How to find out which of the resistors R15-R18 are installed on the MKR Vidor 4000 board (see below)? For example, R15 or R16, R17 or R18.
You use your Ohmmeter to check the resistance between the processor pin and the +2v5 connection and the +3v3 connection. The one with infinite resistance is the one NOT connected.
How to check the processor pin with an Ohmmeter, if the pins are located on the bottom U1-1 (
)? I think it's a bug in the schematics. Information of the presence or absence of resistors R15-R18 should be in the text of schematics or datasheet.
But you don't know which option you have, do you?
You're right, I don't have a Vidor at all. I have before my eyes a schematics, in which the power +2V5 & +3V3 are shorted. I could look at the PCB file, but it's not on the arduino.cc site. It is possible that someone can look at the real board and tell what resistors R15-R18 are installed.