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Re: potentiometer typo?
Voltage dividers will work, but not perfectly. You need to put a series resistance in the ground side to offset the voltage so the OI can read the full range of values from the potentiometer. I think the lower limit of usable voltage into the OI is about 600 millivolts.
I apologize for not being more specific, but I never actually did this. I'm just remembering a discussion from some time last year.
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