Temperature logging system?

[Homercidal]

I have not yet. I had still planned on it, but now I bought a temp controller and will soon be getting a fridge, so I think the necessity of watching my temps will diminish greatly. When I was using the swamp cooler and ambient temps methods I was much more curious to see what happened during the day. Of course it may still be interesting to see the change in temps over as the yeast become less and less active.

 

[enderdsus7]

I built a fermentation controller and temp logger that dumps all my logged data to SD card early this year. I believe this is the sort of thing the OP is looking for. If I get ambitious, I can put a schematic up with my arduino source files on github for anyone to play with. I will note, that as the previous poster suggested, I lost interest in tracking brew temperature after just a couple brews. If there is interest in the source and a schematic, I can clean it up and post it, but there's really nothing fancy about my implementation if you already are comfortable using a micro-controller and analog temp sensors.