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papaver
Joined: Sep 18, 2009 Posts: 68 Location: Barcelona, Catalunya, Spain
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Posted: Fri May 11, 2012 3:43 am Post subject:
New Step Sequencer |
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Hi !!
I have finished the first prototype of a very simple step sequencer, in the line of a 4017 step sequencer but this time is expandable to 16, 32, 64, infinte steps.
Here is an ugly video that I have recorded yesterday, the first take with the prototype. My intention is to make very easy to build PCBs (in the line of Shruthi synth or others).
here is the video! http://youtu.be/t-ccsr0EJGA
The features of the sequencer are:
- Step sequencer with gate, trigger and CV outputs.
- Very very very easy to build, not programming needed.
- Expandable until the infinite and more!
- Configurable in a minimum of 4 steps (this is the bad part, not possible to reduce to 1, 2 o 3 steps. The minimum are 4 ad multiple).
- More than one sequence at a time! (see the video)
- Very funny and easy to use.
- Reduce the level of stress in a 110% in comparison with computer based sequences.
- Fat free.
Schematics and more info as soon as I can! |
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Uncle Krunkus
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Joined: Jul 11, 2005 Posts: 4761 Location: Sydney, Australia
Audio files: 52
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Posted: Fri May 11, 2012 6:43 am Post subject:
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I haven't got the bandwidth to watch the video, but I look forward to seeing the schems! _________________ What makes a space ours, is what we put there, and what we do there. |
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papaver
Joined: Sep 18, 2009 Posts: 68 Location: Barcelona, Catalunya, Spain
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papaver
Joined: Sep 18, 2009 Posts: 68 Location: Barcelona, Catalunya, Spain
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Uncle Krunkus
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Joined: Jul 11, 2005 Posts: 4761 Location: Sydney, Australia
Audio files: 52
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Posted: Tue May 15, 2012 5:06 am Post subject:
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That's a really cool build papaver! _________________ What makes a space ours, is what we put there, and what we do there. |
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LFLab
Joined: Dec 17, 2009 Posts: 497 Location: Rosmalen, Netherlands
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Posted: Tue May 15, 2012 5:11 am Post subject:
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Nice one, I hadn't seen a sequencer using the 4015 before, but the fact that it is easily expandable is very nice. It would need some buffering, and a schmitt trigger to trigger it is also very helpful since it'll allow you to use small signals to trigger as well. I'd also go with a CMOS 555 (or no clock at all). |
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papaver
Joined: Sep 18, 2009 Posts: 68 Location: Barcelona, Catalunya, Spain
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Posted: Tue May 15, 2012 8:07 am Post subject:
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Thanks for the comments!
Yes, the buffer section is not in the schematic, but it'll be in the final version. It'll be usefull in some circumstances. But for now it works fine with only one destination and short cables.
Don't understand what you mean with the schmitt trigger. I have tried to use a 40106 (6 schmit trgis) for the clock, but Ive noticed some irregularities with the tempo, maye is for the lack of filtering capacitors during the tests or for the lack of the buffers at the outputs, I don't know.
But using a 40106 would be great since with a pair of schmith triggers you can build any logic gate that you want. So you put the clock and the AND gate in one single chip.
Anyway the save in money and space doing this is not significant as the build is very easy.
I will work in the PCB's next week.
I have tested today with the MPS and it really works! |
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richardc64
Joined: Jun 01, 2006 Posts: 679 Location: NYC
Audio files: 26
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Posted: Tue May 15, 2012 12:40 pm Post subject:
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papaver wrote: | The bad part, or the antifeature (like says Ray Wilson) is that you can only run the seq in blocks of 4 steps, not less. |
Or can you?
If the D input of IC1b were connected to QC instead of QD of IC1a. the sequence would be shortened by one step. Connecting to QB would shorten by two steps. The "skipped" steps would occur simultaneously with the first n steps of the following shift register. The resulting voltage outputs would then be additive. (Think: KLEE.) Or, the voltages from the skipped steps could be eliminated by simply turning down the appropriate pots.
With enough switches or patch cords you should be able to get any length from 4 to 16 steps. _________________ Revenge is a dish best served with a fork... to the eye |
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papaver
Joined: Sep 18, 2009 Posts: 68 Location: Barcelona, Catalunya, Spain
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Posted: Tue May 15, 2012 2:55 pm Post subject:
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That's great Richard! You're right. That's a really good idea.
At the beggining I have think about this. Like in a normal sequencer if I connect the step 15 or 14 to the D of Ic1A, but the concept of the simultaneous steps don't like me then so I decided to don't look anymore to this. But your point is really new in perspective. (And a lesson to review my way of thinking )
I don't know the Klee. i have to take a look.
thxs! |
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diablojoy
Joined: Sep 07, 2008 Posts: 809 Location: melbourne australia
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Posted: Tue May 15, 2012 4:18 pm Post subject:
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nice sequencer I like the idea a lot
and that is a good call richard
Quote: | If the D input of IC1b were connected to QC instead of QD of IC1a |
if you made those D inputs switchable to each of the 4 Q outputs could be very interesting indeed especially if 4016 or 4066 switches were used controlled by some extra logic circuitry and/ or physical switches plus a VC in jack added [a comparative setup perhaps ? ]
dont ya just love feature creep
but it would make for an orsm N step sequencer _________________ In an infinite universe one might very well
ask where the hell am I
oh yeah thats right the land of OZ
as good an answer as any |
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papaver
Joined: Sep 18, 2009 Posts: 68 Location: Barcelona, Catalunya, Spain
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Posted: Wed May 16, 2012 2:54 am Post subject:
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the idea of the IC switches is very interesting and it opens a world of possibilities, but it need a lot of experimentation too.
For now I will release the Centipede v1 with the mecanic switches. I will post the schematics soon with the switches and the buffers. I want to keep this one simple.
Anyway, I will develop another sequencer, with more features, based on this one, but I need more time.
First the v1! |
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diablojoy
Joined: Sep 07, 2008 Posts: 809 Location: melbourne australia
Audio files: 11
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Posted: Wed May 16, 2012 3:12 am Post subject:
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Quote: | For now I will release the Centipede v1 with the mecanic switches. I will post the schematics soon with the switches and the buffers. I want to keep this one simple.
Anyway, I will develop another sequencer, with more features, based on this one, but I need more time.
First the v1! |
cool I will look forward to it
and it takes so much time I understand that part all too well
goodluck _________________ In an infinite universe one might very well
ask where the hell am I
oh yeah thats right the land of OZ
as good an answer as any |
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papaver
Joined: Sep 18, 2009 Posts: 68 Location: Barcelona, Catalunya, Spain
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KRS1972
Joined: Sep 27, 2012 Posts: 38 Location: Amsterdam
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papaver
Joined: Sep 18, 2009 Posts: 68 Location: Barcelona, Catalunya, Spain
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Posted: Thu Oct 04, 2012 10:06 am Post subject:
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Hi!
Yes this is very clos to the centipede. Is a very simple build but it can be the center of something more complex.
I've developed the PCB but for now I have stopped the project for a while. I have to much work here now and no time. As soon as I can I will share everything and work on a v.2 with some cool options (still in my mind ). |
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