The US versions do indeed work on 240V, once you have made the proper modifications to the power supply components. The data signal is sent almost immediately after the zero crossing, so the 50 / 60 Hz difference is not an issue. This could theoretically cause a problem, if your transmitter and reciver are on *different* phases, in which case the 60Hz module being run on 50Hz mains would see the data signal coming slighly later than what it would expect. But, I think the timing envelope is tolerent enough to handle this, as I have tried US modules on 240 V, 50 Hz, different phase installations succesfully. Regards, Anand Dhuru ----- Original Message ----- From: "Michael Rigby-Jones" To: Sent: Thursday, June 05, 2003 6:24 PM Subject: Re: [PIC]: Home Automation with PICs > > -----Original Message----- > > From: Quentin [SMTP:qsc@IPTECH.CO.ZA] > > Sent: Thursday, June 05, 2003 12:53 PM > > To: PICLIST@MITVMA.MIT.EDU > > Subject: Re: [PIC]: Home Automation with PICs > > > > Keep in mind, Ruben, that X10 uses zero crossing for timing and > > datalength and the mains AC as carrier. Most X10 were designed for the > > US market which works on 60Hz and X10 will not work on 50Hz. > > > I'm fairly sure X10 works on either? I've certainly seen some modifications > for using US modules on 240v in the UK and all the mods related to the > voltage change. > > Mike > > > ======================================================================= > This e-mail is intended for the person it is addressed to only. The > information contained in it may be confidential and/or protected by > law. If you are not the intended recipient of this message, you must > not make any use of this information, or copy or show it to any > person. Please contact us immediately to tell us that you have > received this e-mail, and return the original to us. Any use, > forwarding, printing or copying of this message is strictly prohibited. > No part of this message can be considered a request for goods or > services. > ======================================================================= > Any questions about Bookham's E-Mail service should be directed to postmaster@bookham.com. > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu