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Digital circuit question

BertMan
in Engineering

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I am interfacing a pic microcontroller with an electronic compass module via spi interface. The problem is the pic outputs at 5v and the compass will only handle 3v. I am thinking voltage divider for any inputs to the compass and an opamp for outputs. What is the best way to drop and increase voltage in digital circuits?

A D.Pair or comparator like you said.

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