hi, im making a 3-cups anemometer with windvane. im planing to use a hall sensor to count the windspeed, but what about the wind direction? can i know which sensor is suit to measure both of the wind speed and wind direction?

 

you'd be putting a vane on it as well and using something to measure its position

 

you'd be putting a vane on it as well and using something to measure its position

yes, i have a vane on it but i dont know how to measure the direction of the wind.

 

to be honest with you, unless its a learning curve, it would probably be more time/cost effective to buy an 'off the shelf' weather station

as an example (local to AU) https://www.jaycar.com.au/mini-lcd-display-weather-station/p/XC0400

you don't have a country listed in your profile

 

This uses a magnetometer to get the direction the vane is pointing.
This uses a magnet and reed switches.
This uses LEDs/Photosensors and a gray code disk.

 

to be honest with you, unless its a learning curve, it would probably be more time/cost effective to buy an 'off the shelf' weather station

as an example (local to AU) https://www.jaycar.com.au/mini-lcd-display-weather-station/p/XC0400

you don't have a country listed in your profile

im from Malaysia and this for my FYP project :'D

 

This uses a magnetometer to get the direction the vane is pointing.
This uses a magnet and reed switches.
This uses LEDs/Photosensors and a gray code disk.

Thank you so much!!!!!!!!

 

In post # 5, Gray code, looked like it might be handy, but with conventional decoding to decimal I get strange results, 1, 2, 13, 18, 29, 28, 3, 4, 27, 26, 5, 6, 7, 8, 9, 10, 11, 12, 15, 16, 19, 20, 23, 24, 31, 25, , 22, 14. Lost 2 numbers . Found 17, & 30.

 

Yes, that's the way gray code works. Only one bit changes at a time so you don't get strange values at the change points which you would if you tried to code it in decimal. You could use a look up table to get the angle you need.