I’ve spent the past few years tracking my sleep. I’ve used smart rings, watches, wristbands and even smart mattress covers. One thing that I learned early on is that most trackers don’t actively ...

Transmitting analog video via photons is old hat: that’s how everything started, after all, back in the day with over-the-air TV. Up the frequency of those photons from radio to visible ...

However you make a digital computer, you need something to represent a binary digit. Usually this is some form of switch: a ...