Even if (like me) you don't have the time and space in your life to construct one of these, just reading the article is enough to give you inspiration. It also gives you a 20-20 glimpse into the future. The idea is to hook up a camera to a $40 minicomputer called Raspberry Pi, take pictures of visitors, and then send them to the cloud where you'll apply Amazon Web Services (AWS) face-recognition technology to them. The expensive bit is the $50 Echo Dot, a hands-free, voice-controlled device that you use to control your device.
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