I should be putting it outside but I will do that at the new place. For now it has to be put away. Should run it over the winter to make sure it still works OK? It does not really go anywhere until the spring. Hopefully this winter will be mild but there will be storms and it is a bit of a thrill to see how strong the wind got the night before, for example. I have a great tall post to mount it on which is mostly in the clear. It is in the house's shadow but the wind almost never blows from that direction (usually from the NW here).
This was a very nice DIY project for me with wonderful instructions, software and personal help from Derek via email. His webpage isn't live any more but Chris' site has a very thorough review of Derek's device.
As I write this, I am having trouble getting the anemometer to talk to the computer thru COM1 via the RS232/USB adapter. When I spin the cups, the LEDs on the display track the movement so I can see it is responding correctly but I can't read it from the computer. It only "speaks" RS232 so I need to remember how to do that. I dropped the speed to 1200bps but that does not get it going. Update 10/27: I have it working now with a straight through RS232 cable. Not sure why the RS232/USB adapter does not like it.
I was a bit skeptical of my ability to make the cups out of ping-pong balls as Derek described but I got very respectable results by simply being careful with a very sharp blade. I did a couple trial runs to get a bit of practice. The ping-pong balls were inexpensive and available anywhere thus illustrating an important principle of DIY projects - that the materials should be readily available anywhere and cheap to obtain.
Derek had a great small kit of the circuit board and some of the special parts like the machined spindle and the disk but I am assuming that is no longer available. Derek had explained on his website when you could see it that he had sold the rights to the design to a business and that there were a limited number of the kits available.
Derek, if you are sailing out there somewhere and want to say hello, please write to me! This was a great project - thank you. Nicely done.