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Re: clock, data, and power on same line?

There are ocean-going systems that only use one wire. Plus the ocean, of course.

Reply to
Winfield
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The new PoE ethernet-cable-powered network

> devices are going to be pretty convenient.

PoE = Two pairs, minimum, right? = 4 conductors. USB = 4 conductors IEE1394 = 6 conductors (if power provided) POTS = 2 conductors minimum

1-wire = 2 conductors minimum, 3 used at times

Best regards, Spehro Pefhany

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"it\'s the network..."                          "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
Reply to
Spehro Pefhany

Spehro Pefhany wrote in news: snipped-for-privacy@4ax.com:

AFAIK, POE uses the other two pairs in an ethernet cable for power to the remote device (usually a wireless transciever).

Reply to
Gary Tait

There are two types. One uses spare pairs, the other superimposes a DC bias on the TX/RX pairs.

Reply to
DJ Delorie

Kind of bulky if you don't need it otherwise.

Best regards, Spehro Pefhany

--
"it\'s the network..."                          "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
Reply to
Spehro Pefhany

Le Wed, 22 Aug 2007 14:26:21 -0400, Spehro Pefhany a écrit:

I wonder how waves propagate in this transmission line and what ground current looks like.

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Thanks,
Fred.
Reply to
Fred Bartoli

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