Hi!
First of all tell me how much area an average PIR can detect. Can it detect outdoor sunny desert like area between range of 300m to 2km.
Second if i use radar option, i remember from my study time that radar resolution may not detect small size objects. Can any one have idea how much smaller object can be detected especially when it is moving.
Third! i think beam broken type option can be efficient if i use laser as a beam. it can travel few miles in straight line but i cannot use visible laser. Does any invisible laser diode exist?
Thanks!