[ILUG-Social] Wireless proximity device

[Colin Whittaker]

Random thoughts on this.

How about a low power fm transmitter, stick an oscilator on its input,
then all you need on the mailfetching machine is either a card based fm
reciever or a really simple reciever circuit with its output into a
soundcard.
Then just see if your signal is there or not.


Colin

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