Just a simple radar turret controller using two radars, a search radar and a tracking radar.
The search radar should be connected to whatever vehicle or contraption you have the turret connected to, and be set to spin. Either clockwise or counterclockwise works.
The tracking radar is the radar you put directly onto the turret, and have it set to static.
How it works is, at first, the search radar has control over your turrets, so when it gets a ping, the turrets move to look at the target. The tracking radar will then take over and, being static, will stay looking at the target until it is gone or the radar is deactivated.