This presentation of Robo India is explaining the concept, theory and working principles of LED (Light Emitting Diode)
It also explain how to use them.
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3. • What is an LED ?
• LED stands for Light Emitting Diode
• It is a semiconductor light source
• Mostly it is used for indication
4. • LED have TWO legs normally known as
Anode and Cathode.
If you have forgotten
• ANODE is +ve terminal (Long leg)
• CATHODE is –ve terminal (Small Leg)
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8. As name suggest LED is also a diode and
when it is forward biased then electrons
are able to recombine with holes in
device, as a result it release energy in
form of photons
Phenomena – Electroluminescence
Color – Depend on energy of photon
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