I'm writing a highschool thesis on communication and a project we made with a raspberry pi.
We connected a relay to a raspberry pi and can controll it from our phone. The relay we use has to be connected to a 5v pin and a ground.
Now is my question:
Is the term ground correct? Because if the current flows from the 5v pin to the relay, it would need to return somewhere too, is this to the ground pin? Because if that is the case, the term ground wouldn't be correct?
A ground should be to avoid static electricity?
i have connected the 2 using female female jumper wires