a ultra sound transcerver with PIC should do the job. simple school project

On Feb 17, 2008 2:57 PM, Cedric Chang <cc@nope9.com> wrote:

> What would be lowest cost method of detecting
> a hand moving through a volume of space.
> Imagine a media center and you wave your hand
> in front of it to turn on illumination for all the buttons
> and knobs.  Interrupting a beam won't work since
> I don't want anything to extend beyond the amplifiers,
> cable box and stuff.  Room may be in nearly complete
> darkness.  Hand waving must occur within 6 inches of
> target.
>
>
> Cedric
>
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>



-- 

Best Regards
-----------------------
    cllow
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist