Hi,
i'm new to this board and currently working on a project that injects an AC current into the board. I'm just wondering if the MKR1000 reads negative voltage levels at the ADC or does it even accept negative voltage levels at the first place?
I do not wish to damage my board in the process so it will be greatly appreciated if someone could give me some advice on this.
Thank you!
Simply don't do it !
You also neglect to include many details.
A schematic would be great ?
Voltage levels ? ( Peak to Peak etc)
If you set the incoming to an acceptable range and MAP that you could read either side of the mapped range to see a negative.
So lets say you set it to 3 Volts then that would be 1.5 volts either side of a mapped range.
You can then set the scale itself in the sketch to output numbers that are acceptable to your full range.
If your full range was actually plus or minus 10 volts then +1.5 would equal +10 and vice versa.
You might also want to google "read ac arduino" and swap to pictures to get an idea of how people are doing what you need to do.
You will see that most isolate the AC from the Arduino in some form.