Holcomb Energy Systems:Breakthrough technology to the world

[Novus]

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[Novus]

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[Tarsier_79]

For a start, I wouldn't use relays. They are too wasteful.
Use a simple Fet circuit. You will have to protect it from back-EMF though.

[Jimboot]

Lota off topic post removed.

[rakarskiy]

The choice of the direction of the current opposite to the true one cannot be called anything but paradoxical, but the reasons for such a discrepancy can be explained if we trace the history of the development of electrical engineering.

The fact is that electric charges began to be studied long before electrons were discovered, so the nature of charge carriers in metals was still unknown.
The concept of positive and negative charge was introduced by the American scientist and politician Benjamin Franklin.
 
In his work "Experiments and Observations on Electricity" (1747), Franklin made an attempt to theoretically explain electrical phenomena. It was he who first made the most important assumption about the atomic, "granular" nature of electricity: "Electrical matter consists of particles that must be extremely small."

Franklin believed that a body that accumulates electricity becomes positively charged, while a body that loses electricity becomes negatively charged. When they are connected, an excess positive charge flows to where it is lacking, that is, to a negatively charged body (by analogy with communicating vessels).

These ideas about the motion of positive charges were widely spread in scientific circles and entered the textbooks of physics. And so it turned out that the actual direction of movement of electrons in the conductor is opposite to the accepted direction of the electric current.

After the discovery of the electron, scientists decided to leave everything as it is, since a lot of things would have to be changed (and not only in textbooks) if the true direction of the current was indicated. This is also due to the fact that the sign of the charge practically does not affect anything, as long as everyone uses the same convention.
The true direction of electron movement is used only when necessary to explain certain physical effects in semiconductor devices (diodes, transistors, thyristors, etc.).

For understanding the nature of EMF and designing electromechanical and electromagnetic devices, this knowledge is crucial.