Rich was the editorial lead for CNET's Home and Wellness sections, based in Louisville, Kentucky. Before moving to Louisville in 2013, Rich ran CNET's desktop computer review section for 10 years in ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Jon Chase Jon Chase is an editor of smart-home coverage. For Wirecutter, he ...

May 2, 2013 Add as a preferred source on Google Add as a preferred source on Google If you've ever accidentally locked yourself out of a room in your home—as in, one of those push-button or ...

This simple code lock circuit described here is of an electronic combination lock for daily use. It responds only to the roght sequence of four digits that are keyed in remotely. If a wrong key is ...