More about light (490)

1-07-1986 | Light-emitting diodes are perfectly suitable for dark-room light, because they (a) obviate the need of filters; (b) emit cold light; (c) hav...

1-07-1986 | courtesy light delay 87 Ever been groping about for the safety belt, ignition slot, choke con- trol or a map while in utter darkness and hap...

1-07-1986 | staircase light controller EE 119 July/August 1986 991 a piece of veroboard and fitted into an ABS mains wiring junction box, as a replaceme...

1-03-1986 | EE 64 March 1986 Light work for submarine cables by Kenneth Fitchew, British Telecom Research Laboratories, Martlesham Heath, Ipswich Submar...

1-01-1986 | INFRA-RED LIGHT SWITCH Anyone who has ever fried to switch the light on when entering a dark room with both hands full will appreciate this...

1-11-1985 | elektor electronics november 1985 by A Sevriens stage lightin Fig.1 Block diagram of the power stages: the shaded parts carry mains voltage....

1-10-1985 | stage lighting At this time of the year, thousands of amateur and school dramatic and music societies and groups are preparing for the comin...

1-07-1985 | elektor July/august 1985 The type UAA170 integrated circuit is normally used to drive up to sixteen LEDs, and the present circuit is no exce...

1-07-1985 | elektor july/august 1985 A bicycle or tricycle should, as everyone knows, be fitted with front and rear lights. The noteworthy aspect of the...

1-07-1985 | Infra-red light barriers enjoy great popularity as timing devices at sports venues, as detectors in alarm instal- lations, as optoelectronic...