I have (2) 5VDC @ 1A switched floating ground (groundless) power supplies.
PSU #1 drives the Arduino via the round plug
PSU #2 drives a PC case fan (DC motor for all practical purposes)
I will be reading (3) analog voltages from external sensors. These sensors are using shielded cables to each (CAT7 cable).
Can I bring the Arduino ground, shield drains on the cables, and machine chassis to earth ground of my wall outlet to lower voltage fluctuation and increase stability?
I would imagine this would optimize the analog reads...