Hi all, A while back I made a small data logger using Dallas temperature chips and a humidity sensor controlled by a 16F873. Now the person wants to measure "wind" velocity as well. However, the catch is that the wind, if you can call it that, is actually the small variations in air movement in an average ventilated room such as in an office. I haven't got a clue how to measure something like that. Any ideas :-) -- Best regards Tony mICros http://www.bubblesoftonline.com mailto:sales@bubblesoftonline.com -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu