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Technology Stocks : Echelon Corporation (ELON) -- Ignore unavailable to you. Want to Upgrade?

To: Roger A. Babb who wrote (1433)	3/15/2000 11:52:00 AM
From: Boplicity	Read Replies (1) \| Respond to of 3076

It depends on if they use AM as in amplitude modulation. How are they getting the information back to the utility is the question. And how will they do auto disconnects. better watch it you talking to guy who was taught how to design using vacuum tubes so I still remember what AM data transmitting is. You can run a lot information's as sideband on top of the 60 cycles LOL heck you can even do it at higher freq. much like they do xDSL and homenets over phone lines. <g> does that mean as it goes through all the transformers the signal gets bigger or smaller? that is a quiz for you... Greg

To: Roger A. Babb who wrote (1433)	3/15/2000 8:06:00 PM
From: unclewest	Read Replies (1) \| Respond to of 3076

The largest value for "smart" electricity use is created if power rates go high enough to make folks worry about such things. Unfortunately high power rates and much higher natural gas rates are probably in our future i agree, they probably are in our future... but, the future is "now" in europe and most of asia...where power is several times more expensive than here. some places in europe limit you to no more than 2kw at a time....sequencing appliances is the only way you can have a modern household. enter i-LON.

To: Roger A. Babb who wrote (1433)	3/19/2000 3:05:00 AM
From: KW Wingman	Read Replies (2) \| Respond to of 3076

A minute portion of the signal is coupled to the primary by the transformer action. If a very sensitive receiver is used, it is possible to receive the signal without an additional amplifier circuit. The CIA and KGB could do that 20 or 30 years ago so I don't see why is a big deal now. Doing it today at high speed is a different story. Moderate speed SB fine for many applications like meter reading. If that is not good enough for you, a simple, cheap electronics circuit could be placed at each transformer. The "signal" can be picked up from the secondary, amplified and coupled to the primary side. By using optical isolators on both sides, this circuit would maintain isolation of the primary and secondary sides of the transformer For example, this circuit could send the power meter reading to the utility company, no more meter reader. The cost of this circuit would be paid for in short order. <But it is for communications over the powerlines only WITHIN the house. The signals will not pass through the transformers to go further than that.>