Power Line Interface
WIL REEDER email (remove spam text)
There is an X10 device called a TW23 power line interface (about $25) that
will give you access to the zero crossing for sending & receiving. I
recently saw a circuit using a opto isolator to pick-off the zero crossing;
this signal then could be used to gate your trans/ rec. The tw23 is a much
> From: Malcolm N. Haynes Jr. <CEW.WWIA.NET> malcolm
> To: MITVMA.MIT.EDUPICLIST
> Subject: Power Line Interface
> Date: Wednesday, September 30, 1998 6:10 AM
> My name Is Malcolm and I am working on a home automation project.
Currently I am building a transmitter to place X10 signals onto the 120VAC
60Hz house mains. The signal transmitted is a +5V/120kHz square wave. The
timing is on the zero crossings of the AC line. I need to block the 60Hz
signal from the output while allowing it to pass for the zero crossing and
power supply do you have any ideas.
> Thanks in advance for your help.
See also: www.piclist.com/techref/power.htm?key=power
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