[edr1924]

Hi edr1924,

in the software of the TX module main tab beginning from line 100 you can find the different impulse <-> wind speed correlations of the different devices. Depending on which anemometer you want to emulate you can calculate a output frequency corresponding to your actual wind speed.

Best regards,
engolling

Thanks, yes I have to go that route, changing the WD software itself. 
I was hoping to make a Davis 6410 compatible 'plugin' converter but alas...

Hi edr1924,

I don't think you have to change the WeahterDuino TX Software. Your converter can just emulate the Output pulses of a davis anemomenter.
My idea would be:
- You converter determines the actual windspeed in m/s - from the comments in the TX Software you can calculate which frequency of pulses corresponds to the windspeed of e.g. a davis Anemometer.
Then you simple calculate back your frequency according to the actual windspeed and output it on a digital I/O.

You will have to be aware of the potential of the output depending on your voltage source of the converter you will have to use a galvanic isolation.

Regards,
engolling

Thanks again Engolling,  That was my goal but my math is not so good... It took me ages to make the Barograph part on my Gorgy Meteo Clock but at the end it did work so I have to dig in again...

So the convertor board has an output which has a small lag but that's no problem.