| A mains-slave unit has a master outlet and one or more slave outlets. The master outlet is connected permanently to the mains, but the s...
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| Same people are worried by the contarninarion of the environment by electric fields. A few even speak of 'electrosmog' and are even susp...
| Only a handful of components are needed to build an intrument which is indispensable in any RF workshop: the grid dip meter or 'dipper...
| In this article we give the answers to the letters of our readers.
| In most of the United Kingdom, we are assured of a stable 240 V mains supply voltage. In many other regions, including some parts of E...
| After last month's introductory instalment on the main features of the AF analyser system, which consists of a pe soundcard and some d...
| The mains voltage level is dangerous, and possibly lethal to touch, so that extreme caution is required whenever you work on wiring or com...
| The principle of the circuit is that on the basis of the current drawn by a mains-operated master equipment another appliance, the slave,...
| It is normally easy to tell when the mains voltage fails because then the radio stops playing or you are in the dark. Joking apart, compu...
| Microcontrollers are increasingly used for switching and control applications. Consequently, there is a growing need of inexpensive progra...