I should have mentioned +v is 12v coming from my system's PSU.
-chuck

--- In Doepfer_a100@yahoogroups.com , "hamzzzald" <hylaster@...> wrote:
>
> Hand drawn schematic from lat year's notes:
> http://groups.yahoo.com/group/Doepfer_a100/photos/album/404340435/pic/1720022171/view picmode=&mode=tn&order=ordinal&start=1&count=20&dir=asc
>
> The pot R2 serves as a trim for range of the cv control coming from the FSR. The LM339 is a comparator chip - experiment with threshold value via R3 and R4. Hope this makes sense. Thanks and credit go to James Fei.
> -chuck
>
> --- In Doepfer_a100@yahoogroups.com , <david.salter@> wrote:
> >
> > Hi Chuck
> >
> > Would you be able to share the circuit for this
> >
> > Thanks
> >
> > David
> >
> > * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
> > * * *
> > David Salter
> > Senior Consultant
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> >
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> >
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> > david.salter@
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> >
> >
> > ________________________________
> >
> > From: Doepfer_a100@yahoogroups.com [mailto: Doepfer_a100@yahoogroups.com ]
> > On Behalf Of hamzzzald
> > Sent: 19 April 2009 09:14
> > To: Doepfer_a100@yahoogroups.com
> > Subject: 1 Re: tks
> >
> >
> >
> >
> >
> > This may be of interest to the group. I made a DIY touch controller last
> > year, inspired by the Buchla controllers we have at Mills College. Mine
> > uses FSR senors rather than touch capacitance. Each sensor has cv out
> > with adjustable range and a trigger out. There is also a master trigger
> > out and a Softpot "ribbon" sensor from Spectrasymbol. A very simple
> > circuit - just voltage dividers and a comparator for triggers. It has
> > been incredibly useful and has really opened up the performance
> > versatility of a small modular system.
> >
> > http://www.flickr.com/photos/chuckj/3269067821/
> > < http://www.flickr.com/photos/chuckj/3269067821/ >
> > http://www.cirrusoxide.com/journal/ p=75
> > < http://www.cirrusoxide.com/journal/ p=75 >
> >
> > Best,
> > Chuck
> >
> > --- In Doepfer_a100@yahoogroups.com
> > <mailto:Doepfer_a100%40yahoogroups.com> , "partlydrone"
> > <partlydrone@> wrote:
> > >
> > > hi dieter
> > >
> > > yes, addressed with buttons (or triggers, or voltages) wld be fine.
> > >
> > > i guess it would be pretty easy to develop too, although maybe costly
> > as it requires eg for a version playing four "notes / colours" of 3
> > voltages each it would need 4 buttons, 12 pots, 16 jacks etc.
> > >
> > > please, please make one i think it would be a surprise hit once
> > people realised what could be done with it, to suddenly skip between
> > tone colours, it's exactly what sets modulars apart from dreary samey
> > synths.
> > >
> > >
> > >
> > > i honestly think it would be a big seller
> > >
> > > --- In Doepfer_a100@yahoogroups.com
> > <mailto:Doepfer_a100%40yahoogroups.com> , <yahoo@> wrote:
> > > >
> > > > This function is not necessarily associated with a touch keyboard.
> > It's kind
> > > > of an dressed sequencer with 3 potentiometer rows. The addressing
> > can be
> > > > voltage controlled, Midi note controlled or button controlled. Of
> > course you
> > > > may use a TKB to adress the step of the sequencer but that's only
> > one of
> > > > many possibilities.
> > > >
> > > > Best wishes
> > > > Dieter Doepfer
> > > >
> > > > > i agree
> > > > >
> > > > > i really really want a controller that lets me press a button to
> > > > > change three CV's suddenly like that bugbrand controller, or the
> > > > > serge, or any random access sequencer. with my modular, sending
> > > > > quantised note CVs is the absolute last thing on my mind. i want
> > > > > to control microtones on ring modulating oscillators, the amount
> > > > > of reverb mix, and the bit crush depth, changing all three
> > > > > instantly, with a momentary finger press, and then play huge
> > > > > variations in those parameters like an instrument.
> > > > >
> > > > > i've been meaning to build my own controller for this for about a
> > > > > year and i think its a real shame that nobody else does. well,
> > > > > for less than the cost of a serge.
> > > >
> > >
> >
> >
> >
> >
> >
> >
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> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>