Rod Speed wrote:

"Chris Green" wrote in message
...
Roger Hayter wrote:
Rod Speed wrote:

Fredxx wrote
Rod Speed wrote

It uses kinetic energy to send a wifi signal to the base.

You were doing well until this point.

That's what it does. No battery no wires.
https://www.amazon.co.uk/Philips-Per...ting-Synthetic
s/dp/ B0748MQWP3/ref=dp_ob_title_light

I'd prefer to call it mechanical rather then kinetic energy, without
further information. But perhaps he was suggesting that Wifi was not
really an appropriate radio protocol for the purpose?

All the makers and sellers of them call them kinetic for some strange
reason.

That's because that's what they are. They don't use the static force
of the finger on the button, they use the movement of the button.

But the energy supplied is nothing to do with the speed of the press.
The energy provided by the finger is force times distance moved. This
is not kinetic energy at any stage, or if it is, only internal to the
machine. The energy supplied by the operator is not kinetic energy.

--

Roger Hayter