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In Light Emitting Diodes when electron jumps from one state to another state it emits some energy in the form of light. And the light will be different for different type of semi conductor materials used for making for it.

So, in conclusion Light in LED is a result of output process.

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13y ago
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9y ago

An output device.

It primarily an output device, but can be either, depending on the application. If the intent is to produce light to indicate some function, then it is an output device. However, if the light is used to trigger some other function, then it is an input device.

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9y ago

It primarily an output device, but can be either, depending on the application. If the intent is to produce light to indicate some function, then it is an output device. However, if the light is used to trigger some other function, then it is an input device.

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9y ago

An output device.

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Q: Is a LED an input or output?
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