I haven’t seen it mentioned anywhare, but I would assume the Arduino Analog input can only read a positive voltage.
So what would be the best way to reverse the polarity on a analog signal from -5volts to 0 to a positive voltage of 0 to +5v so it can be read by an ADC?
I would search for it, but I am not sure what to search for, is there such a thing as an Analog flipflop? I feel I should know the answer to this, so I feel a bit silly asking the question. :-/