I should have explained why I said that. If your storage is on an SD card constantly updating a log file can shorten the life of the card, though I guess just the one file a few times a day won't have much impact. Mine is stored on a RAID array on a server so it isn't an issue for me.
No, no resistance. I connected the fan to +5v and the collector, emitter to GND, GPIO pin to base. (I think that's right, got it the wrong way round when I first typed it.)
Hi Gary..just to let you know that I got the fan and connected and all is working fine..just playing with the min and max temperatures...just not sure if the fan got to be facing in or out..going to be screwed in the top cover...