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What are optoisolators?

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in Microcontroller by (14.6k points)
What are optoisolators?

(a) it is a driver

(b) it is a thing isolated from the entire world

(c) it is a device that can be used as an electromagnetic relay without a driver

(d) none of the mentioned

This question was posed to me in an online interview.

My question is from Interfacing with Motors in division 8051 Microcontroller of Microcontroller

1 Answer

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by (24.2k points)
Correct choice is (c) it is a device that can be used as an electromagnetic relay without a driver

Explanation: Optoisolators are devices that can be used as an electromagnetic relay without a driver. It usually consists of a led (transmitter) and a photoresistive receiver.

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