Michael,

 For a no moving part anneometer, you could use a piece of technology
from the automotive industry.
 That would be the Hot Wire Mass Air Flow Sensor used on many cars and
trucks today.  It is basically=20
 two wires that are heated via an electric current.  One of them is
shielded from the airflow. =20
 The other is directly in the path of the airflow.  The air moving past
it cools it down.  Circuitry
 connected to the sensor then varies the current to bring it's
temperature back to where it was before=20
 the air started cooling it down.  This current then represents the mass
of air flowing across the wire=20
 and into the engine.  This could be recalibrated to indicate windspeed
instead of air mass, thereby
 providing you with a no moving part wind speed sensor.  If this is
mounted on an axle, and in=20
 conjunction with a wind vane and some LED's and photoreceptors, you can
have a purely electronic windspeed
 and direction indicator.  Just a thought.

 Regards,

 Jim

> -------- Original Message --------
> Subject: Re: [TECH] Wind Speed/Direction 'sensor' source.
> From: Michael Watterson <mike@radioway.org>
> Date: Thu, March 24, 2011 9:09 am
> To: "Microcontroller discussion list - Public." <piclist@mit.edu>
>=20
>=20
> On 24/03/2011 13:30, Olin Lathrop wrote:
> > Of course if this is a commercial
> > product, you'd be buying 100s, so whether they come in pairs or not doe=
sn't
> > matter.
>=20
> Hmm. If it was commercial I'd be happier to have to buy 10,000s And have=
=20
> it sold in supermarkets. 315MHz link USA, 433MHz link Europe to bring=20
> the info indoor, with the outdoor bit measuring shade temp, humidity and=
=20
> sunlight (sort of) via its solar charger.
>=20
> I've seen cheapish WX stations, but they seem to go for the inferior 3 x=
=20
> cups anemometer and wind vane.
>=20
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