Quote: (Originally Posted by
David Pye)

My only dislike for 'constant green is good' is that for all I know, the control loop of whatever piece of kit updates it might have just frozen, so it will stay green forever.
Bruce has a good article on his site about why a fire alarm bell makes a poor alarm system - if the signs for something being 'not in alarm' are the same
as something being broken, then it's a poor alarm. I admit I feel the same about HUDs with constant LEDs, but then again, I now have a three-led HUD with the smithers code on it

hello Dave, the probability of having 2 systems that freeze at the same moment, is .... ??
we use the 'constant green' for safe AND optimal, and have 2 completely independant HUD's, so the risk of not noticing a frozen HUD is ... zero!
as far as I know, I NEVER heard of a frozen rEvodream ever.
paul