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*          SDS Labs Digital To Analog Converters           *
*          File Description and Shareware Policy           *
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I have just finished my latest DAC designs for a Positive 
Feedback article.  I thought that I would share them with you 
all.  I'm trying an experiment.  I've put the parts lists, 
schematics and layouts for my latest DAC designs on this 
anonymous FTP site (sun.soe.clarkson.edu if you got this from 
a friend).  I'm making my designs "shareware".  Here are the 
following terms and conditions:

If you like my designs and use them to build a DAC of your 
own, please send me 15.00$ or whatever you feel they are 
worth.  I would gladly accept "goods" instead of cash.  If 
you send me some cash (or some goods of similar value, i.e. a 
CD, or some electrical parts) I'll help you with any 
questions you have.  If you're poor like me, and can't afford 
money or goods, then send me something you've worked on.  I'm 
not picky, and I don't expect to hear from everybody.

If you check these DACs out and think I can't design a DAC to 
save my life.  Don't send me any cash, instead, let me know 
what I'm doing wrong.  If you modify my design tell me what 
you changed and why.  If you give me good ideas, maybe I'll 
send YOU some cash.  

If you just look over my designs to learn about DACs, or to 
see what I'm doing, don't send me any cash.  I'm more than 
happy to let people know what I'm doing, that's why I 
published them.  Audio should be done for the love of music.  
If I get enough of a response I'll keep posting my 
improvements, and other projects.  

The files are currently sitting on (but you know this):
sun.soe.clarkson.edu
pub/dac

THEY ARE POST-SCRIPT FILES, and should be sent directly to a 
postscript printer.  If you need another format, let me know
(write the format you want on the back of a 20$ bill and mail 
it to me :-)   ).

The files are broken down as follows:

BDACV3.*  : These files are for a Burr-Brown PCM63 based DAC.
            This DAC uses a 12AT7 output tube for it's analog      
            stage.  It is much more complex than the DACJR3.
            
DACJR3.*  : This DAC is base around the Crystal Semi. CS4328
            chip.  This chip is almost a complete DAC on a 
            single chip.  It is a very good value, and makes 
            a good first attempt at DAC work.  

The files suffixes are as follows:

*.prt       Parts lists for the DAC (does not include cases
            or off board parts like switches or cords).  
            Page numbers are for the latest Digikey catalog
            (1-800-DIGIKEY).  

*.sch       DAC schematic

*.lay       Board Layout, Ground plane is on component side.
  

Enjoy them and let me know what you think of them.

         Sheldon Stokes
         102 Windy Cove Apt A
         Hampton VA 23666

home:    (804) 766-0392
office:  (804) 864-5520
Email:   stokes@bart2.larc.nasa.gov
         stokessd@sun.soe.clarkson.edu

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***       Life is a shit sandwich, the more bread         ***
***          you have, the less shit you taste            ***
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