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The turret is a simple remote-controlled airsoft gun.  Vertical and horizontal motion is powered by a pair of scavenged drill motors, the body is built from off-brand Lexan, the control computer is an arduino, the controller is a wireless Wii Nunchuk, and the gun is a cheap battery-powered uzi-style airsoft gun from the grocery store down the street.

We don't have detailed instructions on how to make it, as we sort of figured it out as we went and didn't keep notes, but if you look at the video below, you should be able to get a pretty good idea of the design, and we'd be happy to answer any questions about it that you have.  There's a bit more info on Steve's blog at and

Useful links:
The motor controller -
The arduino code -
The wireless nunchuk library -