Light emitting diodes known as led is basically a diode, which is an electronic device having 2 electrodes. the electron flows from cathode to anode in a single direction and hence the diode is also known as unidirectional device too. This electronics video tutorial provides a basic introduction into leds also known as light emitting diodes. it discusses the polarity of an led including h.
This is part of a series of videos about basic electronics. this video shows how to calculate the correct resistor for leds using ohms law. and a few things. Leds (that's "ell ee dees") are a particular type of diode that convert electrical energy into light. in fact, led stands for "light emitting diode." (it does what it says on the tin!) and this is reflected in the similarity between the diode and led schematic symbols: in short, leds are like tiny lightbulbs. Kelvin is the unit of measurement for color temperature (k). leds can emit light in various color temperatures. it can range from warm white (2700k–3000k) to cool white (5000k–6500k). a slower color temperature value indicates a warmer (yellowish) light. at the same time, a higher one indicates a cooler (bluish) light. Battery connected across the p n junction makes the diode forward biased, pushing electrons from the n type to the p type and pushing holes in the opposite direction. electrons and holes cross the junction and combine. photons (particles of light) are given off as the electrons and holes recombine. sponsored links.
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