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 Forum index » DIY Hardware and Software » fonik's place
8-Step Sequencer with voltage controllable pattern (VCPS)
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TekniK



Joined: Aug 10, 2008
Posts: 1062

PostPosted: Wed Jan 06, 2010 3:25 am    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
TekniK wrote:
awesome look! Shocked

will u offer pcb's for this matt?


no problem if there is enough interest. we will see when i posted some samples/vids....


great!,can't wait for the vid and a pcb shot! Very Happy

am already gonna start to design a frontpanel Laughing
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whomper



Joined: Dec 15, 2007
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PostPosted: Wed Jan 06, 2010 11:50 am    Post subject: Reply with quote  Mark this post and the followings unread

I am looking to add two to my collection...
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fonik



Joined: Jun 07, 2006
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PostPosted: Wed Jan 06, 2010 12:26 pm    Post subject: Reply with quote  Mark this post and the followings unread

here is a 1st sample. i think it is somehow hard to follow, since there is no time reference like a drum pattern. anyways, the baby10 is controlling the VCP Sequencers pattern: first the baby10 is set to one step, then to two steps, then to 4 steps and finally to 8 steps.
remember, using a 8step sequencer for controlling the VCP Sequencer will give you 8x8=64 steps. another thing i will try is to feed the controlling baby8 with the VCP Sequencers gate or trigger output. manually setting at least one step of the VCPS to ON will prevent it to stop by accident.

Baby8VCP 01 by fonitronik

http://soundcloud.com/fonitronik/baby8vcp-01/download

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cheers,
matthias
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glacial23



Joined: Apr 30, 2008
Posts: 32
Location: Cleveland, OH

PostPosted: Wed Jan 06, 2010 1:20 pm    Post subject: Reply with quote  Mark this post and the followings unread

I think I'm going to want a couple of these.
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TekniK



Joined: Aug 10, 2008
Posts: 1062

PostPosted: Wed Jan 06, 2010 1:33 pm    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
here is a 1st sample.


The sound u have here matt on this demo is very beautifull,very pleasing.

could there be a 2044 in the chain maybe ?

as for the sequencer ,i will buy more as a couple... ... .. .. .. .. .. .. .. ..
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fonik



Joined: Jun 07, 2006
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PostPosted: Wed Jan 06, 2010 2:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

TekniK wrote:
fonik wrote:
here is a 1st sample.


The sound u have here matt on this demo is very beautifull,very pleasing.

could there be a 2044 in the chain maybe ?

thank you, man. 2044? nope. it is the LPG in lopass mode, resonance 50%. the sequencers trigger and gate outputs are controlling the freq.

the patch goes like this:
Audio: EFM Dual VCO3D into LPG292c into fonitronik digiFX.
Clock: CGS Utility LFO a) into Baby8VCP, b) into fonitronik divider into baby10
CV: Baby8VCP into VCO 3D, Trigger & gate into LPG292c

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cheers,
matthias
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Funky40



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PostPosted: Wed Jan 06, 2010 2:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'm interested.
but gladly wait till next winter. Laughing
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fonik



Joined: Jun 07, 2006
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PostPosted: Wed Jan 06, 2010 3:33 pm    Post subject: Reply with quote  Mark this post and the followings unread

bad quality as always. nevertheless:


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Junk Rhythm



Joined: Jan 07, 2008
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PostPosted: Wed Jan 06, 2010 8:20 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'll take a PCB as well.
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RF



Joined: Mar 23, 2007
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PostPosted: Wed Jan 06, 2010 8:34 pm    Post subject: Reply with quote  Mark this post and the followings unread

Great stuff Matthias!
I'd go for a couple of these...

bruce

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scriptstyle



Joined: Jan 22, 2008
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Location: nj

PostPosted: Wed Jan 06, 2010 10:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

awesome! i want one Very Happy
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adambee7



Joined: Apr 04, 2009
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PostPosted: Thu Jan 07, 2010 5:40 am    Post subject: Reply with quote  Mark this post and the followings unread

I want two of those. Nice Job man. Very Happy Very Happy
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TekniK



Joined: Aug 10, 2008
Posts: 1062

PostPosted: Thu Jan 07, 2010 6:31 am    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
bad quality as always. nevertheless:



while watching the vid i got myself an erection.
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tommi



Joined: Dec 05, 2007
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PostPosted: Thu Jan 07, 2010 6:38 am    Post subject: Reply with quote  Mark this post and the followings unread

Now i got how it works...
Please count me in for one or two pcb!
Very Happy

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fonik



Joined: Jun 07, 2006
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PostPosted: Thu Jan 07, 2010 7:04 am    Post subject: Reply with quote  Mark this post and the followings unread

thank you all for all your kind comments and your interest.

i will ask for interest in a PCB in a seperate thread when time has come. i hope you're all fine with that.

however, while testing this module i recognized a somehow strange behaviour:
as soon as you set one or more steps manually to OFF the level of the CV output drops slightly. i can't think of the cause for now, since opamp buffers deliver the current.
i am open for comments or ideas about this.

again, here is the link to the current schematic:
http://www.modular.fonik.de/pdf/VCP8SSeq.pdf

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cheers,
matthias
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tommi



Joined: Dec 05, 2007
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PostPosted: Thu Jan 07, 2010 7:26 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
however, while testing this module i recognized a somehow strange behaviour:
as soon as you set one or more steps manually to OFF the level of the CV output drops slightly. i can't think of the cause for now, since opamp buffers deliver the current.


Watching the video this problem seems inaudible...

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fonik



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PostPosted: Thu Jan 07, 2010 7:45 am    Post subject: Reply with quote  Mark this post and the followings unread

tommi wrote:
Quote:
however, while testing this module i recognized a somehow strange behaviour:
as soon as you set one or more steps manually to OFF the level of the CV output drops slightly. i can't think of the cause for now, since opamp buffers deliver the current.


Watching the video this problem seems inaudible...

may be due to the quantizer i am using and due to the fact that the clock is running fast?

anyways, any comment converning the possible cause of this voltagedrop is appreciated. it only applies to manual switching OFF.


BTW tommi, check PM!

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KEYKEYEYEKIT



Joined: Sep 08, 2009
Posts: 24
Location: Atlanta

PostPosted: Thu Jan 07, 2010 7:45 pm    Post subject: wow! Reply with quote  Mark this post and the followings unread

I know you said different thread... but I just wanted to throw up my hand for two of these.
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diablojoy



Joined: Sep 07, 2008
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PostPosted: Thu Jan 07, 2010 9:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

not too sure but perhaps because your opamp buffer inputs are floating when in off position , you may need to tie the input to earth when off is selected,
will require a dpdt center off for each
worth a try anyways Wink
and i was wrong in the pm. I will want 4 i think. Laughing
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fonik



Joined: Jun 07, 2006
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PostPosted: Sun Jan 10, 2010 7:59 am    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
however, while testing this module i recognized a somehow strange behaviour:
as soon as you set one or more steps manually to OFF the level of the CV output drops slightly.

problem solved!

i will start working on a DIY friendly PCB next week.

current proto PCB:
Posted Image, might have been reduced in size. Click Image to view fullscreen.

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Funky40



Joined: Sep 24, 2005
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PostPosted: Sun Jan 10, 2010 8:37 am    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:


i will start working on a DIY friendly PCB next week.

can you please add two resistors to get 3 CV inputs.
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fonik



Joined: Jun 07, 2006
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PostPosted: Wed Jan 13, 2010 5:29 am    Post subject: Reply with quote  Mark this post and the followings unread

Funky40 wrote:
fonik wrote:


i will start working on a DIY friendly PCB next week.

can you please add two resistors to get 3 CV inputs.


done.

this is how the PCB might look like. double sided, 4.9x3.9 inches in size. it provides standard connectors for most of the controls. however, to minimize the overall size of the board, and to minimize the wires going from board to frontpanel, i decided to not incorporate the GND and +5V to all the control connectors, but to have a wirepad on the board. accordingly the attenuating potentiometers will have to get wired on the panel.

VCPS_layout
[edit: layout updated]

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Last edited by fonik on Thu Jan 14, 2010 6:38 am; edited 3 times in total
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The Bad Producer



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PostPosted: Wed Jan 13, 2010 6:23 am    Post subject: Reply with quote  Mark this post and the followings unread

cool Fonik! I'll surely be getting some of these if you produce a run...

any chance of squeezing on a .156" PSU connector a la Blacet etc?

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fonik



Joined: Jun 07, 2006
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PostPosted: Wed Jan 13, 2010 6:26 am    Post subject: Reply with quote  Mark this post and the followings unread

The Bad Producer wrote:
any chance of squeezing on a .156" PSU connector a la Blacet etc?

gosh! i forgot about those, and the 6pin .100 too!?

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fonik



Joined: Jun 07, 2006
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PostPosted: Thu Jan 14, 2010 6:44 am    Post subject: Reply with quote  Mark this post and the followings unread

okay. i now implemented the MOTM .156 connector, the 16pin doepfer bus IDC connector, and the .com 6pin .100 connector. (see above)

both the doepfer and the .com buss provide a +5V rail. by closing a jumper the board can now use this, instead of the onboard regulator.

i am currently working on another project i need to order a prototype PCB soon. i will order the new VCPS board then too.
i think it will take some time until this project becomes available. i rearranged a lot now and the board will need a complete beta test.

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