Single-phase and 3-phase AC squirrel cage induction motors need some type of control circuit to initiate a start or stop function. The two types of ladder control circuits commonly used are the 2-wire ...

When you get the call, “The motor won’t start,” you’d best have a logical and systematic plan in place to approach the problem. “Easter egging” just doesn’t work unless you happen to be very lucky!

Many large telecom and datacom systems use multiple PCBs (printed-circuit boards) or blades that plug into a common backplane within a subrack enclosure. The backplane supplies the power—for example, ...

This is an extension of the previously published External Battery Charger Control (12V). It adapts the control for 6, 24 & 48VDC systems. Some of the differences are subtle so pay close attention. The ...