В Tell workplace pen thieves and pranksters how you really feel with a barrage of foam darts. This project hacks a Nerf gun to automatically fire at large heat signatures. Simply replace the toys trigger system with a servomotor, wire up a home security sensor, add an extended clip, and attach it all to a tripod. Anyone who steps into the sensors detection zone gets pelted with darts until they leave—or the clip runs out. Follow these instructions to deter would-be cubicle intruders.