Most installations involve some form of lightning protection system which is connected to an earth electrode.  The function of the earth electrode is to...

HTML supports a variety of entity symbols which can be entered using either numbers or an entity name.  The number or name is preceded by the ‘&’ sign...

Visitors who like to type web address rather then click menus may be interested in how our URL structure works.

A lot of our members work in countries where PPE (personal protective equipment) is regulated or they work for companies/organizations which take employee...

Electrical notes are a collaborative collection of electrical engineering information and educational material. Any registered user can add content. ...

Resistors are electronic components that oppose the flow of current.  Manufactured in various types and ranges they have a wide application to electronics...

We have a sister note to this (Robots - Interesting Video), in which I have posted some videos of interesting robots developed by commercial corporations...

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

Various techniques exist to enable the correct selection of batteries for UPS applications.  The procedure described below is one of the more common. ...

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.