From using existing wiring to repurposing old hardware or smart devices, keeping your home secure might not cost as much as you think.

David Nield is a technology journalist from Manchester in the U.K. who has been writing about gadgets and apps for more than 20 years. He has a bachelor's degree in English Literature from Durham ...

We may receive a commission on purchases made from links. We've gone from big workstations being converted into protable laptops, and then into smartphones that we carry around in our pockets. We find ...