I want to build an anemometer based on Hall-effect sensor, and now after three days I finally understood that wiring correctly the sensor improves vastly his reliability, so I can start working on the rest of the project.
And that's where I'm stuck: how to fix three axes on the hard disk rotative part ("palier" in French) that I plan to use?
Like this, I mean:
Note that the design shown here uses a computer fan, but I've been told that it's not frictionless, and a hard disk rotative part would be better (the author of this design notes that it's not reliable with slow wind).
There are screw holes on the top of the HDRP, but the difficulty is to keep the design as light as it can be, in order to be able to detect weak winds...