AC line monitors measure the real-time quality of power delivered to a given load. These devices are diverse in capabilities, measurement accuracy and cost with systems ranging from simple, ...

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 ...

This file type includes high-resolution graphics and schematics when applicable. For applications such as motor control or power supplies, it’s often necessary to know whether the ac line is at 120 V ...