Help please, I am a digital dunce, and not at ease with logic circuits.
I have 3 membrane buton switches each with an associated LED.
Here is what I want....
a) The button pressed dominates (cancels whichever of the other 'positions' was on), and latches.
b) No strange latchups if more than one button pressed accidently.
c) On power up a jumper determines which 'position' is on.
d) Could your idea be extended to N positions with N buttons?
I have supplies of +5, +12, +- 10 & +- 15 available. Load is minimal.
Any ideas please? It seems so straightfoward, but I'm struggling, and I refuse to use a micro.
I have 3 membrane buton switches each with an associated LED.
Here is what I want....
a) The button pressed dominates (cancels whichever of the other 'positions' was on), and latches.
b) No strange latchups if more than one button pressed accidently.
c) On power up a jumper determines which 'position' is on.
d) Could your idea be extended to N positions with N buttons?
I have supplies of +5, +12, +- 10 & +- 15 available. Load is minimal.
Any ideas please? It seems so straightfoward, but I'm struggling, and I refuse to use a micro.