Re: Ground in DC circuits.

On Tue, 26 Jul 2005 09:23:26 -0700, Peter Bennett
<peterbb@xxxxxxxxxxxxxxx> wrote:

>The term "ground" is much misused in electricity and electronics.
>
>In some cases (AC power wiring and some radio antenna systems) it
>really does mean "a connection to the earth".
>
>However, in most cases, particularly with portable equipment, "ground"
>just means "the point in the circuit that the designer decided to call
>"zero volts". If the equipment is in a metal case, the case will
>usually be connected to the circuit ground, as will the shields on any
>connectors.

Things get really fun when using positive-ground power systems, e.g.
the -48V for radios and audio equipment systems.

--
Al Brennan

"If you only knew the magnificence of the 3, 6 and 9,
then you would have a key to the universe." Nicola Tesla
.