[Robotgroup] Drive a Droid proposal... How to detect the "fence"?

[Vern Graner]

Bryan Bishop wrote:
> how about limiting the range of the controller? Put up a small
 > antennae in the center of the ring, wire in the controller to
 > that, limit the range to the 20 foot radius.

Interesting approach. hmmm. From a practical perspective, if the signal 
is weak enough to degrade after 10' or so, wouldn't it be weak enough to 
be "stepped on" by other RF signals? Cell Phones? 802.11 wireless? 
hand-held walkie talkies? I wonder how robust a solution it would be.

Might be worth a try experimenting with a very low power receiver / 
xmitter pair. Thanks for the idea! :)

Vern

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