I used to go nuts building autoturrets in Garry's mod back in '08.
Now I get to do them in real life.
Check the final tests for more impressive strikes:    • Sentinel autoturret . Stereo vision ...  
This was for my final year engineering skripsie project at the University of Stellenbosch

These are the initial tests of the system and I'll upload more as I make improvements and iron out the kinks.

FEATURES:

Custom built belt driven servo mechanisms with an RL78G14 MCU and PIDN control loops.

Second order projectile interception gun laying algorithm.

Kalman filtered position estimation of target using HD stereo vision