I found this wind direction measurement circuit simple and interesting. If you are doing some home automation project, this might be another sensor that can be included in you project.
For Wind direction measurement you will need a circle from some material (you might even use CD disc.) Then stick an arrow on top. One end of arrow should have a fin. Other end of arrow sould have piece of magnet. Then put eight magnetic sensors around the circle in the magnets way. See drawing:

I think working of this sensor is very obvious. Turning Arrow depending on wind direction turns ON magnetic switches.
Circuit has 8 outputs corresponding to wind direction. These outputs can be connected to simple indication circuit, which can be in your room:

Depending on switch turned on the led indicator shows where the wind blows.
Of course this sensor can be easily adapted to any embedded system and display results on LCD or log changes in EEPROM memory for further analysis.
Hi! I really appreciate this big time! You see, our exams our next and we also have several projects that will really need a lot of time to finish., and this circuit can really help me big time! thanks a bunch! now all i need to do is use microprocessors and make the program that will display the degrees and direction of the wind on a handheld LCD.
Your circuit is a big help! I’ll try to study it now~! thanks!
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