This Guy Built an Autonomous NERF Turret to Wake Himself Up
Sentry Gun | Role Play and Props | hobbyDB
John Park retrospective: Auto Nerf Sentry Gun @arduino @nerfnation @johnedgarpark « Adafruit Industries – Makers, hackers, artists, designers and engineers!
Foamland Security: Sibling-Proof Your Stuff With A Nerf Sentry Gun - Make: