He recently a posted 150 step build log for his fleece-covered Portal turret project. If you can get over the need to click-through 30 pages of steps, there’s a lot to like about this project.

Arduino aside, the turret is cheap and easy to build as [Andrew’s] writeup explains. The firing mechanism was constructed using a pair of foam wheels and motors, which is used to launch the ping ...

The sentry turret also has a charging port so you don't have to take it apart to replace the battery. A simple power switch lets you turn the device on and off. One of the hallmark traits of the ...