A recently posted Instructables DIY project lets you make your own exterior home security system that features lasers and an alarm that notifies you if someone is lurking outside of your house uninvited. Get step-by-step instructions, including a video and photographs, for constructing the 3D Printed Stealthy Dual Laser Perimeter Security Receiver. The 3D printed portion houses the electronic components and the entire system can be made for about $30. Check out more details in the full article: http://3dprint.com/77090/3d-printed-perimeter-security/


Below is a look at the system: