More about LED (794)

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 | Did it ever occur to you that an array of white LEDs can be used as a small lamp for the living room? If not, read on. LED lamps are availab...

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...

1-04-2004 | This circuit will need just a few micro-amps to make an LED flash. The energy comes from a home made ‘vegetarian’ battery.We have to admit t...

1-03-2004 | If you do not want your expensive R/C model to crash or disappear forever when the radio link fails or is subject to heavy interference, you...

1-02-2004 | You don’t need special ICs when a capacitive (or ‘touch’) switch can also be realised with an inexpensive PIC controller. This article shows...

1-02-2004 | The wide availability of low-cost switched mains sockets with radio remote control provides a simple way to control electrical equipment, li...

1-02-2004 | Although this month’s Mini Project is not exactly stunning from a technical point of view, there are a number of unusual sides to it, mainly...

1-01-2004 | LEDs have been around for years now but it’s only recently that things have started to get interesting with white and superbright versions a...

1-01-2004 | Everybody gambles sometimes, perhaps in a lottery or even in a casino. After all, who doesn’t dream of becoming rich without having to work...