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xiphocoleon
Joined: Oct 04, 2013 Posts: 40 Location: Brooklyn
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creekree
Joined: Mar 30, 2006 Posts: 192 Location: Morgenland Neukölln
Audio files: 1
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Posted: Sun Nov 30, 2014 6:45 am Post subject:
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nice!
two questions:
what is the "CLCK1 HOLD" Jack for?
what does the AR Switch do? I assume you get attack and release control for each gate, is that correct?
also, could you post the eagle files please?
thank you! _________________
sneakthief wrote: | Your square wave isn't loud enough. |
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xiphocoleon
Joined: Oct 04, 2013 Posts: 40 Location: Brooklyn
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Posted: Sun Nov 30, 2014 7:27 am Post subject:
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Hi creekree --
The CLCK1 Hold will stop the first 4017 from counting when a high (or maybe low, I'd have to check) signal is present here.
The AR switch, when on, will activate the attack and release pots, so that break the rigid pulse shape of the outputs.
My Eagle files are on my other computer, but I will post them soon.
--
As some notes to this design, now that I've been using it in my modular for a little bit:
-I would like to adjust the sensitivity for clock inputs so waveshapes as low as 5Vpp could trigger the clock. I would have to scope this out, but I think the clock input wave, has to be at least 10Vpp to trigger the clock |
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roglok
Joined: Aug 28, 2010 Posts: 202 Location: uptown
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Posted: Mon Dec 01, 2014 10:04 am Post subject:
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xiphocoleon wrote: |
-I would like to adjust the sensitivity for clock inputs so waveshapes as low as 5Vpp could trigger the clock. I would have to scope this out, but I think the clock input wave, has to be at least 10Vpp to trigger the clock |
you can easily change the clock threshold by adjusting the voltage divider (R3/R4) in the LM324 comparator. |
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PHOBoS
Joined: Jan 14, 2010 Posts: 5591 Location: Moon Base
Audio files: 705
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Snaper
Joined: Feb 28, 2014 Posts: 217 Location: Hungary
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Posted: Tue Dec 02, 2014 5:29 am Post subject:
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xiphocoleon wrote: | Hi creekree --
The CLCK1 Hold will stop the first 4017 from counting when a high (or maybe low, I'd have to check) signal is present here.
The AR switch, when on, will activate the attack and release pots, so that break the rigid pulse shape of the outputs.
My Eagle files are on my other computer, but I will post them soon.
--
As some notes to this design, now that I've been using it in my modular for a little bit:
-I would like to adjust the sensitivity for clock inputs so waveshapes as low as 5Vpp could trigger the clock. I would have to scope this out, but I think the clock input wave, has to be at least 10Vpp to trigger the clock |
Intersted too |
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xiphocoleon
Joined: Oct 04, 2013 Posts: 40 Location: Brooklyn
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Snaper
Joined: Feb 28, 2014 Posts: 217 Location: Hungary
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Posted: Wed Dec 10, 2014 12:25 am Post subject:
Re: Attached Eagle File |
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xiphocoleon wrote: | Hi all -- the Eagle file for the 2x4017 sequencer is attached here. Let me know if you can't open it. |
'Got a question, regarding your note at the bottom.
Is this problem fixed in the schemo?
Im planning to create a single sisded PCB art for home etching. |
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PHOBoS
Joined: Jan 14, 2010 Posts: 5591 Location: Moon Base
Audio files: 705
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Posted: Wed Dec 10, 2014 6:05 am Post subject:
Re: Attached Eagle File |
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Snaper wrote: | xiphocoleon wrote: | Hi all -- the Eagle file for the 2x4017 sequencer is attached here. Let me know if you can't open it. |
'Got a question, regarding your note at the bottom.
Is this problem fixed in the schemo?
Im planning to create a single sisded PCB art for home etching. |
Not sure if I remember correctly but when xiphocoleon mentioned the skipping of step 1 we both looked for a solution.
I came up with reducing R11 from 100K to 10K, while xiphocoleon came up with adding R29.
So yes it should be fixed. (although I haven't tested the full circuit in this form myself) _________________ "My perf, it's full of holes!"
http://phobos.000space.com/
SoundCloud BandCamp MixCloud Stickney Synthyards Captain Collider Twitch YouTube |
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Snaper
Joined: Feb 28, 2014 Posts: 217 Location: Hungary
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Posted: Wed Dec 10, 2014 6:21 am Post subject:
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Thanks!
In the other hands, it seems a very big work to shrink it into a single sided pcb with gooood size.
Will work on it, then will post the board layout |
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xiphocoleon
Joined: Oct 04, 2013 Posts: 40 Location: Brooklyn
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Posted: Wed Dec 10, 2014 6:48 am Post subject:
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The schematic as posted works for the parts on my bench
That being said, I'd highly recommend prototyping it out and see if you encounter any glitches. The two resistors in the note on the schematic helped my system function and in using a hand-soldered version of this sequencer for a couple months now, I haven't noticed any irregularities in its operation.
Glad to hear you're going to build it. Would love to hear about the results.
Thomas |
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Snaper
Joined: Feb 28, 2014 Posts: 217 Location: Hungary
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Posted: Thu Dec 11, 2014 2:37 am Post subject:
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xiphocoleon wrote: | The schematic as posted works for the parts on my bench
That being said, I'd highly recommend prototyping it out and see if you encounter any glitches. The two resistors in the note on the schematic helped my system function and in using a hand-soldered version of this sequencer for a couple months now, I haven't noticed any irregularities in its operation.
Glad to hear you're going to build it. Would love to hear about the results.
Thomas |
Ah...it seems that Im not a well talented eagle ninja, I can't squeeze it to a sinlge sided board for home etching :S |
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