please help me in this project!!!!!!!!!!

[faisy]

hello!!!!!!!!!
i want ot make a project in the alaram gets on when any object try to cross that specific area where the alaram is placed.

please send me its circuit diagram


with waiting to ur answer
good bye

 

[Someone Electro]

You cod do it whith an laser beam,an preshure bag...

An IR motion sensor cod also work it the object is warm or hot.