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
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.
> > > > >
> > > >
> > >
> >
>
>
>
>