Let me know someone in advance into my room, the best simple point, I want to stealth things, hoping to get on the door of the homemade alarm
This is very simple, with a personal body sensor on the OK
Close the door, in the door by the side of the handle nail nails, and then in the handle on the side of the wall nail one, do not crucify, half can, and then wrapped in a thin rope on the wall rope, rope ride to the door Of the nails, and then wrapped in a rope near the metal object on the cupboard, you're done, open the door, will affect the rope back pull, pull off the metal object, hit the ground, which issued a sound to remind you that the object from the nail The closer the better. I have a cabinet next door, done very sensitive, good conditions, but also from the door peeping, very practical
Oh, that is the alarm is not a siren, the alarm is commonly known as the siren, the police car installed
