This 5-minute circuit check uncovered a home wiring issue I had no idea about ...

Question: Our home is 40 years old. In my bedroom bath we have a four-way lamppost light fixture that holds four 60-watt bulbs. I was blow-drying my hair using a 1,500-watt dryer, and I heard a pop.

In the last decade or so, significant advances have been made in the design of industrial power supplies and dc-dc converters, from the materials and device levels to size and weight reduction, ...