"Roger Hayter" wrote in message
...
Fredxx wrote:

On 15/03/2019 15:21, 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...g-Synthetics/d
p/B0748MQWP3/ref=dp_ob_title_light

So what you are now saying is it uses mechanical energy to generate a
wireless signal.

Designing a nano-scale 433MHz dynamotor might be an interesting exercise
for a graduate student, but hard to modulate. I am imagining a special
cam. But I suspect they convert the force to electrical power first,
perhaps piezoelectric?

They wouldn’t call it kinetic if they did it that way.

They arent cheap and I don’t have one so I don’t plan to tear
one down to see how they work. Big Clive might well have tho.