All items tagged with LED and light (92)

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...

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

1-02-2008 | 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...

1-12-2007 | 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...

1-05-2006 | Commercial PCB exposure light boxes usually employ gas discharge tubes as an ultraviolet (UV) light source, these devices are however bulky,...

1-01-2006 | This design for a Christmas tree lighting system employs ten red light emitting diodes (LEDs) instead of the usual lamps. The LEDs are power...