Hi, I'm designing a board (A) that will communicate with another unknown micro (B). A runs on 3.3v, and I have managed to get hold of components that work with 3.3v. However B needs a wiper input between 0 and 5v, so I thought I'd use a digital pot. I've found one (DS1803-10) that may work. However…

mixing 3.3v, 5v and i2c

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