+(x)V and 0V

[simon]

Hi there,
on many electronic circuits i see +x amount and 0V what do i put in the 0v

ie i see a circuit with 12v+ and the other with 0v do i run a +12lead to the
+ and leave the 0v or do i put the - in there

my electronics teacher wasnt very clear

thanks alot

 

[Rheilly Phoull]

"simon" <i@i.com> wrote in message news:41ca8467_1@news.iprimus.com.au...

Hi there,
on many electronic circuits i see +x amount and 0V what do i put in the 0v

ie i see a circuit with 12v+ and the other with 0v do i run a +12lead to
the
+ and leave the 0v or do i put the - in there

my electronics teacher wasnt very clear

thanks alot


If it's a 'single' supply ie. a single plus voltage and a negative (like a

single battery cel) then connect as you say, if it's a 'dual' supply ie.
+12v, 0v, -12v then the common point or ground is usually the 0v and there
are two other lines, one is 12v positive to 0v or ground and the other -12v
to ground. This type of supply is used a lot with op amps etc.

--
Regards ..... Rheilly Phoull

 

[Fred Ferd]

"simon" <i@i.com> wrote in message news:41ca8467_1@news.iprimus.com.au...

Hi there,
on many electronic circuits i see +x amount and 0V what do i put in the 0v

ie i see a circuit with 12v+ and the other with 0v do i run a +12lead to
the + and leave the 0v or do i put the - in there

Ok, clearly you can work out where the +12v supply lead goes, so connect
that to the circuit at +12v.

The battery has + and - terminals. So we will say that + is +12v. Now the -
of the battery is negative compared to +. that is (Volts@minus minus
Volts@plus ) is negative. So that means the -ve of the battery is actually
0v or ground on the circuit.

If you have a + and - power supply, then you have +12v , 0 (which may or may
not be grounded) and -12v.


The difference between the +12 and 0 terminals on the power supply is 12
volts,
The difference between +12 and -12 terminals on the power supply is 24
volts.


Its important to remember that the +12 and -12 are only +12 and -12 relative
to the 0 terminal on an isolating power supply. (some power supplies may
have 0v connected to ground INTERNALLY, it its not isolated properly.)

If 0v is grounded, then the +12 and -12 are +12 volts and -12 volts
relative to ground and to the 0v terminal.

my electronics teacher wasnt very clear

thanks alot

 

[Nathan]

hi there thanks both for your help,
sorry i did not reply earlier i have been away

thank you
nathan
"Fred Ferd" <fred@ferd.com> wrote in message
news:41cd84aa@news.comindico.com.au...

"simon" <i@i.com> wrote in message news:41ca8467_1@news.iprimus.com.au...
Hi there,
on many electronic circuits i see +x amount and 0V what do i put in the
0v

ie i see a circuit with 12v+ and the other with 0v do i run a +12lead to
the + and leave the 0v or do i put the - in there

Ok, clearly you can work out where the +12v supply lead goes, so connect
that to the circuit at +12v.

The battery has + and - terminals. So we will say that + is +12v. Now
the - of the battery is negative compared to +. that is (Volts@minus
minus Volts@plus ) is negative. So that means the -ve of the battery is
actually 0v or ground on the circuit.

If you have a + and - power supply, then you have +12v , 0 (which may or
may not be grounded) and -12v.


The difference between the +12 and 0 terminals on the power supply is 12
volts,
The difference between +12 and -12 terminals on the power supply is 24
volts.


Its important to remember that the +12 and -12 are only +12 and -12
relative to the 0 terminal on an isolating power supply. (some power
supplies may have 0v connected to ground INTERNALLY, it its not isolated
properly.)

If 0v is grounded, then the +12 and -12 are +12 volts and -12 volts
relative to ground and to the 0v terminal.












my electronics teacher wasnt very clear

thanks alot