Been a lil bit since I posted some progress, still missing a few components, but Ive been working on some bits Twin T Drummer, Filter GRR and the Doom Drone.
Been organising the layout of the synth and its starting to feel more ‘synthy’
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Long time no (proper) post.
Life has been relentless and I’ve been doing less and less fun things, but I need to get back to the distractions I enjoy and not the ones I endure.
Trying to tidy up my workspace, I found my stash of AS3340 that I got a deal on still sat in their antistatic packaging and that helped me snap out of things. Googling for a simple circuit for swift gratification I found the breakout board that @Sonosus put up on Github last year, so I decided to give JLCPCB a go and get some made. I didn’t make Sonosus’s mistake and avoided the white solder mask like the plague - been there, done that, used too much IPA to make it look acceptable afterwards - and got some nice red boards fabbed instead.
I put the first one of them together over the past few days and it works nicely!
I used what was on hand so the less mainstream resistor values are achieved by, where possible, using two in parallel and, where not, in series.
Next step - proper pitch pot and some calibration so it can be played for realsies.
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Good to see someone else getting some use out of my designs. FYI I’ll be releasing some proper documentation by Sunday to document which components you can leave off to remove certain features.
(@Moseley meant to PM you but ^^)
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Excellent 
So that I could follow along with Sam’s original schematic I worked back to annotate your board with the same component designations for the pots and values where they were missing - obviously you don’t need it but it might be handy for someone else…
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Huh nice. Mind if I add that to the docs?
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No problem at all, go for it 
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Just found out that film roll cases are perfect fit for the basic rotary switches. I built a simple passive diode clipper in one (with 10 different diodes 
). There is also enough space to fit some stripboard inside to help with wiring.
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Brilliant, utterly amazing repurpose. There are so many variations to a set up like this. Audio, signal, logic, my head is buzzing. Many thanks.
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I’ve made a passiv mixer with this film box style (mine is no longer very round because 3 jacks socket inside
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Cool, I’ve always wanted a clipper I can lose easily! 
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I like to build those kind of small utility-things. But I forget to label them and I’ll just have small boxes with jacks without any idea what they do. Sometimes I need like something to split stereo to two mono outputs, so it’s hard to test what each box does without opening them 
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Just joined so figured I’d share my (obviously) DIY build. 50x40 case to take 20cm panels.
Top row is 40106 oscillator bank, a simple note generator, a 8ch buffered mixer, simple LFO, noise module, big button in a panel.
Bottom row is a +/-12V and 5v supply, buffered/unbuffered splitter, 4046 V, not working avalanche, 808 kick, and a 358 oscillator not working yet. VCA is currently being built.
My panels are typically 2cm with stripboards mounted at a right angle via a bit of plastic glued to the pots/jacks
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That’s a nice colourful build! I also used to be able to use the empty space in my case to store half-built projects and patch cables. Not anymore…
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Thanks! Did the bright colours for the kids mostly but I quite like it too. They mostly like the little note generator as they can just mash buttons and make sounds
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I have a bucket load of 40106 ICs here. Have you got a strip board layout or circuit diagram for the note generator? Thanks.
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It is super simple based around fixed resistors and the buttons all paralleled up into a single opamp with a cap to oscillate at set note frequencies then buffered. So if you push two buttons it will parallel several resistors and sound wrong and too high. Using a 40106 you should be able to get 6 independent notes which is nice!
I’ll dig in my search history later and share the project I followed and I’ll post my layout
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Nice work mate. Do you have a diagram for the 40106 oscillator bank?
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I think if you substitute the pots for fixed trimmer pots you would be able to tune it nicely. And add buttons
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Been getting some modules finished and tuned today. Filter GRR and Tin T Drummer.
Had a little play about and think I have to do a bit more reading about fixing my other modules, some seem a little sus.
8Step seems to be going to fast, clock in seems multiplied. Rene H/LPF seems a bit odd too, GRR seems off too… but they’re in the case at least.
Also got some UV lights and finally get to see the case glow in full glory =D
I’ll post a pic in Mail Day thread later.
May aswell post them here =)
Big light on…
Big light off =D
Definitely need some uv knobs… or uv paint.
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