Need some help please

Ok,
Sometime back, I found somewhere on the net a file that indicated how
I could use a "flip-flop" to be able to home to an index on my servo.
After spending a couple of days on trying to find it, I am asking for
some help.

I am about to embark on designing a new break out board and want to
be able to implement this feature. I can understand the logic, but am
having some problem implementing it in hardware!

Basically, one would home to a switch, and trip it. Then back off
until you "reset" the switch and then keep going until you hit the
"index" on the encoder.

Any ideas?????


Country Bubba