Re: Why positive ground?

Posted by txblu on November 04, 2004 at 06:11:32 from (199.46.199.232):

In Reply to: Re: Why positive ground? posted by T_Bone on November 03, 2004 at 11:17:57:

T Bone, you're great dude; really like the welding paradym as that is what it was all about. And yes I agree about the longer life as a result of the pos ground even though in those circuits, the current was twice what it is in the neg ground 12v circuits.

Thanks for the recognition, but I need to rearrange one comment. Having been educated in both electron flow electronics and hole flow electronics, I can see the reasoning for each.

In troubleshooting circuits, electron flow is the easiest to understand; like the Armed Services teaches. When you start designing electronic circuits, you start with a power supply and start hanging things off it. Iffin you're going to do that, to start from the positive (+) terminal of the PS and move out into the circuit, you gotta use words that will go along with that process.

So these brilliant whizbangs decided that if we talk about what happens when an electron moves INTO the positive terminal of the power supply, having been OMITTED FROM the PS neg (-)terminal and having gone thru the electrical components, we can talk flow from the + terminal.

So if electrons are being returned to the power supply via the pos terminal, the ABSENCE of electrons (i.e. the HOLE where one just left)is going out the pos terminal in the opposite direction.

So since colleges prepare engineers, and engineers design things, engineers are taught what the HOLE is doing, rather than what the electron did and hence positive conductance.

And sir, "that's the rest of the story" (Paul Harvey).

Best,

Mark

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