The X-10 devices perform poorly in more than a few installed. Each one drops the signal level a bit. High maintenance! John Ferrell W8CCW "My Competition is not my enemy" http://DixieNC.US ----- Original Message ----- From: "Hazelwood Lyle" To: "Microcontroller discussion list - Public." Sent: Tuesday, September 19, 2006 10:25 AM Subject: RE: [OT] Building a house - help me brainstorm! > > Maybe a bit "Geeky".. > > I always thought that Home automation would benefit greatly > from two-beam IR detectors across each doorway at about > waist-height. > > If you can detect direction of passage, you may be able to > estimate room occupancy, and then apply smarter controls to > lighting and HVAC zones.. > > But installing these after the fact, and wiring each doorjamb, > makes it much more difficult to do. > > In any case, have fun. That's a beautiful part of the country. > I understand they're building a water theme park in Dundee. > > Lyle > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist