[sdiy] Semi-ot: bistable switch

[Roy J. Tellason]

On Friday 17 September 2004 10:59 am, Karl Ekdahl wrote:
> Hi all. I've been banging my head for a day now trying
> to do a simple bistable switch. one press and it's on,
> another press and it's off and so on, state indicated
> by a led. the actual push button will only be able to
> deliver a +5v signal while depressed and the switch
> has to be resetable. i've tried doing this with 7474's
> (i've got way too many of those) but haven't had any
> success. I need at least eight of these in a small
> space. could anyone help me? this is newbie problem, i
> know, but it's making my head cook.

ARP used something like this a lot on some of their later stuff,  though I'm 
blanking at the moment on the model numbers.  Maybe Omni II?  For sure some 
other stuff as well.  My manuals aren't handy but to the best of my 
recollection they used 4013 FFs and some other bits...