Anemometer

Not finished -
I will update the complete description later

Currently I use these bearings (low budget):
https://de.aliexpress.com/item/10pcs-lot-623ZZ-bearing-623-ZZ-3x10x4-Miniature-deep-groove-ball-bearing-623-2Z-ZZ-bearing/32725107555.html?spm=2114.13010608.0.0.WxNsOO

I just bought one ceramic for testing - now I got it and I recommend this bearing:
https://de.aliexpress.com/item/Free-shipping-623-2RS-623-hybrid-ceramic-deep-groove-ball-bearing-3x10x4mm/32642399616.html?spm=2114.13010608.0.0.cmzAXI

Angle sensor:
https://www.thingiverse.com/thing:2220629 (cheap but not tested)
POTI SINGLE-TURN 6639S-1-103 10 K 1 W (tested, 20€)
https://de.aliexpress.com/item/Full-Circle-No-Dead-Angle-12-Bit-Holzer-Angle-Sensor-0-360-Degree-0-5V-Output/32422949989.html?spm=a2g0x.search0104.3.1.zu5n9t&ws_ab_test=searchweb0_0,searchweb201602_1_10152_10065_10151_10068_10193_10194_10304_10307_10137_10060_10302_10155_10154_10056_10055_10054_10059_100031_10099_10103_10102_10101_10052_10053_1