Re: 12 volt power source?

On Fri, 21 Dec 2007 16:05:21 -0800, I said, "Pick a card, any card"
and David Nebenzahl <nobody@xxxxxxxxxxxxxxx> instead replied:

On 12/21/2007 3:37 PM Ray Haddad spake thus:

On Fri, 21 Dec 2007 23:55:37 +0100, I said, "Pick a card, any card"
and "Klaus D. Mikkelsen" <er.du.saa.klog@xxxxxxxxxxxxxxxx> instead
replied:

Ray Haddad skriver:

Multimeters don't apply much of a load by design. My claim was based
on a statement that the voltage on a 12 volt supply read more than
12 volts. Made by another poster, not me. I know for a fact, and
based on your experiences stated below, that this is common with
some poorly designed or special purpose power supplies. They rely on
the load to have full regulation. It saves the manufacturer money.

We totally agreee......

Shitty powersupplies depend on load, but regulated doesnt.

Most here seem to be hunting the cheapest of the cheap and probably
buy the wall wart type. More than half of those are only partially
regulated relying on the equipment on the load side to finish the
regulation. Awful practice, that, but it does make for cheap power
supplies when you need them.

I've taken apart lots of wall warts (to cannibalize the parts within)
and don't remember ever seeing any with a regulator. Just a transformer,
a bridge rectifier (or two diodes) and filter capacitor(s).

Your point?
--
Ray
.