ProtoShield and Gnd Bus

Development Boards Arduino
1

Definitely a newbie question, so apologies. I have a circuit set up as the image shows. My question is—do i need to solder a trace to connect all of the GND connections in order to form a bus? Or is this already taken care of as part of the PCB (i.e., I can just solder another wire to the GND terminal on the shield)?

Thanks!

2

The schematic says they’re all connected together and also to the Arduino ground pin at the “power” header.

But why don’t you check with a ohmmeter and verify this. Shirley ( :smiley: ) you have an ohmmeter ?