book collections email follower instructable user

How to Build Your Own Anemometer Using Reed Switches, Hall Effect Sensor and Some Scraps on Nodemcu. - Part 1 - Hardware

FeaturedContest Winner

Step 6: Mouting the Anemometer

Mounting the support

Take the 2 plastic lids and stick with instant glue. Drill 4 holes in the lids as shown in the diagram. Stick wooden or aluminum wands in each hole. Cut the 2 ping pong balls in the middle and stick each one on the extremities of the rods, all with the concave part for the same side. The approximate measurements are shown in the diagram.

Make a hole in the center of the CAP 2.5 cm with the diameter of the ball bearing. Use instant glue to stick it on the lid. Use baking soda as well very carefully.

Insert the aluminum tube into the ball bearing at a compatible height (see photo). If it is not properly adjusted, put a glue drop carefully.

Mounting the Hall Module

At the edge of the CAP, make a small hole in order to pass the head of the Hall sensor.

Glue the neodymium magnet to the side of the plastic caps according to the photo.

Use the 3 different colored wires to connect the sensor module.

Insert the Hall module and point the sensor facing the magnet at a distance of 2 to 4 mm. Test if the rotation of the shaft does not hit the magnet with the sensor.

Use a 3.7 V battery to test if the module responds to the approach of the magnet by turning the led to each contact. If the led turns on, everything is ok. If not, move the sensor closer to the magnet until the LED turns on.

If everything is ok, fix the module in the support using a glue drop.

Finally, the other end of the rod will be stuck in the plastic lid with instant glue and baking soda, adjusting the correct height.

Identifying the wires

Identify all the cables - VCC, GND, and Signal - to facilitate the connection with the nodemcu.