[sdiy] rotary encoder?

[Ullrich Peter]

And when you use the 74C923 you get 20 keys instead of 16 keys...
And yes, there is an application circuit that shows how to double the number of keys.

Ciao
Peter

________________________________________
Von: synth-diy-bounces at dropmix.xs4all.nl [synth-diy-bounces at dropmix.xs4all.nl] im Auftrag von Ingo Debus [igg.debus at t-online.de]
Gesendet: Donnerstag, 08. Jänner 2009 19:50
An: synth DIY
Betreff: Re: [sdiy] rotary encoder?

Am 08.01.2009 um 19:23 schrieb Dave Kendall:

> I wondered if a 74C922 might do the trick, along with a regular 12
> way 1 pole......

But how? The 74C922 requires the switches arranged in a matrix, and a
12 way 1 pole switch has one common contact for all 12 switches.
Perhaps a 12 way 2 pole rotary switch "back to back", with the two
common contacts connected, to emulate 12 individual switches?

But using this IC would probably simplify the elektor circuit Florian
mentioned.

Ingo
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