Cgs synth

Dave. thanks alot for this info. this is pretty much exactly what im looking for. all i can
really find available new are the diode matrix type keyboards and now i guess ill just have
to convert one.

thanks a bunch. Lance Iden

--- In cgs_synth@yahoogroups.com, Dave Kendall <davekendall@...> wrote:
>
> Hi.
> I haven't tried this, but these docs might be of use. They show how to
> convert an old casio keyboard for CV/gate use. The second is a
> collection of notes from the old (now defunct) EFM forum.
> Some EFM B.O.M.s had the odd wrong value - go by the schemo. They were
> also designed for ±12V use, so if using ±15V, some parts may need
> changing....
>
> http://www.modular.fonik.de/files/EFMforum/orgEFMfiles/kbd2e.pdf
> http://www.modular.fonik.de/files/EFMforum/KBD%202E%20forum.pdf
>
>
> EFM is now not trading anymore, so no boards available, but the schemos
> might be useful.
>
> hope this helps, good luck :-)
>
> cheers,
> Dave
>
> On Dec 6, 2008, at 19:36, x24holsey wrote:
>
> > Doepfer posts the schematic of the internal workings of the Fatar
> > assembly. Not
> > complicated but plenty of parallel switch closures with diodes from
> > the 2x61 notes shown.
> > The system is scanning all the contacts looking for closure of each
> > specific switch pair
> > which have a midi note mapped to them inside the Doepfer sub
> > assembly/controller. The
> > difference between this digital-kbd and the analogue type of keyboard
> > you want is the
> > lack of the resistor ladder to furnish the change of 1volt/octave
> > change of output from a
> > common pitch bus.
> >
> > If you wanted to butcher such a device, you are on your own, but one
> > might think you
> > could replace the diodes-warranty void- with suitable resistors to
> > constitute the required
> > ladder and sum the output to feed to your monophonic controller. I
> > paraphrase here, but
> > surely it's liable to be a bit more complicated than this but that's
> > the gist of it. I'm not a
> > service tech mind you but you would have a clean assembly but could
> > destroy the Fatar if
> > you weren't careful. Again warranty void once you start soldering.
> > Doepfer route is plug
> > and play no soldering but will require decoding midi to
> > cv/gate/trigger.
> >
> > Depends on what you want to put into it and what you expect out at
> > jobs end, how much
> > DIY re-invention you undertake.
> >
> > I have a pdf here but will forward directly to your address instead
> > of further annoying the
> > group. Probably really an MFOS post if there is such a group mind you
> > after all this text.
> >
> > Best of luck
> > c~h
> >
> > --- In cgs_synth@yahoogroups.com, "waynerdlance" <lance.iden@>
> > wrote:
> > >
> > > i actually posted on a couple forums. now that i read the first
> > post i wasnt to specific.
> > > thanks for your input and im curious what the actuall switch
> > mechanism.s consist of on
> > a
> > > midi keyboard. maybe it could be adapted. anyways anyone with a
> > schematic or a
> > > password to dowload a schematic/mechanical design from the FATAR
> > site would be
> > > awesome.
> > >
> > > Thanks Lance
> > >
> > >
> > >
> > >
> > > --- In cgs_synth@yahoogroups.com, "x24holsey" <waveguide@> wrote:
> > > >
> > > > Lance,
> > > >
> > > > Since we're on the cgs-synth mail group I thought you were
> > referring to Ken's small
> > > mini
> > > > keyboard project board. Your verbage suggested the MFOS board
> > mind you.
> > > >
> > > > You used to be able to buy when Pratt-Read was the keyboard
> > manual supplier to the
> > > > planet, such an item. Most I am aware of are Midi. You might
> > cannibalize an otherwise
> > > > written off vintage synth for cheap, if you dare and salvage the
> > keyboard assembly.
> > > >
> > > > Not that much of a service tech to point you at modern sources of
> > any suitable "OEM"
> > > > keyboard assembly that isn't midi'd out already.
> > > >
> > > > Otherwise you might find simple switches of some kind for a
> > eclectic DIY touch
> > > keyboard
> > > > which appeals to me somehow, ... one day. Maybe someone else
> > listening can be
> > more
> > > > helpful.
> > > >
> > > > --- In cgs_synth@yahoogroups.com, "waynerdlance" <lance.iden@>
> > wrote:
> > > > >
> > > > > im actually looking for a keyboard that would be compatible
> > with the mfos 1v/oct
> > > > > keyboard controller pcb. ive seen the fatar keyboards on the
> > doepfer site but i cant
> > > find
> > > > a
> > > > > schematic for the actual outputs of the keyboard. im looking
> > for a single buss
> > > keyboard?
> > > > i
> > > > > dont really want to go the keyboard/midi/cv route for
> > simplicities sake.
> > > > >
> > > > > Thanks Lance Iden
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > --- In cgs_synth@yahoogroups.com, "x24holsey" <waveguide@>
> > wrote:
> > > > > >
> > > > > > --- In cgs_synth@yahoogroups.com, "waynerdlance"
> > <lance.iden@> wrote:
> > > > > > >
> > > > > > > hey just wondering if anyone knows of a source for
> > compatible keybaord
> > > > assemblies
> > > > > for
> > > > > > use
> > > > > > > with the keyboard controller. im looking for something new
> > (dont really want to
> > > > > dissect
> > > > > > other
> > > > > > > keyboards) any leads would be greatly appreciated.
> > > > > > > Thanks Lance Iden
> > > > > > >
> > > > > >
> > > > > > It feels like you might be looking for some of the more DIY
> > switch assemblies to
> > > make
> > > > a
> > > > > > small touch keyboard/button so have a look at the Doepfer
> > site.
> > > > > >
> > > > > > http://www.doepfer.de/home_e.htm
> > > > > >
> > > > > > Doepfer sell plenty of DIY esoterica components in addition
> > to real Fatar keyboard
> > > > > manuals
> > > > > > with plug-in sub-modules. Specific to what you mention above,
> > they do have an
> > > 8x8
> > > > > switch
> > > > > > matrix: CTM64 button board , that might be along the lines of
> > what you need.
> > > > > >
> > > > >
> > > >
> > >
> >
> >
> >
> >
>