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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
Euclidean rhythm generator
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jeanpat



Joined: Jan 15, 2018
Posts: 7
Location: france

PostPosted: Mon Dec 24, 2018 8:54 am    Post subject: Reply with quote  Mark this post and the followings unread

Thank's again
thumleft
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interstellar obscure



Joined: Mar 02, 2024
Posts: 2
Location: portland OR

PostPosted: Sat Mar 02, 2024 2:18 am    Post subject: Reply with quote  Mark this post and the followings unread

PHOBoS wrote:
If I recall correclty Q0 is used as a rest position when the reset input is high because the 4017 has no option to disable
the outputs. It might be possible with a different design to use the CLK enable pin to hold the counter on the last step
but that would still give you 9 steps max.


It's amazing that this was designed entirely with logic chips; feel like I've been looking for something like this forever, and it was here waiting all along.

would it be a simple matter to cascade 4017s in a way to get 16 steps and 16 pulses? From the 4017 datasheet:

Posted Image, might have been reduced in size. Click Image to view fullscreen.

I should try breadboarding it first to see how much one can do with 8 steps, but
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PHOBoS



Joined: Jan 14, 2010
Posts: 5591
Location: Moon Base
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PostPosted: Wed Mar 06, 2024 11:48 am    Post subject: Reply with quote  Mark this post and the followings unread

I designed this too long ago to be able to give a quick answer if it is possible or not.
There might be a way to use chained 4017s for more steps but I don't think you can simply replace the current counters
with a couple of chained ones. At the very least the 4029 would probably need to be wired up a bit different too.
You'd also need some larger switches of course to select the number of pulses/steps. The current circuit doesn't
use the CE inputs of the 4017 counters so at least those would be available for chaining.



also
welcome party!

you might like this one as well https://electro-music.com/forum/post-441325.html#441325

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interstellar obscure



Joined: Mar 02, 2024
Posts: 2
Location: portland OR

PostPosted: Thu Mar 07, 2024 7:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

without completely understanding the logic, was hoping there might be an easy solution for 16 steps. Nevertheless, thanks very kindly for your thoughts, and for the original post.

I just love the idea of getting this complex rhythm generator without any microprocessor. Particularly with timing/trigger circuits, I feel like CMOS still provides more reliable results.

I'll breadboard it and see what I get. Was hoping to make a stand-alone rhythm box similar to this commercial eurorack module:

Posted Image, might have been reduced in size. Click Image to view fullscreen.

https://www.youtube.com/watch?v=XU1LVE8WlIs
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