Ever since the early web, people have been streaming video with inexpensive webcams, and since the advent of the Raspberry Pi and its dedicated camera slot we’ve really seen how easy it can be to build security cameras or any other webcam and get it online quickly. But these cameras notably lack defensive capabilities if anyone tries to break into an area they shouldn’t be, and [John] added some features to this webcam to help defend his garage.

The webcam itself is a custom build, mounted on a custom-built tilt-and-pan mount that lets it freely rotate to view any location in the garage. Some custom software running on a Raspberry Pi lets it operate in autonomous mode or be controlled manually from an Android tablet. But for the defensive capabilities, it also carries a Nerf machine gun with a laser sight and spotlights which can all be controlled autonomously by the Raspberry Pi, including a computer vision system that lets it track various objects. While this is mostly a fun novelty for his security camera, the noise it makes might be enough to startle any would-be burglar.

[John] added a few other features to this build as well, including a speaker, which allows the system to be voice-controlled and to communicate back to the user. This lets him activate and deactivate the system using a verbal password. These types of Nerf guns are fairly popular for turrets as well, and some have practical uses as well like keeping cats from walking on the kitchen counters.

自早期互联网以来，人们就一直使用廉价的网络摄像头进行视频流传输。自从树莓派及其专用摄像头接口问世后，我们真正见识到构建安全摄像头或其他网络摄像头并快速上线是多么容易。但这些摄像头明显缺乏防御能力，如果有人试图闯入不该进入的区域，[John] 为这款网络摄像头添加了一些功能来保卫他的车库。

这款网络摄像头本身是定制的，安装在一个自制的俯仰和旋转支架上，可以自由旋转查看车库的任何位置。运行在树莓派上的一些定制软件使其能够自主运行，或通过安卓平板手动控制。至于防御能力，它还配备了一把带激光瞄准器的Nerf机枪和聚光灯，这些都可以由树莓派自主控制，包括一套能够追踪各种物体的计算机视觉系统。虽然这主要是他安全摄像头的一个趣味新功能，但它发出的噪声可能足以吓跑任何潜在的窃贼。

[John] 还为这个项目添加了其他一些功能，包括一个扬声器，使系统能够通过语音控制并与用户进行通信。这使他能够通过口头密码激活和停用系统。这种类型的Nerf枪在炮塔装置中也相当受欢迎，而且有些还具有实际用途，比如阻止猫咪跳上厨房台面。