[sdiy] Spartan III proposal...

[harrybissell]

Don't forget a huge pile of decoupling caps...    :^P

xxx

H^) harry

James Patchell wrote:

> Well, to tell you the truth, I hadn't considered some of those.  I can add
> a 12 bit A/D with a 16:1 mux for things like pots.  For switches and LEDs,
> there are a total of three connectors on the Starter Kit board for
> "expansion".  I cannot imagine using more than two of those....oh wait, I
> am putting a ATMega128 on the board, that has 8 10 bit A/D channels, and it
> will also have extra pins to do things like drive LEDs and sense
> switches...(besides the FPGA)...is that enough user interface?....Like I
> said, I am open to suggestions...
>
> At 07:19 PM 2/24/2005 -0600, John Loffink wrote:
> >Jim,
> >
> >How many inputs would you have dedicated for pot and switch controls and how
> >many outputs for LEDs?  I am assuming the UI will be analog-like.
> >
> >John Loffink
> >The Microtonal Synthesis Web Site
> >http://www.microtonal-synthesis.com
> >The Wavemakers Synthesizer Web Site
> >http://www.wavemakers-synth.com
> >
> >
> > > -----Original Message-----
> > > From: owner-synth-diy at dropmix.xs4all.nl [mailto:owner-synth-
> > > diy at dropmix.xs4all.nl] On Behalf Of James Patchell
> > >
> > > Group...
> > >
> > >          I decided to get myself one of these:
> > >
> > > http://www.xilinx.com/products/spartan3/s3boards.htm
> > >
> > >          This is the Xilinx Spartan III starter kit.  What I am planning
> > > on
> > > doing is making a board that interfaces to this that will have 8
> > > 24bit/192Ksps ADCs and 8 24bit/192Ksps DACS so that the kit can be used
> > > for
> > > doing some pretty powerful Digital Audio processing.  Now the big question
> > > is, is anybody else interested.  The big bug-a-boo is that the add on
> > > board
> > > will almost certainly have to use surface mount technology...I am
> > > personally not happy about that, but that is pretty much the only way the
> > > ADCs and DACs come these days.
> > >
> > >          I am still trying to decide whether to use Crystal Semiconductor
> > > or Analog Devices Delta Sigma parts.  Any suggestions are welcome...Oh
> > > yes,
> > > I was also thinking of maybe putting a spot on the board for a
> > > ATMega128...but I am still debating that.
> > >
> > >          Any suggestions?  Any Interest??  Remember, the Webpack that
> > > Xilinx provides to program the board with is free...
> > >
> > >
> > >          -Jim
> > > ***************************************************************
> > > http://www.oldcrows.net/~patchell
> > >
> > > ***************************************************************
> > >
>
>          -Jim
> ***************************************************************
> http://www.oldcrows.net/~patchell
>
> ***************************************************************