Hello, I am unable to get a non-zero voltage measurement when probing directly on the 5V pin of my Arduino MKRZERO. However, when I plug the Arduino into a breadboard (the Arduino is mounted to header pins) I can get a 5V reading when I touch the multimeter leads to the breadboard.
I’ve heard other people mention this on the forum but haven’t come across a reason why. Does anyone know why a non-zero reading directly from the Arduino pins isn’t possible in this case? Am I missing something basic here?
Any help is much appreciated.
Pics of each setup and readings are below.
Hardware
MKRZERO with header pins
Breadboard
Multimeter set to 20V
There is no other hardware connected to Arduino or breadboard.
I guess there is a 1-to-1 connection between the pins you stick in the breadboard and the header on the top.. As you have a DMM i would check if there is close to zero ohms between pin and header...
BTW are those pins not too thick to stick in the header? (< 1mm)
Thank you for your reply! Yes, I do believe you are right and the pins are too thick to stick in the header.
When I wire from the female pins to another portion of the breadboard that has no connection to the Arduino header pins underneath, I do get a reading with the DMM.
Thank you for your help! This solved the mystery. I am able to get a reading by measuring from a lead coming from the pins.
As @TechGraphix said above, the leads from the DMM are too thick to get into the header.
