So Im currently using the arduino shield rev 3 with my arduino uno. I’m trying to get my 12v computer fans to run with my sim rig. My problem is when I connect the 12v ground to the shield the uno loses power.
I’ve checked the wires, everything is correct. Nothing is touching. It’s only when the ground is in the terminal, even if the 12v psu is unplugged the gnd shuts the uno down. My uno is powered via usb. Any help?
u/chiefakridge — 10 days ago