At 02:26 PM 1/20/98 +0100, charley wrote: > >sure , use an ir laser at 36khz >detect it with a remote receiver >when you scan the whole area like a >sweep the system has to know >where it is pointing - if reflection >comes - bingo ! >one source is enough to get the angle . >two to get the exact location Interesting. Bewen thinking along similar lines, but couldn't find references. Could you point me towards some implementation data? BS