Summary

This is the Wind direction sensor, part of my 3D printed Weather station project.

it uses 8 magnetic sensors (16 positions), a 5x3 mm round magnet and a PCF8574 port extender

https://www.youtube.com/watch?v=NDPbw3wCp9c
https://www.youtube.com/watch?v=qQQkd1V2QLk

Sensors holder - https://www.thingiverse.com/thing:2396650