The third problem I started facing on my new Dell laptop was that now and then, despite using the AC power adapter or charger which came along with the ultrabook, I frequently got to see this message ...

Editor's Note: Here's another take on the transformerless AC line power supply, which finds use in some well-insulated, low-power devices. Our technical reviewer pointed out that C ac should be an ...

AC/DC power supply manufacturers have focused their latest designs on meeting the increased demand for higher efficiency and miniaturization in industrial and medical systems. A few of them are also ...