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 ...

Dear James: We need more security that just the three floodlights we now have. I thought about getting some motion-sensing ones. How difficult is it to install these new lights myself? -- Elaine H.

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!

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