::I 'm quite afraid of using over-the-mains communications, and it's
:: complicated. Look for X10 circuits. There are sites with all the
:: circuitry. X10 only transmits during zero crossing to avoid the
:: interference on the line.

There are or were specialist chips for modemating over the mains 
network - I think Texas used to be one supplier.

Colin
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cdb, colin@btech-online.co.uk on 27/04/2009
 
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