This simple circuit indicates the amount of power that goes to a loudspeaker. The dual-color LED shows green at an applied power level of about 1 watt. At 1.5 watts it glows orange and above 3 watts ...

There will be many obstacles on the way to the promised single cable type USB-C utopia: new standards that aren’t backwards compatible; USB-C sockets that outwardly look the same, but aren’t ...

With the ever-rising cost of electricity, we’re all getting increasingly sensitive about how much power our computers, televisions, appliances and other doohickeys are using — not just when we’re ...