The way we control the speed of fan motors or pump motors has tremendously changed in the past two decades with the introduction of variable-frequency drives (VFDs), aka variable-frequency controllers ...

Why get up close and personal with a resistor when you can tweak it from a distance? Remote variable resistors make analog circuit control easier, neater, and a lot more fun. Well, we are about to ...

Add Yahoo as a preferred source to see more of our stories on Google. Metering boundaries rarely match those of plant processes. A single electrical meter often serves multiple production lines, as a ...