Feasibility and hardware check

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hi all, excellent forum here doing lots of reading on once uno arrives weekend!

what i'm looking way open low voltage/amp closed circuit short time frame (~600ms on single wire ethernet). ideally i'd press "go" button pc cuts wire short accurate time frame reconnects it.

can uno or going need buy realy switch? not poe standard ethernet ive read voltage low below 3v hoping uno handle without if not else need order?

thanks need directing , figure rest out hope  :) 

db

the best solution depends on signal (data? power? uni/bidirectional?) wire carries.
an analogue switch ic 4066 might solution many scenarios.

lg, couka


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