Anemometer w/ Hall Effect Sensor

cults3d

Note: Work in progress, significantly changing over the next few weeks. All STLs are in random orientations, not suggested print orientation. When finalized design is ready, it will be oriented properly in the final revision. Wind speed sensor for my Arduino weather station. https://www.thingiverse.com/SeanTheITGuy/collections/arduino-weather-station This low-friction anemometer is designed to work with a standard 22x8x7 skate bearing and a bare A3144 Hall Effect Sensor, connected to an arduino-based weather station. It's meant to capture precise data. Hall Effect Sensor 22x8x7 608rs Bearings 5x2 Magnets The sensor mounts in the base, printed side up, glued into place. Attach three wires to the pins, either via solder or dupont wires, and pass them through the bore of the base, out the bottom. This is meant to be flush mounted on top of the box containing the rest of the electronics. I would then silicone or hot glue the wires in place, around the wire through-hole, to ensure no water gets into the main box and that the wires stay put. A gasket or other sealant should also be applied where the flat flange mounts to the main box. Depending on the quality of your bearings, there may be too much lateral play, which requires an optional spacer washer (STL included). If the magnets scuff on the sensor face, use the washer; if not needed, then it's not required. In the bearing retainer hub, three holes are provided for 5x2mm neodymium magnets to be glued in place. These trigger pulses on the Hall effect sensor, giving the requisite data to the Arduino. Three cups will be necessary. The cups should be glued into their receivers on the center hub so they catch the wind. Orientation doesn't matter as long as all face the same way around the center axis. Programming for this and other weather-related sensors (barometric pressure, temperature, humidity, wind direction) and a wind vector vane design will follow as it develops. 2019-03-26 Update: A wind direction vane has been included in this design. It's meant to function with a CJMCU-103 directional angle sensor. CJMCU-103 Angle Sensor This threads on top of the base, and wires from the sensor run through the base into the main box to be attached to the NodeMcu. Applying grease to the required 22x8x7 bearing increases the weatherproofing of this design.