The author built a low-cost landing gear warning system for their aircraft using a lidar sensor and an Arduino microcontroller after a near-miss incident. The system uses a lidar sensor to measure ...

Continental’s ultrasonic back-up sensor kit is ready to retrofit on virtually any vehicle combination, including commercial vehicles and off-highway units. The unit offers an audible alarm when a ...

Whether you're renting a new place or sleeping at a home you've lived in for years, a nasty surprise waits at night: The sudden and irritating sound of your smoke alarm, waking everyone up for no ...

WHEN MY LANDLORD put a carbon-monoxide detector in my apartment 48 hours before the blizzard, I literally breathed a sigh of relief. The risk of carbon-monoxide poisoning is highest in colder weather, ...

One of the most common sounds in the modern world is the beep. From microwaves and cellphones to computers and backing-up trucks, this high-pitched alert pings us from every direction. But how is it ...