Re: Positive Ground

Posted by MarkB_MI on January 26, 2010 at 12:36:10 from (220.173.61.111):

In Reply to: Positive Ground posted by mss3020 on January 26, 2010 at 07:08:34:

This has been discussed to death many times before, and the answer is always the same: nobody really knows.

Electrical engineers today always "think" in terms that current travels from positive to negative. But in the past it was common to teach that current flows from negative to positive. This affects the way electrical circuits are designed. In a previous life, I worked with US Marine technicians on a certain weapons system. The US military school teach that current flows from negative to positive, and I found it very difficult to explain to the marines how a certain very simple diode logic circuit worked. I told them to ignore for a moment what they'd been taught and to assume current flows positive to negative. They immediately were able to comprehend the circuit, because the schematic made sense only when you used positive-to-negative current convention.

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