Write two applications of i) LED ii) photodiode.

Write two applications of i) LED ii) photodiode.
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1 Answer

Answer :

LED: 

 1. In the opto- couplers.

 2. In the infrared remote controls.

 3. As indicators in various electronic circuits.

 4. In seven segment and alphanumeric displays.

 5. In optical switching applications.

 6. For image sensing circuits in picture phone.

 7. In burglar alarm system.

 Photodiode: 

 1. In the cameras for sensing the light intensity.

 2. In CD players.

 3. In the fiber optic receiver.

 4. As photo (light) detector.

 5. In light intensity meters.

 6. In the object counting system. 
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