Welcome! Thanks for this. Do let us see it in operation sometime. Cheers .
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I like the tight layout but shouldn’t the four NTC thermistors be in contact with the two transistors and the two transistors with each other for this to get a chance of working in tune?
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I hear what you’re saying, but the Klein EDU kit they sell isn’t arranged in that way, the thermistors are not coupled to the transistors, and honestly, I haven’t had any noticeable problems, though I have coupled the transistors together on mine as a half-hearted attempt to be scientific.
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On my build the transistors are arranged the same way. It’s the closest you get them together on stripboard, but if the legs are left longer you can easily couple them together using zip ties, thermal tape or shrink tube
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Kassutronics KS-20 / Korg MS-20 VCF with “crazy mode” switch for when you want to perform like Hendrix. I may have some pots back to front here, don’t think so, but maybe 
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(Until of course that URL goes belly up. So, best to make sure the Internet Archive has it.)
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If anyone wants to join in finalizing the code for our community - I have opened a new discussion : Hagiwo 6ch drum sequencer + 4x4 matrix keypad.
Hagiwo code: https://note.com/solder_state/n/n17c69afd484d
MY sourse code: GitHub - Kozak-derezak00/drum_trig_seq_6ch: in this project is a module 6 channel trig sequencer from Hagiwo, but with the addition of me matrix keyboard 4x4 to control the steps of the sequences, the code is very raw and not attractive but WORKABLE, sketch uses 97% of the resource arduino nano.
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Transistor matching “rig” based on https://www.dragonflyalley.com/synth/images/TransistorMatching/ianFritz-transmat0011_144.pdf
Uses 14-pin ZIF socket (under $1 on Aliexpress).
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Some suggested best practices for stripboard posting:
Also, it would be good to indicate the orientation of the diodes.
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The diode orientation is as per the layout, where the marked end (cathode) of the diode is visible, therefore upwards when installing on the board.
I don’t see how anyone can tell that by looking at the layout. Adding a note (to the image) explaining the orientation would be very helpful. Images tend to get separated from text so it’s good to have that on the image itself.
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I would never have known this about the diodes. It is just good practice to just always assume that people are not going to understand and mark things accordingly.
Also, if we could keep things civil and not escalate - we would all appreciate it.
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As a person who’s been a member of this forum for 22 months, and has learned nearly the entirety of what was necessary to build a case and modular synth with 30 plus modules within that time from this site including how to read and post a schematic here to advance my efforts toward that goal with success, it is not apparent at all to me how those diodes are oriented. A few lucky assumptions would be necessary for me to get a working circuit from your verified layout as per the orientation of the diodes. I might add that I would have had very little chance at success building the synth without the help of @analogoutput specifically.
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As a member of this forum for 3 and a half years, what I can say is that since the beginning @analogoutput has always been the first member to help with my stupid questions and point out the mistakes I make. I am immensely grateful for all the help he provides me here and through his content posted in repositories across the web.
As an electronics hobbyist for 35 years, what I can tell you is that it is not clear to me how these diodes should be oriented looking at their layout. And it’s even more confusing for a beginner, who @analogoutput was worried about when he pointed out these observations to you. There are important reasons why things are done this way and if you had taken a few minutes to read the link he pointed you to, perhaps it would have helped you clarify some of those reasons.
As a tenant of this world for 50 years, what I can say is that before trying to understand how machines work, it will be much better if you first try to learn how human beings work, even just a little and become one.
“Human After All…”
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nicely done compact delay layout, i managed to squeeze 2 minidelays on one piece of stripboard and wayy satisfied with the sonics and footprint. thx bruh 
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@rob Thank you for contributing. We have guidelines for some very sensible reasons. @analogoutput simply was very calmly explaining this to you. I am sorry that you feel this was pedantic, however you simply do not need to get -this- upset from a suggestion that you follow community guidelines.
This place is actually very lax, so if you’re carrying some assumptions about bad-faith shitty behaviors you may experience on the reg in other places, thats simply not the case here.
Just dont assume the worst in people.
(note: just to prove how lax this place is, this is days late lololol)
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i didn’t see the contentious post and don’t want to harp on it but i just want to say Rich is always extremely generous with his knowledge on here. Strongly opinionated, sure, but that comes with the territory of being someone who knows his stuff. You don’t have to take it all as gospel but you’d be wise to pay attention to his advice.
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