| Although the acronym ‘LED’ has stood for ‘light-emitting diode’ since the 1960’s, LEDs have only recently started to emit significant amount...
More about LED (745)
| Here’s a playful yet educational application of a Freescale MC9S08 microcontroller. It continues from last month’s Attack of the SpYder arti...
| The light output that can be obtained using LEDs has increased by four or five orders of magnitude over the last couple of decades. What is...
| 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...
| This ingenious creation uses just eight blue LEDs to produce a scrolling text display with 360-degree all-round visibility. A more economica...
| 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...
| 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...
| 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...
| 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...
| 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...