I have a project that requires sensing voltage over a range of -2 volts to +2 volts. The voltage will vary from + to - several times per second. I cannot find that the Arduino analog pins can sense any voltage outside the range of 0 to +5 volts. Is there any way to sense & measure negative voltage?Thanks to anyone who can help
Other option is to connect voltage divider (1:1) between input and +5V. Than negative -2 would be sensed as +1.5V, and +2V as 3.5V.