I am familiar with electronics but I am confused.
I want to make an Ohm-Meter with Arduino Due. I had previously made one with an arduino mega 1280 BUT, I have read that there is a danger of burning the Arduino Due if i apply an input voltage higher than [u]3.3v[/u] as an input. I have see many simple circuits and they are really simple, but they use 5v to pass from the Ref Resistor and the Unknown Resistor.
I do not understand if using the 5v will damage my Arduino due.
Questions are: 1. Should I use this circuit with 5v? 2. Should I use a different Ref resistor with 3.3v input to get equivalent results? 3. Help me understand when will I have a problem using 5v with Arduino Due.
Thank you for your time and sorry for my bad English grammar.