On 2006-07-14, Ernie Werbel wrote:

Ok so if I understand correctly all this it's not the way the electronic go
that's important it's the voltage potentials? So -12V to zero is the same
as zero to +12V?

same distance, same direction, only difference is the end points.

But then why do you need ground? It's justa voltage reference, right?

pretty much,

or does it serve some other purpose as a convenient connection point (less
wires if they go to the chassis)?

that too, especially in automobiles.

Bye.
Jasen