->> i can't tie a cheap hygrometer using a hair to a computer ;)

 DW> Why not? Just buy one of those cheap hygrometers (which
 DW> usually use a kind of strip with paper glued to metal),
 DW> and hook a small potentiometer to it, so the resistance
 DW> will change with the humidity. Then digitize the signal
 DW> and feed it into your computer.

hummm... that's an interesting idea...

 DW> There are other possibilities, too, such as using a
 DW> solution of a deliquescent salt as your sensor. The
 DW> electrical conductance will vary with the humidity.

that's one that's a tad bit closer to "true science" ;)

)\/(ark