Wireless batteryless remote lightswitch

["Ward, David" <DAvid.Ward@xxxxxxxxxx>]

>From Electronics Weekly

<http://www.electronicsweekly.com/articles/article.asp?liArticleID=3D38812&=
liA
rticleTypeID=3D1&liChannelID=3D115&src=3Drssfeed>


http://tinyurl.com/4ppu9

=09
Munich-based EnOcean is developing wireless domestic light switches which
generate their own power.

"The technology was developed in the central research department of
Siemens," said EnOcean. "A button is pressed and this energy is
used to
supply low-power electronics and to generate radio signals."

Its generators are piezoelectric, providing the 50=B5W required to transmit
the switch's unique code, one of four billion available.

With 7N of force pushing a 3.5mm travel button, the devices transmit 10mW
i=
n
three randomly-spaced 500=B5s bursts at 868.3MHz.

Claimed free-field range in 300m and there is space in the format to
includ=
e
data from local sensors.

Solar-powered sensor modules have also been developed and both solar and
piezo products are being manufactured by the firm.

The firm is a spin-out from Siemens.

www.enocean.com