Oscilloscopes measure current and voltage and, through the magic of mathematics, calculate power. Unfortunately, power comes in a large number of guises: instantaneous, real, apparent, and reactive.

This is what happens when you go to school for broadcasting, but end up in IT - you miss the basics. I know how to splice reel-to-real tape, but figuring out how much power I need in my server closet ...

Transformer-derived topologies such as the flyback allow power supplies to easily create multiple output voltages by adding secondary windings to the transformer. This creates a situation where you ...

step-down transformers decrease the voltage. The transformer in the diagram above is a step-down transformer – there are fewer turns on the secondary coil than on the primary coil. Type of transformer ...

Many power supplies use hold-up capacitors to keep enough energy at the full-wave or bridge rectifier output to supply a load when the rectified voltage drops and rises again at the next half-cycle of ...