More about light (490)

1-09-2005 | Solar powered lights are nowadays available at incredibly cheap prices, so we won't advise you to build these yourselves. But you may b...

1-07-2005 | This circuit can be used to check, for example, whether the door of a refrigerator has been properly closed. An LED sends out a beam of ligh...

1-04-2005 | Most cheap emergency flashing lights at fixed locations employ glass-based bulbs to generate light. The typical filament bulb is fragile, ha...

1-01-2005 | Here’s a recipe to make LEDs produce slow, continuous light effects rather than abrupt changes normally obtained from square-wave drive sign...

1-12-2004 | Model railway hobbyists who want to trigger train-controlled switching operations depending on the direction of travel often have things eas...

1-12-2004 | In the July/August 2004 issue we published a flickering light for use in models that uses a microcontroller to minimise the component count....

1-10-2004 | Although most digital cameras have a built-in flash, a connection for an external flashlight is rarely seen. Still, on some occasions it’s u...

1-09-2004 | As autumn approaches cyclists become more aware of safety and in particular their visibility to other road users. Dynamo lighting offers the...

1-07-2004 | It is often necessary in complex designs to provide a sequence of reset pulses to different parts of a circuit to ensure the whole design fu...

1-07-2004 | Light-sensitive sensors with characteristics similar to those of the human eye are most often implemented using photoresistors or special (a...