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Which devices are used as indicators in a digital system?

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Which devices are used as indicators in a digital system?

(a) LCD

(b) LED

(c) Varactor diode

(d) Gunn diode

This question was posed to me by my school principal while I was bunking the class.

My question is taken from Power Controls in chapter Interfacing to the Analog World of Embedded Systems

1 Answer

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Best answer
The correct option is (b) LED

Easy explanation: The light emitting diodes are used as indicators in the digital system and can be directly driven from a logic output.

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