Using voice commands via the Amazon Echo's Alexa voice assistant or your smartphone to turn on your Philips smart light bulbs is convenient, but even better is just walking into a room and ta-daa!

The motion sensor switch circuit can automatically turn on a water sprinkler but you can easily use it as a motion sensor light switch or motion activated alarm too. Before beginning the construction ...

Sean Hollister is a senior editor and founding member of The Verge who covers gadgets, games, and toys. He spent 15 years editing the likes of CNET, Gizmodo, and Engadget. I recently replaced most of ...