Tachometry, the measurement of the speed of spin of rotating objects, is a common application. Some of those objects, however, have quirky aspects that make them extra interesting, even scary. One ...

Sony’s new ZV-1 II vlogging camera has a wider lens and faster sensor The pint-size point-and-shoot packs a fast 18mm wide-angle zoom lens, touch controls, a new mic setup, and USB-C.