All items tagged with Switch and main (17)

1-07-1997 | The delay is intended to switch on the mains to heavy loads gradually to ensure that the switch-on current remains within certain Iimits...

1-12-1996 | It is a frequent requirement in computer and audio systems that several units are switched on or off simultaneously. The simplest way of...

1-07-1991 | If you have a non-qwerty keyboard and would like to use this with your computer without having to reIearn where the deviating keys are, this...

1-04-1990 | It is an undeniable fact that electric and magnetic fields affect living organisms. How strong a field the human body can withstand withou...

1-07-1986 | C G Mangold 89 audio-controlled mains switch EE 110 July/August 1986 It is often useful for audio or video equipment to be switched off auto...

1-09-1984 | lamp saver elektor september 1984 Most incandescent bulbs have an estimated lifespan of about a thousand hours of brightness. The actual tim...

1-06-1982 | olid state relays elektor june 1982 — 6-57 solid state relaYs the modern method of switching mains Electronic relays have quite a lot of a...