More about LED (792)

1-02-2007 | The display shown here employs an LDR which causes the LEDs to dim during the dark hours, and light at slowly increasing brightness with day...

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...

1-11-2006 | White LEDs have a forward voltage drop of around 3.6 V. If we wish to operate a white LED from a single 1.5 V dry cell or 1.2 V rechargeable...

1-11-2006 | The idea behind this project is a simple one. The power supplies for a (A)DSL modem and accompanying WLAN router can draw a total power of a...

1-07-2006 | Designs for audio amplifiers with DC coupling to the load are not often encountered these days, even though they offer definite advantages....

1-07-2006 | It is widely thought that light can be therapeutic for the human skin and soul. Light at the correct wavelength may also be effective agains...

1-07-2006 | An LED is sure to fail if the current through it is too high. You will soon discover this after you have blown a few up. A simple resistor i...

1-07-2006 | This circuit could be used (depending on your circumstances) by a gentleman to summon his butler, a manager his secretary or as in the autho...

1-07-2006 | If we wish to use a step-up switching regulator to run several LEDs from, for example, a 3 V battery, we find that the maximum usable mark-s...

1-07-2006 | Most PC enclosures provide only a single LED to indicate hard disk access, with the LED being connected to the motherboard via a two-pin con...