As more people wake up to the fact that smartphones and sleep don't go well together, the best alarm clocks are popping up on more nightstands. Mornings are brutal enough without your phone shrieking ...

The circuit uses four coils instead of the usual two to extract energy from the battery. The circuit charges a large capacitor which provides the higher current pulses needed to drive the clock ...

These were chunky dual-in-line devices containing clock and non-volatile RAM chips, a crystal, and a lithium battery. The battery was good for about a decade, which was fine for most PCs of the ...