A student in the University of South Florida Makecourse has created their own version of the Turret from ... re centred around an Arduino Uno connected to an ultrasonic sensor.

To supply targeting data for the launcher, an Arduino Uno uses an ultrasonic sensor pair mounted atop ... as a useful classroom demonstration of radar-like targeting techniques to a young audience.

Arduino enthusiasts that also enjoy Valves Portal game are sure to be interested in this fan made Portal Sentry Turret which is ... to an HC-SR04 ultrasonic sensor, and features motion ...