Last year, [Alvaro] built a laser turret robot for the DEFCONBOTs competition ... As you can imagine, you can actually build home-made galvanometers — but it’s really not that easy.

[All Parts Combined] has the solution for you, with a Kinect-based robotic sentry turret to keep them at bay. The system consists of a Microsoft Kinect V2 connected to a PC, which runs an app to ...