On Mon, 5 May 2008 09:48:49 -0400, "Stormin Mormon"
wrote:

The benefit of providing DC for lighting, is that you can feed DC from both
ends of the wire.


AC should do this is wall as DC, it's just the phase (rather than
polarity) you have to pay attention to. I know I have seen circuits
with multiple AC sources connected together.

Of course transformer delivers AC, but I didn't feel like asking "does the
module containtaing a transformer have a rectification circuit, so that it
would provide DC, or is it simple secondary winding, providing 60 hertz AC
low voltage output"?

--
Christopher A. Young
Learn more about Jesus
www.lds.org
.


"CJT" wrote in message
...
Stormin Mormon wrote:
Do the transformers supply AC or DC for the 12 volt power?

That seems an odd way to pose such a question. A transformer without
more will _always_ provide AC. Provision of DC requires what I would
call a power supply, rather than a transformer.

Rarely would one go to the trouble to provide DC for lighting -- what's
the benefit?
--
Mark Lloyd
http://notstupid.laughingsquid.com

"Unlike biological evolution. 'intelligent design' is
not a genuine scientific theory and, therefore, has
no place in the curriculum of our nation's public
school classes." -- Ted Kennedy