[sdiy] Another Newbie Power Supply question

[Scott Bernardi]

The 5v side uses a totally separate secondary on the transformer, so it
is "floating" with respect to the +/-12v side.  If you tie the 5v side's
-OUT to the +/-12v side's COM, the -OUT becomes GND, and the +OUT
becomes +5v with respect to that GND. You could just as easily tie the
+OUT to COM, and then you would get -5V on the -OUT terminal (with
respect to GND).

CHoaglin at aol.com wrote:

> In a message dated 11/20/2001 6:04:48 AM Pacific Standard Time,
> sbernardi at home.net writes:
>
>
>
>> Without the remote sensing, on the +/- 12v side you would tie
>> your +S, COM, and -S together for the "analog" ground, the -OUT and
>> -S
>> together for -12v, and +S and +12v together for +12v.
>
> I'm not sure I understand..If +S, COM, and -S are tied together, and
> then -OUT is tied to -S, doesn't the output to ground, ie. a short
> circuit?
>
> -Chris

--
Scott Bernardi
sbernardi at home.net