eli5: ground vs negative terminal. are they the same thing?

Question

are they the words for the same thing? When we say ‘connect to ground’ does that mean the same as connect it to the negative terminal of the battery?

Or do we connect a ground pin TO the negative terminal of a battery. Such that if we have multiple devices, and we connect them to the same ground pin, all the current can sink into the negative terminal of the battery? As it should?

MAINLY IN REGARDS TO ARDUINOS.

In: 1

Answer 1

Negative ground is a choice. It’s pretty common in cars, but not at all common in other products.