[sdiy] Simple analog Keyboard encoder?

[Jaroslav Lukesh]

: >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?

Many thanks to all, I have 5 schems now from easy (lm324+JFET) to hard. So
little overview:

www.cgs.synth.net/tube/controller.html
	lm324, n-channel JFET

www.cgs.synth.net/modules/cgs10_pedal.html
	74922, TL072, R-2R DA !!interesting method but for large scale analog
keyboards only. It could be usable in combination with MIDI-OUT interface
(in case if you use microcontroller instead of 74922)

atlas.csd.net/~rjwsoft/keybrdcontroller.html
	hard design

www.ele4music.com/kbd2e/kbd2e.html
	LM324, LM13600, N-JFET

Choro2.gif
	from chorosynth, key part has lm234 + 741, N-JFET


Regards J. Lukesh