Aaron Rasmussen and his brother Ezra built this awesome robotic sentry gun. The gun is an airsoft replica of an FN P90 and fires 6mm BBs. Pan and tilt are controlled by two hobby servos using a simple controller. Aaron wrote custom software to watch the usb webcam and track targets. There is a video on the site of it being tested… on Ezra.

This news article was written on September 23, 2005, quoting HackADay.