Google "anemometer circuit"
And you will find a bunch of different kinds of simple anemometer cirucits
that are easy to homebrew...
73, DX, de Pat AA6EG firstname.lastname@example.org;
Moon or Bust!--Jamesburg Gang Rides Again!
>From: Alan NV8A <email@example.com>
>To: towertalk reflector <firstname.lastname@example.org>
>Subject: Re: [TowerTalk] Where can I get a *simple* *cheap* anemometer for
>Date: Wed, 09 May 2007 21:54:04 -0400
>On 05/09/07 09:36 pm Rick Karlquist wrote:
> > I would like to monitor wind speed using a simple
> > cup anemometer to determine when it is time to
> > crank down the tower. In looking for anemometers,
> > I have only found extremely expensive solutions that
> > indicate wind direction as well as speed, and require
> > a complete "weather station" in the shack, and even then, no
> > analog wind speed output voltage. All I want is a cup
> > assembly connected to a velocity to voltage transducer
> > (tachometer sensor).
> > I found a source of anemometer cup assemblies at a
> > place called Forcefield. I am about ready to build
> > my own anemometer out of an old hard drive motor,
> > but I thought I would ask what other people with tower
> > anemometers are using (I know you are out there...)
> > before embarking on this science project.
>I've been thinking about the same thing, so please send your suggestions
>to the list instead of just to Rick.
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