The recent discussions of touch switches/etc, combined with local storms and
power failures make me wonder:

Can a battery-powered device with no AC line connection sense a power failure
by noticing the LACK of any 60Hz pickup?  Given sufficient care in battery
life preservation, that would make possible "stick up" emergency lighting
that didn't need to be connected to anything, which would be quite a neat
idea, IMHO...

BillW

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