I wonder a question. Let's say I use a circuit board in a project (the left hand side on image below, not the Verabod), and I want to solder a circuit on it.
Should I just lead those line connecting to GND to an empty circuit board track?
I just have a research online and I find out something. So, does it mean the circuit 1 is equal to circuit 2? Which all Ground is connected back to the negative pole of battery.