Question

Why are opto isolators normally used between the micro controllers and the ULN2803?

a.

to optimise the current

b.

to reduce the back emf

c.

to increase the current

d.

to increase the voltage

Posted under Computer Architecture

Answer: (b).to reduce the back emf

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Q. Why are opto isolators normally used between the micro controllers and the ULN2803?

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