[JT118]

I didn't any schematics or diagrams yet. The hall effect sensor I'm using is the Aleggro A1102EUA-T, just mounted inside of the FO anemometer in the path of the magnet, and fixed with some glue.

As we have to supply power to the sensor I decided to have separate cables for the anemometer and the vane. A very small board is used to join the signals from both and connect them to the WeatherDuino TX board.

R1 is just a 180 Ohm protection resistor, and R2 a 10K pull up resistor.
If the weather help, tomorrow I'm going to replace the FO anemometer that feeds my weather station, for this modified. I'm testing it with my test unit, since last three weeks, and it seems to work well.

The TX software needs a small change, as this modified anemometer, produces just one click per revolution instead of two, as the original FO.

Does anybody know about any possible good or bad effects, that a change from two to one click per revolution can do?

Should be OK, I recently modified some FO anemometers for some students to work on one click and they are OK. All Davis anemometers are one click. See attached photo.