simon said:
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.
