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Home Made Alarm Systems?
screwBrinks! asks: "I would like to begin a new project to do during those long and boring weekends. I thought about creating an alarm system in my apartment which would be connected to my computer. Then, if there is any intrusion, it would page me or phone me. I also want to be able to see a live report from the web and some other goodies. I have no problem doing the software part, but I don't have much experience with building hardware. Have any of you ever built such a system? If so, what would be your recommendation? I know much of this may already exist prebuilt, but I really would like to make as much of it as I can, for fun. I have no problem against using prebuilt infrared detectors, prebuilt door contacts, and the like as long as they aren't X-10 products."
Go to an alarm company that supplies to trade, and have a look at what they supply. Most of the alarm's I have seen recently can easily be hooked up to computers (most of them even have software packages etc designed for them). Stuffing around making your own alarm is asking for trouble.. and your insurance company will not recognize it either.