Anemometer w/ Hall Effect Sensor

Note: Work in progress. Will change significantly over the next few weeks. Note that all STLs are in random orientations, not the suggested print orientation. When I have finalized design, I will orient them properly in the final revision.

Wind speed sensor for my Arduino weather station.

https://www.thingiverse.com/SeanTheITGuy/collections/arduino-weather-station

This is a low friction anemometer designed for use with an arduino based weather station. It is designed to work with a standard 22x8x7 skate bearing, and a bare(without arduino board) A3144 Hall Effect Sensor.

Hall Effect Sensor

22x8x7 608rs Bearings

5x2 Magnets

The sensor mounts in the base, printed side up, glued into place. Attach the 3 wires to the pins, either via solder or with dupont wires. The wires can then be passed into the bore of the base, and out the bottom, which is meant to be flush mounted on top of the box containing the rest of the electronics (images to come). I would then silicone or hot glue the wires in place, and around the wire through-hole to ensure no water gets into the brain box, and that the wires stay put. I would also suggest a gasket or other sealant where the flat flange mounts to the main box.

Depending on the quality of your bearings, there may be too much lateral play, which may facilitate the need for the optional spacer washer (stl included). If the magnets scuff on the sensor face, use the washer. If you don't need it, then you don't need it.

In the bearing retainer hub, there are three holes where 5x2mm neodymium magnets should be glued in place. These are what trigger the pulses on the Hall effect sensor, which is what gives the requisite data to the Arduino.

Three cups will be required. The cups should be glued into their receivers on the center hub so the cups will catch the wind. Orientation doesn't matter, as long as they all face the same way around the center axis.

Programming for this, as well as other weather related sensors (barometric pressure, temperature, humidity, wind direction) and a wind vector vane design will be forthcoming as it develops.

2019-03-26 Update: Included a wind direction vane in this design. Meant to function with a CJMCU-103 directional angle sensor.

CJMCU-103 Angle Sensor

This threads on to the top of the base, and wires from the sensor run through the base into the main box to be attached to the NodeMcu. Suggest applying grease to the required 22x8x7 bearing to increase the weatherproofing of this design.