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Richarius
Joined: Feb 22, 2014
Posts: 81
Location: Kitchener, Ontario, Canada
Audio files: 1
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 Posted: Thu Jul 20, 2017 9:24 am Post subject:
A 4015 based X Y matrix combo idea ... |
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I came up with this unnamed idea, shortly after starting at work yesterday.
Take the CD4015 dual 4 BIT Shift Register.
- Lay the 4 outputs of 1 of them horizontally as A B C D columns across the panel
- Lay the 4 outputs of the other one vertically as 1 2 3 4 rows down the panel
- Row A and Column 1 outputs, will go to a 2 input AND Gate (with an output, at that point)
- Repeat, for each intersection. (16 in total. With 4 Gates per chip, that would require 2 x CD4011's / CD4093's.)
Leaving it JUST like that, the hookup puzzle may not be too bad. (I had thought far farther on the idea at work, than THIS simple solution that I just came up with right now.)
The possibilities? Are phuquing HUGE at what it can do as a multiple Trigger / Gate generator!  
Remember - with the Shift Registers, ANY of their outputs, can be fed back to the Reset input to create a looping point for that shift register. (With further modification, the Data Input could have a pair of inputs that are ANDed, NANDed or XORed.)
The Clock inputs, can of course, be run at any clock divisions. When the Clock goes HIGH, the Data input is scanned for the current LOW or HIGH BIT.
This could even be used with AUDIO inputs to the Data inputs OR clocks.
The possibilities from this thing are mind bending. This could be used in a normal Eurorack setup as well! I'll have to draw a pic to give a visual idea of it.
BUT ... with this so far being a 'vapor-ware' idea, I'm just going to leave it for now. Hopefully returning officially to Lunetta building this weekend for the first time really since 2012, I want to start off SIMPLE. Nothing complex, getting back into it. I'll almost guaranteed, be building a simple oscillator to start with. To get the 'excitement' going again.  Will branch out from there.
My hopes for this weekend to at least, get a working version of my old CD4023 Pulse Width Oscillator going again. This time, with a proper control voltage interface for modulating it externally. Shall see where i I get to this weekend.
Finally returning to DIY after more than a 2 year break ... this be excitin'.  |
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PHOBoS
Joined: Jan 14, 2010
Posts: 5881
Location: Moon Base
Audio files: 709
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stolenfat
Joined: Apr 17, 2008
Posts: 476
Location: Sunny Oakland California
Audio files: 1
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| Posted: Thu Jul 20, 2017 10:00 pm Post subject:
Re: A 4015 based X Y matrix combo idea ... |
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| Richarius wrote: |
Hopefully returning officially to Lunetta building this weekend for the first time really since 2012
Finally returning to DIY after more than a 2 year break ... this be excitin'. |
Welcome back! I started up again recently after a few years off and remember your responses to my posts being quite helpful and insightful. I look forward to seeing this idea expanded upon.
PS.. does this mean the logic forums will come back? (I didn't not take advantage enough)
_________________
home made noise and electronic ill-logic |
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Richarius
Joined: Feb 22, 2014
Posts: 81
Location: Kitchener, Ontario, Canada
Audio files: 1
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Richarius
Joined: Feb 22, 2014
Posts: 81
Location: Kitchener, Ontario, Canada
Audio files: 1
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| Posted: Thu Jul 20, 2017 11:48 pm Post subject:
Re: A 4015 based X Y matrix combo idea ... |
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| stolenfat wrote: | | Richarius wrote: |
Hopefully returning officially to Lunetta building this weekend for the first time really since 2012
Finally returning to DIY after more than a 2 year break ... this be excitin'. |
Welcome back! I started up again recently after a few years off and remember your responses to my posts being quite helpful and insightful. I look forward to seeing this idea expanded upon.
PS.. does this mean the logic forums will come back? (I didn't not take advantage enough) |
Again, hey Stolenfat! Long time!
I was still doing steady building until Summer 2014 when the urge to compose took a strong hold and that has basically gone steady until a few weeks ago, just before a week vacation.
This past weekend, finding some of my old Youtube videos that I had long ago removed, I started posting them again for others to reminisce about or something (  ) and at least 2 of them, were covering the 12th Lunetta machine of mine that I had built in the Summer of 2012.
Seeing THEM, triggered my desire to build The Deathlehem Lunetta Machine #13 and I can't wait to begin later today.
So yeah ... I guess we need a 'break' from doing it for a while, to tend to other things?
I'm glad that I was able to help you on here at least a little bit a ways back. I'm self-taught (and with help from many, MANY others since 1991 online) - lacking a fair bit of theory. But ... every now and then, I manage to build SOMEthing that works.
As to the old Forum that I had tried 3 or 4 times to restore from backup (up to last year's final, failed attempt) - in my resurrecting two old PCs this past weekend, as well as finding another 15 or so videos that I thought were gone forever, I ALSO found a fair # of backups FROM my original forum!
I set up a new Forum at my url for it, and attempted to restore that backups 3 separate times. Nope.
BUT ... each of the 3 reported back "Successful." That had ever occurred on my previous 3 or 4 attempts over the years.
So now - I'm going to head off to the Internet Archive where there ARE some clippings OF that original Forum. I figure that IF I can at least find the 'format' of that Forum, I'll try recreating IT in the backup attempt, and see if any of the old messages appear in their proper areas.
Until then, there is also:
www.deathlehem.ca/modular
which is my NEW reattempt at "The Deathlehem Machine" as per the original name of my old forum that was dedicated to Lunetta stuff.
There's a very small Lunetta section IN it with mostly messages from myself - posting things that I've still had archived on various hard drives as well as some new ideas / etc. (As well as other sections for various things related to the 4U and Euro format for modulars, and other bits and bobs.)
Until I can hopefully get the original forum of mine restored - there IS that one above. There were only 3 active members until a few minutes ago, when I activated the 4th member - RingMad.
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https://tsol.space/crafting/composing-music/albums/ - my punk, ambient and experimental tunes |
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piedwagtail
Joined: Apr 15, 2006
Posts: 297
Location: shoreditch
Audio files: 3
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| Posted: Tue Jul 25, 2017 6:53 am Post subject:
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CD4015BM is pleasingly in SOIC.
4081's I've got in SOIC.
MMBT3904....
1206 10ks
16 banana, 6 banana > 4015
....sorry a screenshot of my thoughts!
Robert |
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