Andy Burns wrote:
Graham. wrote:

wrote:

Just came across the MK Echo wireless switch system.

Interesting that the transmitter works without batteries by
"harvesting energy". I wouldn't have expected it to work.

This is the underlying technology ...

http://www.enocean-alliance.org/en/enocean_technology/

In California, where they're based, they just wait for a 'quake to shake
the building.

In a few years, they might just have a problem with overloading when the
big one hits.

--
Tciao for Now!

John.