Hi guys! I’ve been building a weather station from scratch too (using a raspberry pi and python), and have found this thread great to read when I found it a few months ago. I can do a post about my station at some point if you’d like? I just have a few questions about final things that need to be done before the station can be considered finished.
Nick, I’m using the same wind speed (inspeed - though it's the 1 pulse per rotation one instead of the 8 pulse) and rainfall (rainwise) sensors as you, and you’ve said you’re using an RC filter on both of them, based on the diagram at this link
http://www.wetter-garching.de/howto.html, to remove noise. What I wanted to know is if you used all of the exact components in the diagram (470 ohm resistor, 1N4148 diode, 10 kohm resistor and 100nf capacitor) in the same setup, because in previous posts you have said that you just need to add a resistor and capacitor to remove the noise.
Also, did you use the same RC filter with the same component values for both rainfall and wind speed or does one have slightly different values?
One other thing: the diagram uses 5 volt power supply, but I’m using the 3.3 volt one on the pi, and was wondering if this would require any changes to the RC filter components?
Please forgive my detailed question. I don’t do very much electronics, so I always like to properly check that things are correct and will work before implementing them, as I know how easy it is to completely fry things.
Henry