Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!pasteur!cory.Berkeley.EDU!johnhlee
From: johnhlee@cory.Berkeley.EDU (John Lee)
Newsgroups: comp.sys.amiga
Subject: Re: PD Sound Digitizer
Message-ID: <9594@pasteur.Berkeley.EDU>
Date: 7 Feb 89 13:52:35 GMT
References: <8902040004.AA00952@jade.berkeley.edu<
Sender: news@pasteur.Berkeley.EDU
Reply-To: johnhlee@cory.Berkeley.EDU.UUCP (John Lee)
Organization: University of California, Berkeley
Lines: 28

In article <8902040004.AA00952@jade.berkeley.edu< MOLNARRM@UREGINA1.BITNET writes:
<Well I was wasting time in Radio Shack yesterday when I found they had
<8 bit analog to digital converters for $10 apiece.   I dont have much
<electronics background, but I have seen a few sound digitizers, and it
<seems to me they are relatively simple to make ( well compared to a LUCAS
<board anyways.)   So I was wondering if some kind soul out there might
<direct me to PD schematics of a sound digitizer.  Has anyone used the
<Radio Shack 8-bit A/D chip?  Could you post your info to comp.sys.amiga?
<
<Thanks in Advance
<
<Dennis Gorrie  <MOLNARRM AT UREGINA1.BITNET>
<
<' Chain-Saw Tag... Try it... You'll like it!! '

Hmmmm.  If it's the same chip I think it is, I don't think you can use
it for a sound digitizer.  If it's a 8-pin package, then I believe the
chip communicates serially, and it digitizes at too slow a rate for a
decent sound sample (it think it works at well below the 10kHz.)  I looked
at this chip when I was designing my sound digitizer.  I finally used a
ADC0809 that I happened to have, but I had to push its clock to ~1.5x its
rated max before it would sample at 40kHz (kids, don't try this at home.)
It's actually relatively simple.  If there's a demand, I may post my
schematics; but then again, I may not--it's such a kludge!
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