On Apr 13, 2006, at 6:11 PM, Peter Todd wrote:

>> In particular, can I make reliable lithium power-fail
>> safety lights that I can just stick to a wall anywhere in the
>> average USian home?
>
> You should look up Quantum Research Group's QTouch series of ICs,
> for instance the QT110 chip. They work by measuring the
> capacitance change when someone touches an electrode.

I'm not looking for a touch switch this time.  I'm looking for
something that can detect power failures without being connected
to wires...

BillW
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