Sandman
In article <a394t9l37s730gnv0o1t17lbk09lhnhlov@4ax.com>, Eric Stevens wrote:

Whisky-dave
The battery is not a PSU either,

Sandman
Whisky-dave: A battery can be said to be suplying power to the device.

Eric Stevens
Sandman: Supplying power != Power supply. Then again, it was Eric's claim initially, and he is a laymen so it isn't odd that he would mix these things up.

Apart from the fact that I probably have had a far better technical education in these matters than have you

Sandman
Haha, you're a hoot!

Eric Stevens
Well, I do have a degree in engineering which, although it was in mechanical engineering, .

Sandman
It's not like your word is worth anything here, Eric. You're a proven liar, remember?

Eric Stevens
and that I have spent more time fiddling with electrical and electronic devices than you have been alive, I would not be so foolish as to claim that a device which supplies power is not a power supply. I don't know why you persist in this inanity.

Sandman
See what I mean? This reminds you of your "black box" laymen analogy of the word "protocol". When you don't understand how things work, you use the simplest words. It's akin to you saying "Eh, it does stuff, and then voila, power". :-D

Eric Stevens
That you have not yet understood the 'black box' concept is telling.

Sandman
I understand it fully and how you have to use it because you don't understand what is being discussed. It's common among laymen to try to simplify things they don't understand, it's not you. But only you would simplify things and then argue with the people that knows more about it than you.

A PSU never has any power. A PSU has a power input and a power output. It never has any power of its own.

Eric Stevens
A Power Supply Unit never has any power.

Sandman
Correct.

Eric Stevens
I can just see you plugging your car into the electrical main supply to enable you to start it. Either that or you get the local kids to give it a push.

Sandman
A battery is a power *SOURCE*, just as your wall socket is a power *SOURCE* (or rather, the power plant that produces the power). A PSU takes power from a power source and regulates it for the load. It does not - I repeat - it does not have any power on its own.

Eric Stevens
That's the Sandman definition.

Sandman
No, it's the actual definition.

<http://en.wikipedia.org/wiki/Power_supply>

"A power supply is an electronic device that supplies electric energy to an electrical load. The primary function of a power supply is to convert one form of electrical energy to another and, as a result, power supplies are sometimes referred to as electric power converters."

Will Eric argue for days more or just quietly ignore this thread?

"All power supplies have a power input, which receives energy from the energy source, and a power output that delivers energy to the load"

Whoa, would you look at that - that's pretty much verbatim what I just said.

A PSU, or power supply, ...

sits *between* the power *source* and the power *target*.

You're way out of your league here. If you want to think a battery is a PSU, go right ahead while I'll laugh my ass off.

Eric Stevens
I hope we get to see a photograph.

Sandman
<http://z0r.de/1877>