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vasi

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Joined: 23/03/2007
Location: Romania
Posts: 1697

Posted: 01:26pm 04 Apr 2010

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Which one is suitable for anemometer?

See them here.

Thank you!

Hobbit name: Togo Toadfoot of Frogmorton
Elvish name: Mablung Miriel
Beyound Arduino Lang

Janne
Senior Member

Joined: 20/06/2008
Location: Finland
Posts: 121

Posted: 01:39pm 04 Apr 2010

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I'd say none. I've had 2 reed relay anemometers, and in both the reed's failed before lasting a year. Optical system works much better in the long haul.

If at first you don't succeed, try again.

My projects

vasi

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Joined: 23/03/2007
Location: Romania
Posts: 1697

Posted: 02:32pm 04 Apr 2010

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Janne said I'd say none. I've had 2 reed relay anemometers, and in both the reed's failed before lasting a year. Optical system works much better in the long haul.

Ok then...

I have this option:

TLE4905L Hall sensor, digital output, unipolar (or maybe TLE4935L bipolar).

2010-04-05_003213_TLE4905L.pdf

Hobbit name: Togo Toadfoot of Frogmorton
Elvish name: Mablung Miriel
Beyound Arduino Lang

Downwind

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Joined: 09/09/2009
Location: Australia
Posts: 2333

Posted: 09:47am 08 Apr 2010

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Hi Vasi,

A hall sensor will work ok but some need an opamp or comparitor to set the signal level for use with a micro as they dont switch to 0 level and the micro will not detect the level change.
Most will give a level change of +/- of half the supply voltage.

I used a photo interupter same as janne said.
If you can find an old bubblejet printer some of them have very good photo interupters in them.
There was a thread a few weeks back that i posted some information to, i think it was called Aneomometer build time ... or something simular.

Have you worked with Hall effect sensors before?

Pete.

Sometimes it just works

vasi

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Joined: 23/03/2007
Location: Romania
Posts: 1697

Posted: 10:07am 08 Apr 2010

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Downwind said Hi Vasi,

A hall sensor will work ok but some need an opamp or comparitor to set the signal level for use with a micro as they dont switch to 0 level and the micro will not detect the level change.
Most will give a level change of +/- of half the supply voltage.

I used a photo interupter same as janne said.
If you can find an old bubblejet printer some of them have very good photo interupters in them.
There was a thread a few weeks back that i posted some information to, i think it was called Aneomometer build time ... or something simular.

Have you worked with Hall effect sensors before?

Pete.

Hi,

Never before. I know this one have a digital response (is not analogue). I will look for your thread, thank you.

Vasi

Hobbit name: Togo Toadfoot of Frogmorton
Elvish name: Mablung Miriel
Beyound Arduino Lang

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