On Mon, 21 Dec 2020 00:54:14 +0000 (GMT), Dave Plowman (News) wrote:

In article ,
Jethro_uk wrote:
On Sun, 20 Dec 2020 17:37:18 +0000, Dave Plowman (News) wrote:

In article ,
Jethro_uk wrote:
On Sun, 20 Dec 2020 14:55:09 +0000, Dave Plowman (News) wrote:

In article ,
Harry Bloomfield wrote:
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Lots of these sort of things use 'tactile' switches. My car remote
control does. And they all seem relatively short lived.

If they are pizeo, surely there's quite a high voltage to be dealt with
?

Not quite sure why they'd be 'pizeo'?

*Shrug*

I saw an array of IoT crap at IBM a while back. "Kinetic" switches etc.
They were pizeo powered. Meaning you could stick them anywhere with no
need for wiring.

Ah - right. Didn't think of that. But wouldn't the push button move the
crystal mechanically to generate the power rather than being a switch?

My KE 'button' sends the signal upon realease, so it looks as if the push
generates energy both ways. It's hinged at the top so that there isn't a
joint or crack there (not really a hinge, that I can see, perhaps summat
else?). It has a rating of IP(?)5 (can't remember the first figure).
It came with two plug-in sounders; I've split them upstairs and downstairs,
in rooms away fom the party wall and can hear them from all over the house.
One drawback is lack of portability - one in my pocket when I'm in the
garden...
--
Peter.
The gods will stay away
whilst religions hold sway