All items tagged with light and LED (96)

1-09-2008 | Having treated himself to a new bicycle fitted out with all mod cons including a shiny hub dynamo, the author was looking forward to many mi...

1-07-2008 | As we all know, LEDs are dimmed by altering the current flowing through them, not the voltage. We achieve this effect in this circuit by usi...

1-07-2008 | On my mountain bike I always used to have one of those well-known flashing LED lights from the highstreet shop. These often gave me trouble...

1-02-2008 | High-brightness LEDs are being used more and more widely in lighting applications. Here we present a simple ‘mood light’ using just a few co...

1-02-2008 | The availability of increasingly high-performance digital cameras and falling prices has encouraged a good many people to take an interest i...

1-02-2008 | The circuit described here, called ‘LEDBUS’ allows a practically unlimited number of LEDs to be controlled and up to ten lighting programs c...

1-12-2007 | LEDs are used more and more in motor vehicles, replacing the standard incandescent lamps because they are more energy efficient and have a m...

1-09-2007 | Elektor September 2007 comes with a board containing an LED booster circuit which you can try out for yourself. Although tiny, the board con...

1-07-2007 | Many robotic applications require a sensor to measure light levels. The conventional approach as shown in Figure 1 uses an A/D converter to...

1-01-2007 | This ingenious creation uses just eight blue LEDs to produce a scrolling text display with 360-degree all-round visibility. A more economica...