Thanks mate, but when I meant new to electronics, I meant that i started a few weeks ago. I understood most of it, but you lost me towards the end. I was looking for a bit more help, like a circuit diagram that I could follow or something.
The PIR looks like the thing I need. Thanks
P.S. I haven't really used microcontrollers before, except preprogrammed, put-it-where-it-tells-you ones. But I am always looking to learn more stuff. I have done alot of programming before, so if you would be kind enough to point me in the right direction, i could pick it up in a week or two i guess. I am a fast learner =)