We have had the Wiki with us for a long time now, but at last I have decided to say bye bye – more details on why below.

GE have put together a time-lapse video shown flight take-off and landings at some airports. An interesting view:

Many questions sent in to the site are in connection with motor starting and in particular star-delta.  For all but the simplest application, there is...

Lamps are the essential part of any luminaire. These are the light generating components. Since the advent of electrical lighting in the middle of the...

Exposure to time varying magnetic fields, from power frequencies to the gigahertz range can have harmful consequences.  A lot of research has been conducted...

Over the past year or so I've been involved in on going discussions related to referring fault levels from the secondary of a transformer to the primary...

From the earliest times, humans have found ways to create light. Pre-historic peoples used natural materials (moss, grass, etc.) soaked in animal fat and...

Using laser optical pulses the random number generator utilizes the time between arrival of random photos to generate the numbers, ensuring true accuracy...

Control theory looks at how systems work and are controlled from a mathematical view.  This note gives a brief introduction to some of the concepts – more...

In three phase systems, the use of transformers with three windings (or legs) per side is common.  These three windings are often connected in delta or...