Radio Shack Echo Kit

[Paul Maddox]

All,

  HT8955, YUCK!!! I built one of these...
what a waste of IC sockets.. its noisy as hell.. sooo much
digital bleed through from the main oscilator circuit, that
its next to unusable.

  Just thought Id say...

  Paul


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-----Original Message-----
From:	Byron G. Jacquot [SMTP:thescum at surfree.com]
Sent:	Sunday, September 05, 1999 3:21 AM
To:	synth-diy at mailhost.bpa.nl
Subject:	Re: Radio Shack Echo Kit

>but I was looking at that kit too... I was thinking about buying a few of
>them.... or at least finding out what the "specific echo chip" is... and
>gettign a bunch of those..

It mgiht be the Holtek 8955 echo chip.  It's got AD/DA converters, plus
address and data lines for a RAM.  With an 8955 and a RAM, that would be the
"two echo chips" mentioned in the original post.

For those looking into Holtek chips, you might also want to check out the
8950, a "voice modulator" chip.  They also make some 3-pin packaged devices
that will play "Happy Birthday", etc.

Byron