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brother303
Joined: Nov 02, 2010 Posts: 139 Location: ruhr-area/germany
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Posted: Tue Nov 02, 2010 2:43 am Post subject:
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Hi Fonik,
hey,first post...
I´m a few wires away from finishing my sequencer,but there is one question.
In your building instructions there are 2 cv-outs. One on W1 (processed cv-out) and one on the gate/trigger/cv-jumper.
What`s the difference between those two outs? Is the processed-cv out on W1 only an optional thing?
Thanks for this cool project and best regards
Greg |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Tue Nov 02, 2010 2:57 am Post subject:
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brother303 wrote: | Hi Fonik,
hey,first post...
I´m a few wires away from finishing my sequencer,but there is one question.
In your building instructions there are 2 cv-outs. One on W1 (processed cv-out) and one on the gate/trigger/cv-jumper.
What`s the difference between those two outs? Is the processed-cv out on W1 only an optional thing?
Thanks for this cool project and best regards
Greg |
hi greg,
the CV on th the W1 pad is optional. it is just the output of the CV processor in front of the ADC.
it might be that you don't use the sequencer, or you use it without the ADC, but with the switches only. then you could still use the CV conditioner/processor for other tasks independently (attenuation, adding offset) from W1.
hope that helps. _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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brother303
Joined: Nov 02, 2010 Posts: 139 Location: ruhr-area/germany
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Posted: Tue Nov 02, 2010 3:21 am Post subject:
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Hi,
fonik wrote: | hope that helps. |
Yes,it did!
Thanks for support.
Regards
Greg
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LektroiD
Joined: Aug 23, 2008 Posts: 1019 Location: Scottish Borders
Audio files: 2
G2 patch files: 2
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Posted: Wed Nov 17, 2010 11:53 am Post subject:
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Hi, what type of caps are recommended for the 100nF? Obviously I'd rather go through my ceramics before eating into my collection of audio grade caps _________________ LektroiD |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Wed Nov 17, 2010 1:09 pm Post subject:
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i always use just ceramic for these decoupling caps. _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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LektroiD
Joined: Aug 23, 2008 Posts: 1019 Location: Scottish Borders
Audio files: 2
G2 patch files: 2
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Posted: Wed Nov 17, 2010 2:07 pm Post subject:
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fonik wrote: | i always use just ceramic for these decoupling caps. |
are all 21 decoupling caps, or should certain ones be higher grade? _________________ LektroiD |
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Skrog Productions
Joined: Jan 07, 2009 Posts: 1196 Location: Scottish Borders
Audio files: 155
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Posted: Wed Nov 17, 2010 5:18 pm Post subject:
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To the left hand side of the 2 circuit diagrams on the documentation of the vcps-8 , there are some layouts of caps only with i/c numbers & relevant power rail , these caps denote decoupling & power clean up duties, all the caps you see there are fine with ceramic multi-layer or yv5 rough tollerance caps & where showen electrolytics , caps of the same value that are showen in the actual device circuit diagram should been better tollerance like polyester / mylar / etc.
What i do is , mark off with a flourescent marker pen those clean up caps as i put them in first , once the decouple's are all done the remainder of that value (if any) would be polyester box caps. |
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oldmanfury
Joined: Oct 20, 2006 Posts: 57 Location: CA
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Mon Dec 06, 2010 12:22 am Post subject:
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amazing build and application, man! _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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Adam-V
Joined: Jan 29, 2007 Posts: 300 Location: Australia
Audio files: 1
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Posted: Mon Dec 06, 2010 4:02 pm Post subject:
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Are boards for this still available Matthias?
Cheers,
Adam-V _________________ Digitalis Effect | Fractured Symmetry (www.spiralsect.com) |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Mon Dec 06, 2010 4:11 pm Post subject:
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there are still a very few PCBs left... _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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Adam-V
Joined: Jan 29, 2007 Posts: 300 Location: Australia
Audio files: 1
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Posted: Mon Dec 06, 2010 4:18 pm Post subject:
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Brilliant, I'll take 2 please.
I'll continue this via PM.
Cheers,
Adam-V. _________________ Digitalis Effect | Fractured Symmetry (www.spiralsect.com) |
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Rvlt
Joined: Mar 05, 2008 Posts: 33 Location: Berlin
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Posted: Mon Dec 20, 2010 7:57 pm Post subject:
Subject description: another batch? spare pcb? |
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hi everyone,
it seems that all pcbs are sold by now , so if there will be another batch in the near future i would take one (or two)
OR
(just in case): if anyone has a spare pcb to sell, please pm me. i would definitely buy it.
ok, best regards,
lars |
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TekniK
Joined: Aug 10, 2008 Posts: 1059
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djg
Joined: Nov 10, 2010 Posts: 12 Location: New York
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Posted: Tue Jan 11, 2011 12:02 pm Post subject:
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To clear up some confusion, when using an LM324 for the buffers, if the RA resistors are changed to 10K, would any change be needed for the RB values? |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Wed Jan 12, 2011 12:09 am Post subject:
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djg wrote: | To clear up some confusion, when using an LM324 for the buffers, if the RA resistors are changed to 10K, would any change be needed for the RB values? |
no. the changed ratio of RA/RB sets the gain.
according BOM the RA resistors are 20k, the RB resistors are 10k. this would give you a gain of 1+(20/10)=3. since the ADC delivers 5V you will have a range of 15max. however, a TL074 wii not go that high. it will stop at 12.5V when powered by 15V. using a LM324 would help then, due to the fact that this opamp swings almost to the rails.
so if you use 10k for the RA resistors a TL074 is sufficient.
for a range of 5V you would simply leave off the RB resistors and use a bridge for the RA resistors...
in other words: decide wich output range you prefer (i set mine as high as possible and use an attenuator at the output instead), and then choose the opamp. _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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arnoid
Joined: Aug 23, 2009 Posts: 57 Location: Belgium
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Thu Jan 27, 2011 3:48 am Post subject:
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two fellows have had some issues when using certain PSUs. the ADC won't start conversion sometimes, when powering up the module.
here is a little "ignition system"-circuit, that should help. it is a automatic start switch for the ADC, and seems to work fine (however, i had no opportunity to test it with my units, since they start and run quite fine).
explanation: the rising edge from the 5V rail when powering up the module is converted to a short pulse. the pulse controls a transistor to momentarily short pins 3 & 5 of the ADC to GND.
i will incorporate this info in the documentation soon. _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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patchdub
Joined: Jan 21, 2009 Posts: 56 Location: Taos, NM
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Posted: Sat Jan 29, 2011 2:10 am Post subject:
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hi folks! i'm about to make a mouse order but i can't find the 7805 or 100uf. anybody know the numbers for these? that would be much appreciated!
thanks! _________________ www.patchdub.com |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Sat Jan 29, 2011 7:19 am Post subject:
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patchdub wrote: | hi folks! i'm about to make a mouse order but i can't find the 7805 or 100uf. anybody know the numbers for these? that would be much appreciated!
thanks! |
512-LM7805CT
647-UVR1J101MPD1TD _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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patchdub
Joined: Jan 21, 2009 Posts: 56 Location: Taos, NM
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Posted: Sat Jan 29, 2011 11:37 am Post subject:
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thanks matthias!
the 512-LM7805CT is on backorder will the LM78L05ACZXA work? _________________ www.patchdub.com |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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patchdub
Joined: Jan 21, 2009 Posts: 56 Location: Taos, NM
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Posted: Sat Jan 29, 2011 2:46 pm Post subject:
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thanks! excellent build! _________________ www.patchdub.com |
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emdot_ambient
Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD
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patchdub
Joined: Jan 21, 2009 Posts: 56 Location: Taos, NM
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Posted: Sun Mar 27, 2011 9:13 am Post subject:
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emdot_ambient wrote: | Nowhere close to actually completing the build on this, but I think I've finalized my design.
2U high 19" wide panel, includes the Barton Music Circuits Simple Quantizer.
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that will look sweet next to your m-185 panel! _________________ www.patchdub.com |
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