Guide to Light Emitting Diode (LED)

A Light Emitting Diode also called "LED" is basically a semi-conductor light source. An LED is turned ON by forward biasing the diode. When a diode is forward biased, the holes combine with electrons which causes the energy to release in the form of photos. The size of an average LED is around 1 millimeter square. An LED has many advantages over incandescent light. LED consumes less energy, lasts longer than ordinary bulbs, is smaller in size and is much more reliable. Image Credits: flickr.com

This guide includes articles related to the working of light emitting diode and its applications. The comparison of LED and LCD is also discussed.

Light Sensors in Robots

Have you ever wondered how a robot visualizes an object and then performs an action related to it? What is it in a robot that allows it to see and identify various objects?...

Applications of Solar Energy: Part-4: Solar Street Lights

The solar street lights work on the principle of the photovoltaic cell or solar cell. The solar cell converts solar energy to the electrical energy which is stored in the battery. The...

Light Sensors in Robots

Have you ever wondered how a robot visualizes an object and then performs an action related to it? What is it in a robot that allows it to see and identify various objects? Don't know the answers?...

Applications of Solar Energy: Part-4: Solar Street Lights

The solar street lights work on the principle of the photovoltaic cell or solar cell. The solar cell converts solar energy to the electrical energy which is stored in the battery. The solar lamp draws...

Quantum Dot Technology for Flat Screens and Mobile Devices

The production of thin-film panels using quantum dot nanotechnology can be accomplished using either contact printing, which offers very high resolutions, or solvent spin-casting techniques....

How Traffic Light Systems Work

Gone are the horse and buggy days. Nevertheless, the sad part is that we still do not notice the endless number of traffic signals. Who are the inventors of these signal lights? What makes a traffic...

How to Power 12 Volts Lights with Solar Panels at Your Home

The technology now exists to power 12 Volt lights with solar panels at your home. Modern Photovoltaic Panels are very efficient and can be easily mounted outside your home. The 12V lighting system...

Quantum Dot Technology for Flat Screens and Mobile Devices

The production of thin-film panels using quantum dot nanotechnology can be accomplished using either contact printing, which offers very high resolutions, or solvent spin-casting techniques...

How Traffic Light Systems Work

Gone are the horse and buggy days. Nevertheless, the sad part is that we still do not notice the endless number of traffic signals. Who are the inventors of these signal lights?...