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PT2395 Evaluation Board

PT2395 Evaluation Board

2004-01-21 by Scott Stites

Hi,

I was thrilled to hear that there is going to be a PT2395 evaluation board coming
soon. I've enjoyed playing with the PT2399, and I have a few PT2395's as well,
but have yet to hook them up to anything. I'm glad to see there's an evaluation
board coming, as the data sheet example is a bit hard to read, for one thing.
Having the RAM external I think will provide a lot of opportunity for tinkering.
Is there any preliminary info on this board?

Cheers,
Scott

________________________________________________
PeoplePC: It's for people. And it's just smart.
http://www.peoplepc.com

Re: PT2395 Evaluation Board

2004-01-21 by sasami@hotkey.net.au

>I was thrilled to hear that there is going to be a PT2395 evaluation board
>coming soon.

>Is there any preliminary info on this board?

That would require me actually doing something!!

The boards are in stock, and as far as I can tell have only one minor error
(missing a power trace). I have had my proto working. It contains the app
note circuit for the the PT2395 with room for experimentation, as well as a
NE570/NE571 compressor/expander and a buffer, and provision for an
experimental phase lock loop or VCO clock based on the 74HC4046.

Ken
_______________________________________________________________________
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

Re: PT2395 Evaluation Board

2004-01-21 by Scott Stites

That sounds great! The compander would be a nice touch. I've been thinking
about fooling with the RAM address lines to see how short of a delay might be
possible (for flanging, chorusing, etc.). Also, maybe see if there's some way to
switch in an 'infinite' echo. This board sounds like it would be a great module
in itself and also a jumping off point for learning more about the chip.

Cheers,
Scott
Show quoted textHide quoted text
On Thu, 22 Jan 2004 08:30:45 +1100, sasami@... wrote:

>
> >I was thrilled to hear that there is going to be a PT2395 evaluation board
> >coming soon.
>
> >Is there any preliminary info on this board?
>
> That would require me actually doing something!!
>
> The boards are in stock, and as far as I can tell have only one minor error
> (missing a power trace). I have had my proto working. It contains the app
> note circuit for the the PT2395 with room for experimentation, as well as a
> NE570/NE571 compressor/expander and a buffer, and provision for an
> experimental phase lock loop or VCO clock based on the 74HC4046.
>
> Ken
> _______________________________________________________________________
> Ken Stone sasami@...
> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>
>
> See the following URLS for the CGS Modular Synth home page:
> Main: http://www.cgs.synth.net/
> Secondary: http://otherunicorn.0catch.com/synth/
>
> Yahoo! Groups Links
>
> To visit your group on the web, go to:
> http://groups.yahoo.com/group/cgs_synth/
>
> To unsubscribe from this group, send an email to:
> cgs_synth-unsubscribe@yahoogroups.com
>
> Your use of Yahoo! Groups is subject to:
> http://docs.yahoo.com/info/terms/

________________________________________________
PeoplePC: It's for people. And it's just smart.
http://www.peoplepc.com

Re: PT2395 Evaluation Board

2004-01-21 by sasami@hotkey.net.au

>That sounds great! The compander would be a nice touch. I've been thinking
>about fooling with the RAM address lines to see how short of a delay might be
>possible (for flanging, chorusing, etc.).

I've thought of that too, so some of the address lines have positions where
you can cut them, put in a pull-up resistor and switch.

> Also, maybe see if there's some way to switch in an 'infinite' echo.

This I'm not sure about as the RAM is dynamic. I'm not sure what will happen
if the write is disabled, but I suspect refreshing of the RAM may fail
(depends on the exact chip type, I think).

Ken
_______________________________________________________________________
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

Re: PT2395 Evaluation Board

2004-01-26 by Fernando

Yeah, I vote for ultra short delay implementations (not only for
flanging but for analog physical modeling approaches!)
Very excited about seing this board working that way!
Cheers to all,
Fernando
Show quoted textHide quoted text
> That sounds great! The compander would be a nice touch. I've been
thinking
> about fooling with the RAM address lines to see how short of a
delay might be
> possible (for flanging, chorusing, etc.). Also, maybe see if
there's some way to
> switch in an 'infinite' echo. This board sounds like it would be a
great module
> in itself and also a jumping off point for learning more about the
chip.
>
> Cheers,
> Scott
>
>
>
> On Thu, 22 Jan 2004 08:30:45 +1100, sasami@h... wrote:
>
> >
> > >I was thrilled to hear that there is going to be a PT2395
evaluation board
> > >coming soon.
> >
> > >Is there any preliminary info on this board?
> >
> > That would require me actually doing something!!
> >
> > The boards are in stock, and as far as I can tell have only one
minor error
> > (missing a power trace). I have had my proto working. It contains
the app
> > note circuit for the the PT2395 with room for experimentation, as
well as a
> > NE570/NE571 compressor/expander and a buffer, and provision for
an
> > experimental phase lock loop or VCO clock based on the 74HC4046.
> >
> > Ken
> >
_____________________________________________________________________
__
> > Ken Stone sasami@h...
> > Modular Synth PCBs for sale
<http://www.blaze.net.au/~sasami/synth/>
> > Australian Miniature Horses & Ponies
<http://www.blaze.net.au/~sasami/>
> >
> >
> > See the following URLS for the CGS Modular Synth home page:
> > Main: http://www.cgs.synth.net/
> > Secondary: http://otherunicorn.0catch.com/synth/
> >
> > Yahoo! Groups Links
> >
> > To visit your group on the web, go to:
> > http://groups.yahoo.com/group/cgs_synth/
> >
> > To unsubscribe from this group, send an email to:
> > cgs_synth-unsubscribe@yahoogroups.com
> >
> > Your use of Yahoo! Groups is subject to:
> > http://docs.yahoo.com/info/terms/
>
> ________________________________________________
> PeoplePC: It's for people. And it's just smart.
> http://www.peoplepc.com

Re: PT2395 Evaluation Board

2004-01-28 by Jeff Foster

yeah this looks neat.

did yeah see the pcb over at guitar gadgets ?

look for the PT-80 delay...neat thing.

Jeff
Show quoted textHide quoted text
--- In cgs_synth@yahoogroups.com, sasami@h... wrote:
> >That sounds great! The compander would be a nice touch. I've
been thinking
> >about fooling with the RAM address lines to see how short of a
delay might be
> >possible (for flanging, chorusing, etc.).
>
> I've thought of that too, so some of the address lines have
positions where
> you can cut them, put in a pull-up resistor and switch.
>
> > Also, maybe see if there's some way to switch in an 'infinite'
echo.
>
> This I'm not sure about as the RAM is dynamic. I'm not sure what
will happen
> if the write is disabled, but I suspect refreshing of the RAM may
fail
> (depends on the exact chip type, I think).
>
> Ken
>
_____________________________________________________________________
__
> Ken Stone sasami@h...
> Modular Synth PCBs for sale
<http://www.blaze.net.au/~sasami/synth/>
> Australian Miniature Horses & Ponies
<http://www.blaze.net.au/~sasami/>

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