Re: [Staffslug] Ethernet over power lines.
On 28 January 2011 18:57, Kevanf1 <kevanf1(a)gmail.com> wrote:
> The idea goes back a lot father than that Kevan. I remember a
home
> automation system based around a Commodore 64 where the different
> components communicated over the mains. That would have been around 1986.
Wow! Seriously, I did not know the idea went back that far. you
have to admire the determination to get it working to an acceptable
level. A bit like home computing itself really :-)
I can beat that :) I used to have (and may still have, but I'm not at
home to check the bookshelves) a copy of this book, published in 1980:
http://isbndb.com/d/book/remote_control_projects.html
It includes circuits to control devices via the mains. There are two
approaches - apparently Maplin used to sell a pair of modules that
would send/receive several channels (analogue and digital).
Alternatively, it had a simple receiver and transmitter circuit that
you could build yourself. IIRC, the DIY circuits would only transmit
on/off commands, but they were much simpler and cheaper than the
commercially-built modules.
Russ
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