I was looking for a sensor that could automatically detect falls to monitor the elderly. The first candidate that came to mind was a millimeter-wave radar sensor like the Aqara Presence Sensor FP2. It ...

Reaction wheels are useful things, typically used by satellites to keep themselves oriented the right way up in space. Turning the reaction wheel creates an equal and opposite torque in the spacecraft ...

Parallel processing is an idea that will be familiar to most readers. Few of you will not be reading this on a device with only one processor core, and quite a few of you will have experimented with ...

The childhood fantasy of a paper aeroplane that actually goes somewhere useful has been around as long as boring classroom windows. A YouTube creator who ...