More about light (490)

1-06-1978 | This versatile traffic light controller should prove a welcome addition to model town, road or railway layouts, and could also be used a...

1-03-1978 | It is often the case that the first a motorist knows of a failure in one of his car lights is when his attention is drawn to the fact by...

1-02-1978 | This article describes an infra-red light source and detector, which can be used in a wide variety of applications ranging from intrud...

1-02-1978 | Light-emitting diode (LED) lamps are replacing incandescent filament lamps in a variety of indicator applications, as they offer improved...

1-12-1977 | The lightmeter described in this article utilises a silicon photo- diode, the most up-to-date method of light measurement, and may be used e...

1-07-1977 | This circuit is designed to give an audible and visible warning to the absent-minded motorist who forgets to switch off...

1-07-1977 | Circuits which use photosensitive devices such as LDRs, photodiodes or photo- transistors to sense rapid changes in light l...

1-04-1977 | Readers may remember that the `Discolights` featured in Elektor September 1975 used TTL shift registers to drive triac switches. This is...

1-03-1977 | Contributors to Elektor and the design staff in Elektor laboratories appear to be co-operating to create difficulties for our...

1-03-1977 | This simple circuit will doubtless find any number of applications in the modern home. It can be used to bore unwanted guests, to annoy...