[sdiy] Pressing buttons

[j vallier]

My Moog Taurus pedal preset buttons use a circuit they describe as a 
"multi-flop latch" that does what I think you want done. You could rip off 
the circuit from the schematic avaliable on the net (or I can send to you). 
It uses NAND gates I believe... I used it once many years ago and seems 
robust--Taurus footswitches are the same as in the ice/water dispenser on 
your refrigerator. Tons o'noise and bounce but this circuit handles it fine.

HTH

Jeff


>From: ">>>marjan<<<" <urekar.m at EUnet.yu>
>To: Synth-DIY <synth-diy at dropmix.xs4all.nl>
>Subject: [sdiy] Pressing buttons
>Date: Sun, 12 May 2002 21:14:32 +0200
>
>
>I'm in need of nice little cct, there are 4 buttons SPST,
>I need 4 outputs, when you press button#1 output#1 goes to
>logic 1 (high) all other outputs to 0, press button#2
>output #2 goes high all others to 0 and so on.
>Also output must stay high until active, not just a pulse.
>And it should be CMOS.
>I'd make it but my mind spits just sorta priority
>codec with f-fs solution, with lotsa gates. There should
>be something more elegant and simple, even inside a cmos
>chip?
>
>I know you know it!
>And no PIC solutions please :)
>
>ThanX!
>
>--
>
>
>
>marjan
>
>
>me    : Marjan Urekar
>e-mail: urekar.m at eunet.yu
>s-diy : http://surf.to/marjansystems
>music : http://go.to/forcemajeure
>
>


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