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ericcoleridge
Joined: Jan 16, 2007 Posts: 889 Location: NYC
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etaoin
Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL
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ericcoleridge
Joined: Jan 16, 2007 Posts: 889 Location: NYC
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Posted: Wed Nov 21, 2007 12:25 pm Post subject:
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I was hoping to get a free sample from Analog Devices. Their website says that it's an unreleased product.
I don't really understand if this means that the chip was discontinued and is now going to be available again, or if there is going to be a new/different chip released with the same product number (this seems strange)? |
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etaoin
Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL
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Posted: Wed Nov 21, 2007 12:52 pm Post subject:
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It's probably the non-RohS part that has been discontinued and the RoHS compliant part that has still to be released. _________________ http://www.casia.org/modular/ |
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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 Nov 21, 2007 3:02 pm Post subject:
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I will be willing to do it, Iv'e layed out 3 schematics already in eagle, I think I'm competent enough to do this ( find one here http://electro-music.com/forum/topic-21917.html ), VERY interested in a quantizer ( specifically for a sequencer )
I'll need to get a sample of that chip!
which circuit do you think offers the best features? Last edited by Clack on Wed Nov 21, 2007 3:32 pm; edited 1 time in total |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Wed Nov 21, 2007 3:18 pm Post subject:
Re: CV Quantizer PCB Layouts |
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ericcoleridge wrote: | http://www.modularsynthesis.com/modules/DJB-013/DJB-013_schematic3.jpg |
don't know about that one.
Quote: | http://mypeoplepc.com/members/scottnoanh/birthofasynth/id15.html | scotts proven design
Quote: | http://www.mindspring.com/~clist/resource/circuits/cv_quant.html | definetely some errors in the schematic _________________
cheers,
matthias
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Big Boss at fonitronik
Tech Buddy at Random*Source |
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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: Thu Nov 22, 2007 4:22 am Post subject:
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no samples available of it from AD im afraid ... off to farnell! £11! DAC are always very expensive. I started laying scotts one out, probably will split it into different boards as im using eagle light _________________ Clacktronics.co.uk Last edited by Clack on Thu Nov 22, 2007 4:39 am; edited 1 time in total |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Thu Nov 22, 2007 4:28 am Post subject:
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a layout would be great. i did not get the staircase generator working on the breadboard - i blame the cmos, being more straight i should blame myself
so i still got this AD DAC waiting here. _________________
cheers,
matthias
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Big Boss at fonitronik
Tech Buddy at Random*Source |
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etaoin
Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL
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Posted: Thu Nov 22, 2007 4:32 am Post subject:
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Farnell doesn't like to sell to private customers over here. Large minimum order and shipping fees (whereas companies have no minimum order and free shipping!).
So, any other sources? _________________ 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: Thu Nov 22, 2007 4:43 am Post subject:
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i've sadly gave up with this project because of AD (the IC) and AD (the company that doesn't send samples)
so sadly... |
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etaoin
Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL
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Posted: Thu Nov 22, 2007 4:49 am Post subject:
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I gave up on a DIY quantizer for a while when I managed to get a cheap Doepfer A156. But I probably want more quantizers anyway.
I was really looking for the AD/DA that is in the Elektor one, as that does different scales like Doepfer.
Sadly there don't seem to be any DIY PIC-based designs (like the A156). That saves one getting odd AD and DA's. _________________ http://www.casia.org/modular/ |
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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: Thu Nov 22, 2007 4:50 am Post subject:
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I could bulk order some - buying over 10 it goes down to £8 - never bought from farnell before but I think it is available to me>. I need to get a credit card first! ( been meaning to get one for a while now )
RS ( i think it may be uk only ) its £25!!!
I dont know about US distributors but it says digikey does it ( is that business only? ) _________________ Clacktronics.co.uk |
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etaoin
Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL
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Posted: Thu Nov 22, 2007 4:53 am Post subject:
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Quote: | I dont know about US distributors but it says digikey does it ( is that business only? ) |
Digikey sell to everyone, but charge around $50-60 shipping to Europe. _________________ http://www.casia.org/modular/ |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Thu Nov 22, 2007 4:56 am Post subject:
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Mr Clack wrote: | RS ( i think it may be uk only ) its £25!!! |
RS components germany sells them for 27.-EUR (20£) _________________
cheers,
matthias
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Big Boss at fonitronik
Tech Buddy at Random*Source |
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para
Joined: Oct 16, 2006 Posts: 276
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etaoin
Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL
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Posted: Thu Nov 22, 2007 5:41 am Post subject:
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As far as I can tell, none of these actually offer easy or cheap shipping to Europe.
Digikey is expensive, and Allied and Jameco won't quote shipping in the checkout, which usually means they ship the order and then charge you actual UPS or FedEx costs (which will be close to $75), like Mouser does. _________________ http://www.casia.org/modular/ |
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krisp14u
Joined: Nov 11, 2006 Posts: 206 Location: uk
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Posted: Thu Nov 22, 2007 6:13 am Post subject:
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Mr Clack wrote: | I could bulk order some - buying over 10 it goes down to £8 - never bought from farnell before but I think it is available to me>. I need to get a credit card first! ( been meaning to get one for a while now )
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I order Quite alot from Farnell and could do a small group buy
Paul _________________ Cheers
Paul Darlow
www.krisp1.com |
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funkyfarm
Joined: Jan 21, 2007 Posts: 583 Location: France
Audio files: 3
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Posted: Thu Nov 22, 2007 10:20 am Post subject:
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So I guess now it's time for me to say : "+1 for a pcb" |
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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: Thu Nov 22, 2007 10:54 am Post subject:
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I wasn't planning on getting it professionally done, just for someone if they want to do press'n'peel. Wouldn't mind handing it over to someone though.
shamefully farnell only have 7 chips in stock dammit! gonna email them _________________ Clacktronics.co.uk |
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fluxmonkey
Joined: Jun 24, 2005 Posts: 708 Location: cleve
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Posted: Thu Nov 22, 2007 11:01 am Post subject:
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if DIY includes kits, i can recommend the blacet miniwave & hylander Quantizer ROM combo... i have 2 & am very happy w/ em. between expensive ad/da chips, precision resistors, and other related expenses (not least of which is time), you might find this to be a very cost-effective solution, even if you only use it as a quantizer.
b |
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ericcoleridge
Joined: Jan 16, 2007 Posts: 889 Location: NYC
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Posted: Mon Nov 26, 2007 10:03 am Post subject:
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I ordered samples from Analog Devices last year without any problem. Received them express overnight shipping even!
Have they discontinued this service (still listed on website), or is it just a problem with this particuar IC--which seems to be temporarily(?) out of production?
I wonder if there isn't some other, more readily available, DA that could be substituted in this schematic? |
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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 Nov 26, 2007 11:03 am Post subject:
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having trouble staying away from using jumper wires. _________________ Clacktronics.co.uk Last edited by Clack on Mon Nov 26, 2007 1:56 pm; edited 1 time in total |
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mono-poly
Joined: Jul 07, 2004 Posts: 937 Location: Rotterdam, Netherlands
Audio files: 2
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Posted: Mon Nov 26, 2007 11:12 am Post subject:
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I still hope someone one day is gonna release a DIY quantizer.
But imho it should have lots of scales in it accesable by gate/triggers or cv |
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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 Nov 26, 2007 1:52 pm Post subject:
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well finished it, um havn't tested it. Need an AD7245!
posting it to see if anyone wants to try it out/test it, or look through it for errors. the clock is not on this board though as it will be on the channels board! heh
all red are links, J1 is the link between AGND and DGND .
I found this usefull article on DA converters and grounding here
http://www.epanorama.net/wwwboard/messages/16215.html
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_________________ Clacktronics.co.uk Last edited by Clack on Thu Nov 29, 2007 2:13 am; edited 4 times in total |
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bugbrand
Joined: Nov 27, 2005 Posts: 846 Location: Bristol, UK
Audio files: 1
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Posted: Mon Nov 26, 2007 4:26 pm Post subject:
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Hey Ben,
I may be able to spare a 7245 'cos I just checked and found I'd got two as samples sometime last year (yeah, its a shame they seem to have changed their sample methods now - guess that was a golden age of many good free chips!)
- also, I think you've forgotten to connect the pin4 v-s of the 072s to the main V- used on R5.
I'll PM you.. _________________ http://www.bugbrand.co.uk
http://www.bugbrand.blogspot.com |
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