[sdiy] IC Prototyping was: SSM2040

[bayne d'artagnan]

Of all of the CEMS the 3310 is the easiest to function clone. There
was a discussion about micro ADSRs on AH a while back. There is a nice
PIC based ADSR which you can download the source code for somewhere
online.  With that chip you get pretty close to the same functionality
along with the same ease of building. With a surface mount part and a
small daughterboard you could probably get a plug in replacement for
both 3310s and 2055/2056 chips.

Incidentally, the socket thing is a bit of a ruse. It doesn't really
matter to the polysynth owner who needs  a chip if you socket your
chips as yours are still off of the market.

I've never soldered a chip, even for repairs and I've never had a
socketed chip come back for further repairs. They might need to be
reseated every fifteen years or so, but really, the primary reason
synth manufacturers don't use sockets is cost.



On 11/3/07, Tim Parkhurst <tim.parkhurst at gmail.com> wrote:
> On 11/3/07, Dave Manley <dlmanley at sonic.net> wrote:
> snip
> > I'm a little surprised no one has done that before.
> > There must be piles of dead CEM parts laying around.
> >
> > -Dave
> >
>
> You would think, but perhaps they're more robust than that. I've got
> something like 25 of the little buggers and as far as I can tell, all
> of them work. That 3310 and an op amp make a great, quickie ADSR. Yes,
> it's in a socket. ;-)
>
>
> Tim (let the "quickie" jokes begin!) Servo
> --
> "Imagination is more important than knowledge." - Albert Einstein
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