Bob designed a standalone version of his Sentry Gun controller. The first version was built as a shield for the Arduino, while the new board has the shield’s hardware and an Arduino compatible MCU on the same board.
The Sentry Gun autonomously tracks, aims, and shoots at targets using a webcam, and servos connected to a computer via his board. The project is open source and all the design files are available. Check out a video explanation of the standalone board below.
Via Hacked Gadgets.