In industrial setups that use equipment such as induction motors, it is important to maintain the proper frequency because the motor’s speed is a function of the frequency. More elaborate and ...

Depending upon where in the world you live, AC mains frequency is either 50Hz or 60Hz, and that frequency is maintained accurately enough over time that it can be used as a time reference for a clock.

I just got the latest Hifi News magazine and, as usual, the same ridiculously expensive mains cables etc are being pimped. I usually just skim over that crap, after admiring how pretty it is, but this ...