All items tagged with light and LED (96)

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...

1-10-2005 | Remote controlled light switches are becoming more and more common. DIY stores have inexpensive sets consisting of several light switches an...

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...

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

1-07-2004 | Physicians and repair engineers often use small light pens for visual examination purposes. Rugged and expensive as these pens may be, their...

1-09-2003 | In recent years the LED has seen many improvements so that we see them fitted in more and more situations where filament lamps were traditio...

1-04-2003 | A handful of high-intensity LEDs is sure to provide new accents in room lighting. In traffic lights and other signalling equipment, they sav...

1-11-2002 | You would be forgiven for thinking that a torch is probably the ultimate minimalist circuit: all you need is a battery, switch and bulb and...

1-07-2002 | If you need to drive a number of white LEDs to provide display backlighting or for a white-light torch what’s the best way to configure them...