A light diode is a semiconductor diode whose p-n transition illuminates under influence of current flowing in the conduction direction by emitting visible or invisible spectral light. Light diodes are also called glowing diodes or LED (Light emitting diode).
3-colour light diodes
RGB LED is a light diode consisting of 3 separate red (R), green (G) and blue (B) light diodes with a common cathode (-) or anode (+).
From the red, green and blue can get almost any other colour by changing their combinations and brightness, by changing current strength for each the colours between 0 and 20 mA.
Each colour must be used with a resistor, given that the red voltage drop is 2.0 V, but for green and blue 3.3 V.
The diode (from the Greek di twice + electrode) is an electronic semiconductor device (radio unit) with two outputs in which electric current flows in a single direction, consisting of a single electron-hole (p-n) transition. Also vacuum diodes (electron lamps) are distinguished, although the term "diode" nowadays refers to semiconductor diodes, since electron lamps as diodes are used very rarely nowadays. Therefore, this article also discusses semiconductor diodes; for vacuum diodes, see electron lamps. Also point diodes are distinguished, where a small area of semi-spherical p-n transition is formed, and the surface diodes, where the area of p and n is separated from one another by a relatively large flat border surface.
What is LED?
Led is a light-emitting diode with a built-in semiconductor circuit. The operating principle is based on a narrow-scale cold-light electric luminance that occurs at the power movement through the semiconductor circuit in the p-n electrical circuit. LED diodes are usually a narrow-angle light source, amplified by the shape of optical elements incorporated in the diode. Light emitted by the LED diode depends on the material used.
Why choose LED?
• LED is an economic light source, energy savings of 60%-95%
• LED diodes emit more light from one watt of electricity than daylight bulbs
• LED diodes are an environmentally friendly product because diodes do not contain harmful chemical compounds, diodes may be recycled
• LED bulbs heat minimally during use
• The useful life of the LED diode is 50,000 - 100,000 hours (incandescent light bulb - only1000 h)
• LED diodes can emit light in different colours. Diodes can also be made with interchangeable colour tones (RGB diodes).
• Unlike conventional lamps, the LED diodes do not change the colour (to yellowish) after a longer use, they become dimmer at the end of their lifespan.
• The intensity of switching on/off the LED lamp does not affect the quality of the diode
• LED diodes are not damaged by vibration or rapid movement
• LED bulbs are easy to replace because they are suitable for normal light fixture.