AW: [sdiy] Calculator Synth

[Ullrich Peter]

>A 74c923 keyboard decoder chip can look after the scanning of a 4x5
array of
>switches, and outputs a binary value. Couple it to a DAC, and you are
done.
>It even supplies a "trigger" signal when a key is pressed. I think
someone
>used this as a basis for a set of foor pedals ala Taurus too.

Yes, this circuit is very nice! And also the smaller part 74C922 for
only 16 keys in a
4x4 matrix. I used the 74C923 in some computer circuits and they works
really fine!

I have a datasheet in PDF format if anyone needs it (130kB).

Ciao
Peter

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                   Ing. Peter Ullrich         mailto:ullrich at kapsch.net
                   Homepage: www.ullrich.at.tt , http://come.to/ullrich
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   .oooO           Hardware & Software Developer /  Electronic Musician
   (   )   Oooo.   KAPSCH AG / ECCN Control Systems    Vienna / Austria
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