I guessing this thread will become the poster-child for how to ask =20
"complete", or at least "bullet-proof" questions. :)

Cheers,
-Neil.



Quoting Steve Smith <xygax@blueyonder.co.uk>:

> Tape measure !
>
>
> Sorry if I didn't somebody else would have...
>
> Steve
>
> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf =
Of
> PICdude
> Sent: 23 October 2010 18:28
> To: piclist@mit.edu
> Subject: [EE] Distance measurement?
>
> Other than ultrasonic (which is the bulk of the google results), what
> other technologies exist for relatively short (say <100ft) distance
> measurement?  It would be nice to use RF (as we'll have some wireless
> comms on the quad-copter), but my quick math tells me that I'd need to
> detect nanosecond differences to get ever 1-ft resolution.  Any
> thoughts on this?
>
> Thanks,
> -Neil.
>
>
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