Tino,

Again they reefer to an article that I have been unable to get my hands
on (Everyday Practical Electronics, January 2003, page 44-51 (*very*
interested in a copy if someone have access to it.). I haven't built one
and tested it in practice so I'm not sure that it works or how bad/good
it is. Still the concept is interesting.

Almost the same concept is used for water volume meters though and works
quite well. To level the measuring device up with the wind direction
would be trivial. Also it would be easy to use something else than a
chopstick to mount the sender received on.

Turbulence can possibly be a problem. Don't know how much influence it
has. Mounting the received/transmitter further apart may improve things.

Regards
/Ake

-----Ursprungligt meddelande-----
Fr=E5n: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]F=F6r B=FChler, Martin
Skickat: den 18 maj 2004 14:50
Till: PICLIST@MITVMA.MIT.EDU
=C4mne: Re: [PIC]: Weather Sensors


the wind speed sensor looks really interresting. but can you tell me how
this works?
I think it has always to be adjusted to the wind direction, to get
correct results.
in addition, the measure path will be in the wind shadow of the
transmitter, or there will be turbulences between transmitter and
receiver, giving wrong results.
further, from my experience, you will get ultrasonic transmission
through the chopsticks, if you mount both ultrasonic devices to them.
so I don't think that this will work very well.
any contrary experience?
tino


************************************************************************
******************************

>-----Original Message-----
>From: Ake Hedman [mailto:akhe@EUROSOURCE.SE]
>Sent: Friday, May 14, 2004 9:09 PM
>To: PICLIST@MITVMA.MIT.EDU
>Subject: SV: [PIC]: Weather Sensors
>
>Lawrence,
>
>I am working on some weather modules for the VSCP (http://www.vscp.org)
>project of mine. Don't now if they ever will be finished but it's fun
to
>work with... I will post the stuff I developed on the mentioned site
>with the first being a temperature & Humidity module. I use the SH11
>http://www.sensirion.com/humidity for this module with a 18F258.
>
>For wind speed there is an interesting kit from kitsrus (
>http://www.kitsrus.com/pdf/k168.pdf ) using Ultrasonic. Interesting
with
>something without moving parts.
>
>For pressure you have the Motorola parts. You have some 1-wire stuff
>here http://www.simat.enta.net/v3barocal.html that can easily be
adopted
>for a pic.
>
>For visibility I am looking into some scattering sensors. Should be
>doable with a PIC and some IR transmitter/sensors.
>
>I would love to be able to monitor lightning. Some stuff is abailable
on
>the net but the nicest solution would be to be able to detect distance
>as well as a strike.
>
>For rain AAG have some solutions. I think its hard to come up with a
>solution here that is without moving parts.
>
>The simplest and possibly the most low cost solution is to use 1-wire
>and the weather station from AAG http://www.aagelectronica.com . Maybe
>letting a PIC do the 1-wire part.
>
>Regards
>/Ake
>
>-----Ursprungligt meddelande-----
>Fran: pic microcontroller discussion list
>[mailto:PICLIST@MITVMA.MIT.EDU]For llile@SALTONUSA.COM
>Skickat: den 14 maj 2004 20:35
>Till: PICLIST@MITVMA.MIT.EDU
>Amne: [PIC]: Weather Sensors
>
>
>Anybody done a weather station with a PIC?
>
>What did you use for a barometric pressure sensor?  Wind speed sensor?
>
>Of course there are some stock sensors that come to mind (motorola?)
>mostly targeted at the industrial lab market ($$$).  I am looking for
>low
>cost consumer solutions that have already been tried.
>
>
>-- Lawrence Lile
>
>--
>http://www.piclist.com#nomail Going offline? Don't AutoReply us!
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>
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