried making one based on a vactrol but it didnt work out so well. 
It would be a challenge but moving to the goal of zero waste would recede the impending demise of the planet. The iPod Touch rescue is of more interest because it’s pulling things from landfill and using every part. The scrounged IC’s will come from a whole device that could ultimately end up in landfill again and is a waste, bad. The printed objects, the boards and front panels could be completely reused material, good.
-Fumu / Esopus
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I have built a few using diy vactrols (LED + LDR + Electrical Tape), using some schematics on this forum (but I don’t remember which one). It took some playing with different capacitor values until I got the effect I wanted
Will need to try a bit more experimentation, last time I settled for a VCA / simple VCF from my attempts at making an LPG!
DIY Vactrols are cool, I have a pile of LDRs and LEDs waiting to be united.
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Quincas Moreira did a video some years ago:
His circuit’s ridiculously simple:
Disclaimer: I have not built this.
33k is a pretty big resistor for an LED unless it’s a superbright, maybe he talked about that — I kind of skipped through parts of the video.
As I’ve said before I’m not much of a fan of driving LEDs directly with CVs. More generally a passive circuit like this tends to have the wrong input and output impedances for ideal behavior in a modular synth. But it’s simple and if it works it works (and if it doesn’t it doesn’t).
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I made one more tweak to the vactrol footprint: Added a label for the LED cathode. Of course it’s already “labeled” by the bevel and you’d have to be talented to install the vactrol backwards, but what can I say, I like Ks all over my PCBs.
And of course it’s all for nothing if you install the LED in the housing backwards.
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Ive tried something like this before to drive vactrol led’s
Blue trace is input CV 0 to +5 V
Green trace is LED current (approx 0 to 400uA)
LED is superbright type
Not sure if this still qualifies as passive!!
I built this to drive my passive vactrol low pass gates.
Obviously that’s very not passive…
I followed the guide on the video linked above I think.
They didn’t really work as a LPG in my experience, more just a VCA with a fixed amount of filtering applied depending on the cap size. So I just have 4 with varying degrees of filtering I can patch to.
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Found this one Passive multiples, and more - #10 by saint_et_moudulard
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Trying out those Arduino Nano + Mozzi experimentation boards I put together a while ago, running a @HAGIWO DCO almost unmodified:
I’ll have more to say about those boards once I test them, document them, and experiment further!
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Doing a first test fitting of my SSI2130 VCO. It’s mechanically a bit challening, with 6 daughter boards that each have to sit at specific heights. Seems to come together though.
Also, I’ve got quite a bit of soldering and testing to do.
Happy I caught that backwards power header before blowing up a 20 euro IC. Not that I’d solder everything up in one go and hope it’ll all work, right? RIGHT?
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I want one! If you are doing a run of the, later
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