I guess I never mentioned it, but no one will be surprised when I reveal that I am a stay at home dad. Some call it unemployed, since I'm a man, not a woman. Anyway, other than errands and such, I'm pretty much always at home. This is why I'm able to post so prolifically and at almost all hours (except for sleeping hours in the western USA ;-). I could also say that I'm "always at work", though even I don't really consider it work. Any employment I've had in the last 16 years has been working from home, as well. I'm on the lookout for a job these days, but it's slim pickins out there.
I don't know what TSOP means, either, but I know it's a kind of IR/light sensor. The additional sensor for Pit-Pro is a TSOP style sensor, I believe.