1-07-1992 | A neon tube cannot be dimmed as easily as an incandescent lamp because tbe tube can start only at a voltage much highert than the mains,...

1-07-1992 | When the Atari ST is provided with an external hard-disk drive, it has to be reset after about 15 seconds, as otberwise the drive is not...

1-07-1992 | Although newer types of solar cell have come to the fore recently, amorphous cells are bound to be with us for some time to come, mainly...

1-07-1992 | In most small solar power systems using a boiler it is required that the water circulation pump is not switched on until the temperature...

1-07-1992 | This Iittle circuit enables you to measure the so-called dynamic response of a d.c. power supply. A power MOSFET, T1, is used to switch...

1-07-1992 | Model aircraft tend to be realistic reproductions of the real thing. That means, among others, that starting the petrol engine must be d...

1-07-1992 | If a d.c. coupled output amplifier breaks down during operation, the loudspeakers, particularly the bass units, are at risk. The bass par...

1-07-1992 | The best known alternatives to a 'quick and dirty' power supply are tbe three-pin flxed voltage regulator and the zener-plus-transistor...

1-06-1992 | A small circuit is described that inverts a positive voltage into a negative one or doubles its level. It does not use inductors and is ba...

1-06-1992 | Print files, whether they contain text, graphics or both, seem to become larger and larger as the programs that output them, and the print...