Newly released video of a masked person on Nancy Guthrie’s doorstep in Arizona may contain leads that help investigators find her, policing experts said.

It looks like a cute little dolphin-themed toy, but don't be fooled—the Flipper Zero is a surprisingly powerful learning tool ...

Shortly after Nancy Guthrie disappeared, Pima County Sheriff Chris Nanos said that a camera affixed to her door had been disconnected, that she did not have a subscription that would have saved video, ...

A common sight in ‘smart homes’, door sensors allow you to detect whether a door is closed or open, enabling the triggering of specific events. Unfortunately, most solutions for these ...

Arduino test code is run to see if the sensors are working properly, with built-in LED flashing when the sensor is triggered, ...