If you’ve got an existing smart home rig, motion sensors can be a useful addition to your setup. You can use them for all ...

The circuit is simple, economical, and built using easily sourced, budget-friendly components. True to form, the onboard test ...

We’re still not sure exactly how [connornishijima]’s motion detector works, though many readers offered plausible explanations in the comments the last time we covered it. It works well enough, though ...

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