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Fire and Ice

Is this Edward playing in the garage for the day or is it Jethro at work in the Asylum?

mad-scientist-brain-surgery.jpg
 
There's also a movie where the lead character gets ice from fire. Anyone know that one (name of movie, lead star)? No Googling, goes without saying.

HINT: The Force was not with him, but ingenuity was.
 
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Edward said:
DC current flows from positive to negative. AC current flows from positive to ground, but changes polarity 120 times per second (60 hz).
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DC unless rectified can move in either direction.ie welders will use dcep,or dcen.
 
Edward said:
DC current flows from positive to negative. AC current flows from positive to ground, but changes polarity 120 times per second (60 hz).
Click to expand...

jasonc said:
DC unless rectified can move in either direction.ie welders will use dcep,or dcen.
Click to expand...
Actually the DC current from a battery (the kind most of us are familiar with) flows from negative to positive. The terms originally come from which terminal of a battery the current leaves from the battery (the negative terminal) and which terminal the current enters the battery through (the positive terminal).
 
Obadiah said:
Actually the DC current from a battery (the kind most of us are familiar with) flows from negative to positive. The terms originally come from which terminal of a battery the current leaves from the battery (the negative terminal) and which terminal the current enters the battery through (the positive terminal).
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It's can run reverse.I know welders can weld either way.you are aware of batteries in series where voltage is increased by connecting positive to negative.
 
jasonc said:
It's can run reverse.I know welders can weld either way.you are aware of batteries in series where voltage is increased by connecting positive to negative.
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Yes, it can run in reverse in certain situations such as reversing the leads in a DC arc welder as in your links. But that's simply reversing which of the items (the welding stick or the piece to be welded) is connected to which terminal on the welder. It doesn't actually reverse the current so it flows form positive to negative instead of negative to positive. But I was saying that the DC current most of us are most familiar with, that which comes from some form of a battery such as a car battery or a flashlight battery does not run in reverse, and it does not flow from positive to negative. It flows from negative to positive. Even in connecting batteries in series to increase voltage, the current still runs from negative to positive. The current leaving the negative post of battery one is fed into the positive post of battery two, effectively doubling the voltage leaving battery two at it's negative post. (Assuming both batteries are the same voltage.) Essentially your car battery is (internally) 6 batteries that each produce about 2.1 volts, all hooked together in series, negative poles to positive poles, producing about 12.6 volts when fully charged. But yet the current flows the same direction throughout the battery and never reverses. If it any of them ever reversed, it wouldn't work!
 
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Obadiah said:
Yes, it can run in reverse in certain specialized systems. I was saying that the DC current most of us are most familiar with, that which comes from some form of a battery such as a car battery or a flashlight battery does not run in reverse, and it does not flow from positive to negative. It flows from negative to positive. Even in connecting batteries in series to increase voltage, the current still runs from negative to positive. The current leaving the negative post of battery one is fed into the positive post of battery two, effectively doubling the voltage leaving battery two at it's negative post. (Assuming both batteries are the same voltage.) Essentially your car battery is (internally) 6 batteries that each produce about 2.1 volts, all hooked together in series, negative poles to positive poles, producing about 12.6 volts when fully charged. But yet the current flows the same direction throughout the battery and never reverses. If it didn't, it wouldn't work!
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Engines,that work on alternators or have motors have back feed protection.a starter,window motor back feeds the system.any magnet uses in a motor or email magnet does that.DC is natural, ac is.unless it's chemical making the voltage
 
Car batteries use as electrons flow from negative to positive a positive ground system.
 
jasonc said:
Engines,that work on alternators or have motors have back feed protection.a starter,window motor back feeds the system.any magnet uses in a motor or email magnet does that.DC is natural, ac is.unless it's chemical making the voltage
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Ok, I'm really not understanding what you are talking about here? I've designed a lot of 12 volt RV and boat systems for people, and still don't know what you are talking about. I've never even heard of an email magnet or a motor "backfeeding" a system. I'm afraid all of that is above my level of knowledge.
 
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