Subject:
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sending signals over power lines
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 27 Dec 1996 17:05:13 GMT
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Original-From:
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Andrew S. McGeachie <strawberries-and-cream@atg./avoidspam/com>
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Viewed:
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1494 times
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hello. While this question doesn't pertain directly to the handyboard, I
thought I would post it here since I am using the handyboard in my project.
Some of you may have heard of this product: There are devices on the market
(radio shack and a few others sell them), that are used for controlling
appliances and lights remotely, and they work by sending signals over the ac
power lines in your house. That is, you plug a special controller unit into
an ordinary outlet in your house, and replace the things you want to control
(a light switch for example), with special funky light switches. The
controller box can then turn the light on and off by sending signals over
your house current, which the special light switch can receive and respond to.
Now what I am wondering, is how exactly is this done? How are the signals
encoded? Is AC required or can this be done over DC as well? I'm
interested in doing something similiar, just not with appliances and house
current.
Thanks for any help.
- andrew
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Message has 3 Replies:
 | | Re: sending signals over power lines
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| (...) There are a bunch of proposals along these lines (eia standards, and future standards) CeBus, LonWorks. X-10 is most prevelant, somewhat limited, and some of the stuff sold is of marginal quality, although some is really good. X-10 is what you (...) (28 years ago, 27-Dec-96, to lugnet.robotics.handyboard)
| | | Re: sending signals over power lines
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| (...) Whether the signal is traveling over AC or DC does not matter. What type of current is running through the wires is unimportant. What is important is that your electical wires *already run all over your house*. What these devices are (...) (28 years ago, 27-Dec-96, to lugnet.robotics.handyboard)
| | | Re: sending signals over power lines
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| (...) Andrew, I've putzed around a bit with the system you've discribed. Its called X-10 power line carrier transmission. (P.L.C.) The codes format was setup back in 1978 for Sears and Radio Shacks Plug 'n Power system. Since then X10 Powerhouse has (...) (28 years ago, 28-Dec-96, to lugnet.robotics.handyboard)
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