[sdiy] Simple analog Keyboard encoder?

[Theo]

The "stylus" keyboard of the Elektor Chorosynth comes to mind.
The chorosynth "key board" is a very simple CV and Gate setup.
And the keys are just metal surfaces (on a PCB) that you touch with a
"stylus" (read: banana jack).

However I can't find the schematic online for you :(
Libraries often have Elektor issues, so you may find it there.

The chorosynth dates from 79/80, and was published twice.

-First version was part of a design contest, has no PCB and uses a switch in
the "stylus" for the gate.
Ultra simple electronics. Only a divider row for the CV really,
but the gate switch makes it somewhat hard to play.

- The second version (April '80 in the Dutch edition) comes with a PCB and
electronic generated gate.
This one is much better playable, and still a very simple setup.

HTH
Theo



From: Jaroslav Lukesh <lsh.synth at seznam.cz>


> Hi all,
>
> I was make to my childs small analog synth, but is hard to play exact tune
> with knob and pushbutton. He wants small keyboard. Does somebody have
> schematic or URL to very simple keyboard encoder?
>
> Output trigger and CV in V/Oct
>
> Many thanks,
>
> J. Lukesh
>
>
>