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gasboss775
Joined: Jan 02, 2016 Posts: 217 Location: Scotland
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Posted: Mon Feb 15, 2016 10:19 am Post subject:
Can't find any Twin T type CMOS drum circuits Subject description: Looking for directions |
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I've just started posting here, though have visited the site frequently.
Trying to find schematics of simple twin T oscillators using 4069 hex inverters for use in percussion circuits. Despite my efforts I can't find anything on here, can anyone help? |
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synaesthesia
Joined: May 27, 2014 Posts: 291 Location: Germany
Audio files: 85
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gasboss775
Joined: Jan 02, 2016 Posts: 217 Location: Scotland
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Posted: Mon Feb 15, 2016 5:17 pm Post subject:
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Thanks synaesthesia. The hackaday stuff is good, but I'd had trouble finding the article on 4069 drums. I already understand the principle of it, having built such circuits around opamps, but just wanted a practical circuit using the 4069, as a starting point for experimentation.
The page is now book marked. I have a healthy collection of 4069 chips, at least 15, hope to get started on some more drum circuits soon. |
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AlanP
Joined: Mar 11, 2014 Posts: 746 Location: New Zealand
Audio files: 41
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PHOBoS
Joined: Jan 14, 2010 Posts: 5591 Location: Moon Base
Audio files: 705
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gasboss775
Joined: Jan 02, 2016 Posts: 217 Location: Scotland
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Posted: Tue Feb 16, 2016 5:58 am Post subject:
CMOS drum machine |
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PHOBoS wrote: | Psyingo made a full CMOS Modular Drum Machine which included some Twin-T's.
All the links are dead though , but maybe you could ask him about it. |
Thanks PHOBoS. I've sent him a private message.
GB. |
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gasboss775
Joined: Jan 02, 2016 Posts: 217 Location: Scotland
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Posted: Tue Feb 16, 2016 6:25 am Post subject:
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Found another relevant thread: HERE |
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gasboss775
Joined: Jan 02, 2016 Posts: 217 Location: Scotland
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Posted: Fri Dec 22, 2017 2:01 pm Post subject:
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PHOBoS wrote: | Psyingo made a full CMOS Modular Drum Machine which included some Twin-T's.
All the links are dead though , but maybe you could ask him about it. |
Would love to have seen this PHOBoS. I sent him a message last year but never got a reply do you know if he ever comes on here any more. Also, do you know of anyone else who has built a CMOS drum machine? |
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PHOBoS
Joined: Jan 14, 2010 Posts: 5591 Location: Moon Base
Audio files: 705
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Posted: Fri Dec 22, 2017 7:02 pm Post subject:
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It looks like the last time he posted something was in 2013, I might have seen him in the chatroom later than that though.
Maybe you could try the email in his profile info but I have no idea if that is still valid. I actually wonder if I saved the project
somewhere, will have a look but it if I have it it is probably buried somewhere on an older harddrive.
As for another drummachine, Cynosure designed the UM-TSS which uses some cmos chips. And, as alan already mentioned,
I made the RGB Shroom drums which I like quite a lot. You might have to experiment a bit with the values though as they
are dependent on the supply voltage. The high bongo self-oscillates at certain settings with my current supply but that can
be a nice effect sometimes. I think the bass drum is really nice especially combined with a bit more punchier kick. _________________ "My perf, it's full of holes!"
http://phobos.000space.com/
SoundCloud BandCamp MixCloud Stickney Synthyards Captain Collider Twitch YouTube |
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gasboss775
Joined: Jan 02, 2016 Posts: 217 Location: Scotland
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Posted: Sat Dec 23, 2017 10:08 am Post subject:
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PHOBoS wrote: | It looks like the last time he posted something was in 2013, I might have seen him in the chatroom later than that though.
Maybe you could try the email in his profile info but I have no idea if that is still valid. I actually wonder if I saved the project
somewhere, will have a look but it if I have it it is probably buried somewhere on an older harddrive. |
PHOBoS I have sent you a private message regarding Psyingos drums.
Quote: | As for another drummachine, Cynosure designed the UM-TSS which uses some cmos chips. And, as alan already mentioned,
I made the RGB Shroom drums which I like quite a lot. You might have to experiment a bit with the values though as they
are dependent on the supply voltage. The high bongo self-oscillates at certain settings with my current supply but that can
be a nice effect sometimes. I think the bass drum is really nice especially combined with a bit more punchier kick. |
Thanks, I am going to try out your RGB drums and the Cynosure ones, though I think I seen them around 2012 when I was on here under another user name, I don't think I ever actually tried out his circuit's. Synaesthesia has also posted a few simple CMOS drums which I will also try out. |
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Cynosure
Site Admin
Joined: Dec 11, 2010 Posts: 966 Location: Toronto, Ontario - Canada
Audio files: 82
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Posted: Sat Jan 20, 2018 9:17 pm Post subject:
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Yes, Psyingo disappeared. He still posts the occasional video synthesis video on Youtube, but he doesn't reply to the comments there too.
His drum synth was really cool. I got to check it out in person before he went awal.
Try a regular OTA schematic, replace the opamp with a 4069, and adjust as to get the desired sound. _________________ JacobWatters.com |
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pbalj
Joined: Feb 10, 2018 Posts: 1 Location: Toronto
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Posted: Sat Feb 10, 2018 1:07 am Post subject:
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psyingo exists only in the video realm. |
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J-chot
Joined: Jan 20, 2014 Posts: 44 Location: Decatur AL
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Posted: Thu Nov 08, 2018 6:40 pm Post subject:
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here's some
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gasboss775
Joined: Jan 02, 2016 Posts: 217 Location: Scotland
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Posted: Sun Nov 11, 2018 1:20 pm Post subject:
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Thanks J Chot.
I've seen those 4011 based circuits before but not the other one using discrete components, will need to give it a try. |
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J-chot
Joined: Jan 20, 2014 Posts: 44 Location: Decatur AL
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Posted: Mon Nov 12, 2018 10:15 am Post subject:
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Those are psyingo, aka Phil B.'s schematics, btw |
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