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ericcoleridge
Joined: Jan 16, 2007 Posts: 889 Location: NYC
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Posted: Mon Nov 26, 2007 4:32 pm Post subject:
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Wow! That's awesome. I will test out your design if you decide to layout the other parts of the schem.
But I really need to learn how to do this--how to lay out schems for PCB fab.
Theres another circuit that I've been wanting very much to try out, but one i think is too complicated for me to veroboard; a frequency to pitch converter designed by Moog Music for their theremin--buT probably useful to for all instruments: http://www.moogmusic.com/manuals/HotRodEtherwav.pdf |
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Clack
Joined: Aug 08, 2005 Posts: 438 Location: Walthamstow - london
Audio files: 5
G2 patch files: 1
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Posted: Tue Nov 27, 2007 11:33 am Post subject:
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bugbrand wrote: | I think you've forgotten to connect the pin4 v-s of the 072s to the main V- used on R5. |
Thanks for that, on the schematic I drew beforehand it was on a different pole for some reason!!
Updated the post, it should now be more correct _________________ Clacktronics.co.uk |
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funkyfarm
Joined: Jan 21, 2007 Posts: 583 Location: France
Audio files: 3
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Posted: Fri Dec 21, 2007 1:30 pm Post subject:
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Hi Mr Clack,
did you have any successful test with an AD chip fitted in ? |
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Clack
Joined: Aug 08, 2005 Posts: 438 Location: Walthamstow - london
Audio files: 5
G2 patch files: 1
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Posted: Fri Dec 21, 2007 1:55 pm Post subject:
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afraid not, havnt received my credit card yet , nor have I got round to the chanels section of the schematic ( which shouldnt take long to do .) After the christmas break I will have a more free time to do layouts - so should be made in jan _________________ Clacktronics.co.uk |
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loss1234
Joined: Jul 24, 2007 Posts: 1536 Location: nyc
Audio files: 41
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Sat Feb 09, 2008 4:13 pm Post subject:
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loss1234 wrote: | -WHAT sort of chip does the doepfer or blacet use?? |
the doepfer quantizer is PIC based. _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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loss1234
Joined: Jul 24, 2007 Posts: 1536 Location: nyc
Audio files: 41
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loss1234
Joined: Jul 24, 2007 Posts: 1536 Location: nyc
Audio files: 41
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Clack
Joined: Aug 08, 2005 Posts: 438 Location: Walthamstow - london
Audio files: 5
G2 patch files: 1
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Posted: Mon Feb 11, 2008 7:23 am Post subject:
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Nope , since I posted that I found a Lot of errors especially as I assumed the package was 0.6in wide rather than 0.3! ( although can you get it in both? )
I want to get this one really right so it may be a little while - im doing a little bit every day. I have decided since to make it 2 layer - but with via's so that you can still do one layer but with wires running over the board - only with a few power connections not the signal. This is mostly to keep things clean under the IC's. I have started the channels board - it should be that they are the same size and you can bolt them together. Im doing 2 boards because of the board size limit in eagle light - you could just etch them together
yes if you tried it out it would be useful - I have everything except the DAC , ill post the stairstep part up when I get home its finished _________________ Clacktronics.co.uk |
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funkyfarm
Joined: Jan 21, 2007 Posts: 583 Location: France
Audio files: 3
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Posted: Mon Mar 31, 2008 12:54 am Post subject:
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I would definitley need one of these.
will seek for some AD7245... |
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loss1234
Joined: Jul 24, 2007 Posts: 1536 Location: nyc
Audio files: 41
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funkyfarm
Joined: Jan 21, 2007 Posts: 583 Location: France
Audio files: 3
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Posted: Mon Mar 31, 2008 5:09 am Post subject:
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loss1234 wrote: | i got my chip |
and you got mine ?
I guess farnell has some (if anybody interested, maybe i could...) |
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neandrewthal
Joined: May 11, 2007 Posts: 672 Location: Canada
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Posted: Tue Apr 01, 2008 1:13 am Post subject:
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I'd be in for 2-4 of these if someone made a PCB. _________________ " I went through quite a few trannies til I found one I liked" - Wild Zebra |
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funkyfarm
Joined: Jan 21, 2007 Posts: 583 Location: France
Audio files: 3
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Posted: Tue Apr 01, 2008 7:58 pm Post subject:
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farnell : 13,90 € / 21.69$ |
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Clack
Joined: Aug 08, 2005 Posts: 438 Location: Walthamstow - london
Audio files: 5
G2 patch files: 1
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Posted: Wed Apr 02, 2008 1:11 am Post subject:
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Hi,
yeah ive redrawn it a few times, been slack on it though sorry
ill get onto it _________________ Clacktronics.co.uk |
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neandrewthal
Joined: May 11, 2007 Posts: 672 Location: Canada
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Posted: Tue Jun 03, 2008 12:30 am Post subject:
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Is anyone still interested in this now that the quantix-8 is around? I, for one have no use for a wavetable oscillator, but I need a bunch of bare-bones quantizers. _________________ " I went through quite a few trannies til I found one I liked" - Wild Zebra |
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loss1234
Joined: Jul 24, 2007 Posts: 1536 Location: nyc
Audio files: 41
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ericcoleridge
Joined: Jan 16, 2007 Posts: 889 Location: NYC
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Posted: Tue Jun 03, 2008 9:47 am Post subject:
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I'm with you guys. I really don't want to build such a complicated circuit, when I basically just want the quantizer. Also, I'd like a few of them. One or two for my sequencer, one for my wogglebug, etc.
However, I've recently discovered an option that I didn't previously know of. There is a quantizer built into the Blacet "Improbability Drive" module. The kit is $150 (which is still high, but much better that buying a doepfer quantizer for $250, and then putting it behind a new panel).
The quantizer on the Blacet has a switch for chromatic, major, minor and diminished. Plus the rest of the Improbability Drive looks pretty cool and useful. Similar to the Wogglebug or Buchla Source of Uncertainty. I'm leaning in this direction. |
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guitarfool
Joined: Feb 26, 2007 Posts: 160 Location: Maryland
Audio files: 8
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Posted: Tue Jun 03, 2008 7:19 pm Post subject:
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ericcoleridge wrote: | However, I've recently discovered an option that I didn't previously know of. There is a quantizer built into the Blacet "Improbability Drive" module. The kit is $150 (which is still high, but much better that buying a doepfer quantizer for $250, and then putting it behind a new panel).
The quantizer on the Blacet has a switch for chromatic, major, minor and diminished. Plus the rest of the Improbability Drive looks pretty cool and useful. Similar to the Wogglebug or Buchla Source of Uncertainty. I'm leaning in this direction. |
I have one. It works pretty good, but the scale is selected by a trimmer on the board. I plan on having this done from the panel.
He used a PIC, DAC0800 and a couple of op amps for it - pretty simple actually. You could petition John Blacet to produce a board with just his quantizer on it. Or at least the programmed PIC with a schematic. If there was enough interest, he might do it. |
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neandrewthal
Joined: May 11, 2007 Posts: 672 Location: Canada
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Posted: Tue Jun 03, 2008 7:30 pm Post subject:
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ericcoleridge wrote: | I'm with you guys. I really don't want to build such a complicated circuit, when I basically just want the quantizer. Also, I'd like a few of them. One or two for my sequencer, one for my wogglebug, etc.
However, I've recently discovered an option that I didn't previously know of. There is a quantizer built into the Blacet "Improbability Drive" module. The kit is $150 (which is still high, but much better that buying a doepfer quantizer for $250, and then putting it behind a new panel).
The quantizer on the Blacet has a switch for chromatic, major, minor and diminished. Plus the rest of the Improbability Drive looks pretty cool and useful. Similar to the Wogglebug or Buchla Source of Uncertainty. I'm leaning in this direction. |
I've actually considered both of these and I was leaning towards the doepfer because it is a dual quantizer. _________________ " I went through quite a few trannies til I found one I liked" - Wild Zebra |
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funkyfarm
Joined: Jan 21, 2007 Posts: 583 Location: France
Audio files: 3
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Posted: Wed Jun 04, 2008 12:44 am Post subject:
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I'll breadboard the DAC part as soon as Farnell has this expensive ic in stock... |
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etaoin
Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL
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Posted: Wed Jun 04, 2008 12:56 am Post subject:
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I might still be interested. I already have the Doepfer one (far cheaper over here!) and have ordered the Quantix board. But I might well use the Quantix board as an 8-bit sampler most of the time.
Having played with the Doepfer, I'd say I prefer one with scales. The Doepfer quantizer has one chromatic quantizer and one scaled one and I hardly ever use the chromatic one.
I'l still hoping to find the ADC/DAC used in the Elektor one so I can build that as well. _________________ http://www.casia.org/modular/ |
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funkyfarm
Joined: Jan 21, 2007 Posts: 583 Location: France
Audio files: 3
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Posted: Wed Jun 04, 2008 1:58 am Post subject:
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Etaoin wrote: | Having played with the Doepfer, I'd say I prefer one with scales. |
i guess it's aimed for a totally different use.
this can't compete with, be compared with Quantix 8/other scale quantizers.
A scale quantizer allows to create melodies, arpeggios from any cv source.
This AD7245 module is just a "utility module" that steps your cv into well-tempred scale intervals. (to square S&H, sequencer cv output...)
Etaoin wrote: | Having played with the Doepfer, I'd say I prefer one with scales. |
THIS IS 10 VOLTS BI POLAR !!!
(no need to attenuate, scale, etc all your cv signals before feeding it...a great value)
PS : btw, you write "quantizer" or "quantiser" ?
Google search : quantizer : 381 000 results
Google search : quantiser : 22 800 results |
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etaoin
Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL
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Posted: Wed Jun 04, 2008 2:24 am Post subject:
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funkyfarm wrote: | This AD7245 module is just a "utility module" that step your cv into well-tempred scale intervals. (to square S&H, sequencer cv output...) |
Yes, but with current availability and prices of the AD7245, it's very expensive as a utility module. Digikey is something like $50-60 shipping to Europe. Farnell has a minimum order of 50 euro and a 25 euro acquisition fee as they don't have it in stock.
So I'm very interested, but only if the availability of the AD7245 gets better. Being in Europe, a Quantix is actually cheaper at the moment! _________________ http://www.casia.org/modular/ |
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funkyfarm
Joined: Jan 21, 2007 Posts: 583 Location: France
Audio files: 3
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Posted: Wed Jun 04, 2008 2:46 am Post subject:
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Etaoin wrote: | Yes, but with current availability and prices of the AD7245, it's very expensive as a utility module. Digikey is something like $50-60 shipping to Europe. Farnell has a minimum order of 50 euro and a 25 euro acquisition fee as they don't have it in stock.
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arghh...
i've understood farnell waits for some ic to be stocked...
so, (i guess) with no additionnal charge.
i remember about free shipping for over 200€ order...
i've sent them a mail.
Quantix-8 is for me an amazing project, i'd never try to breadboard (any part of) it... |
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