Nice. I love weather station builds. Here is mine. I added a pm air quality sensor, a infrared rain sensor, some light sensors, a CO2 sensor, an accelerometer, and a loudness sensor. There's a spot for my Geiger counter too but that installation is not done yet.
This is cool. You might be interested in the synthetic sensor project - I don't think it ever got to commercial release, but the idea was to try and merge information from lots of different cheap sensors together into "virtual sensors". For example accelerometer + loudness sensor + pressure change could be combined into a "someone shut the door" sensor. Then you could make heirarchies of these virtual signals, e.g. "kettle on virtual sensor" + "morning" + "some IR signature" = "Alice is making breakfast" (rather than Bob). It's quite a neat idea, but as far as I know they never released any code for it.
I should technically solder more of this, as it's mostly together with prototype cables at the moment. Any soldering iron should work, but I am partial to Weller Soldering Stations. I have one from ~10 years ago that has an analog adjustment, though now I see they look to be mostly digital. Their website has them around $300 for some reason but they are on amazon for closer to $100 (which is what I got mine for).
Thanks for sharing this project. I have a lot of small individual sensors tracking mostly temperature and humidity in every room and outside (including one on my bike), and I'm always wanting to build a "complete" weather station, but lack the basis to build it upon. Yours looks cool.
Have you thought about adding some kind of room-temperature spectroscopy along with your Geiger counter? Might be interesting to correlate with spikes in the count rate.
Absolutely. That's part of why I'm delaying. A professor at the University of Michigan is working on a similar project and I want to catch up with her. They're using a cheap(ish) proportional counter to be able to identify all of the isotopes that you might be looking for in a variety of wartime or accident scenarios.
http://www.gierad.com/projects/supersensor/