>>
Oh yeah.  Even "really bright" LEDs look pretty pitiful in bright sunlight.
Another good excuse for the voice add-on...
<<

If you can find them, "flip-mechanical" displays are excellent
in any light condition and generally have pretty reasonable
current requirements.  Not sure about surplus availability,
though--when new they probably cost a bundle.

Also, I go along 100% with much of what others have said re
safety: don't give launch authority to the PIC (except when
a button is being held down).  And then, of course, make sure
you clearly mark the thing and tell people never to push the
button if they're not expecting a launch.

Of course, some bozo will probably still manage to injure
himself by pusing the button when he doesn't think the thing
will really launch, but all too many bozos (even on occasion
police officers) pull the triggers on firearms and somehow
don't think they might fire ("I didn't know the gun was
loaded".)  Too bad so many people in this world have no clue
about how to use a modicum of safety-related common sense.




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