We do not know the legality of this project but there is some one spying=20 on us with a toy QUADCOPTER. It transmits the picture by WIFI. Is there some way to detect when a wifi signal comes into range and=20 possibly get a directional fix on it. With these things becoming more and more prevalent it would be a nice=20 product make to mess them up. Bob --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .