[sdiy] Aftertouch via Pressure

[James Patchell]

         And just make a big mess....I had some parts in black foam in 
plastic drawers...for almost 20 years...when I went to use the parts again, 
instead of foam, there was black power...(bad choice of words...if you are 
a Musket fan :-)....what a mess...the stuff stuck to the leads....and it 
got everywhere...every time I find parts in black foam, I remove them and 
put them in tubes.

         -Jim

At 09:24 AM 7/11/2003 +1000, Ken Stone wrote:
>That CMOS foam was all the rage for presure sensors at one time.
>Unfortunately, it seems to have a limited life. Any I have here with chips
>in it has gone bad. It perrishes, and even worse, becomes corrosive.
>
>Ken
>
> >Yes ARP Soloist and Pro Sololist use CMOS foam under the hinged keyboard as
> >the pressure sensor. I forget what the Multimoog uses but I think it's the
> >same approach. Not sure about the ARP Pro DGX because I don't have one, but
> >I'll bet it's CMOS foam too. Hey I was at an ARP demo, at ABC Music in
> >Burbank back when I was in high school. Boy was that neat. Helped to put me
> >on this nutty road I'm on for life. The first first first wake-up call I
> >ever got was at Springfield Music in Northridge, where my buddy and I rode
> >our bikes to, and there was a Minikorg and a Synthacon in there. I'd like to
> >find both of those someday but the ebay prices at the moment are just too
> >steep.
> >
> >- Gene
> >
> >
> >-----Original Message-----
> >From: harrybissell [mailto:harrybissell at prodigy.net]
> >Sent: Thursday, July 10, 2003 1:16 PM
> >To: Glen
> >Cc: jhaible at debitel.net; The Peasant; synthdiy at sdiy.org;
> >xyzzy at sysabend.org
> >Subject: Re: [sdiy] Aftertouch via Pressure
> >
> >
> >If you are willing to hinge the entire keyboard.... then optical, and
> >resistive
> >methods
> >are easy as well.
> >
> >iirc (but it has been a long, long time) the ARP ProSoloist had aftertouch
> >from
> >a mechanically
> >pivoting keyboard...  otoh that one I saw was the FIRST time I saw any
> >synthesizer in the flesh... along with the Odyssey and 2600 models.  (high
> >school demonstration)
> >
> >H^) harry
> >
> >
>_______________________________________________________________________
>Ken Stone   sasami at hotkey.net.au
>Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
>Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>