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By Timothy Budd

Budd's creation to Smalltalk programming and the Little Smalltalk interpreter makes a speciality of user-friendly, instead of complicated subject matters of object-oriented programming. The Little Smalltalk method runs below the UNIX working procedure and will be performed on traditional terminals.

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A little Smalltalk

Budd's advent to Smalltalk programming and the Little Smalltalk interpreter makes a speciality of common, instead of complicated issues of object-oriented programming. The Little Smalltalk approach runs lower than the UNIX working procedure and will be accomplished on traditional terminals.

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Free electrons tend to move through conductors with some degree of friction, or opposition to motion. This opposition to motion is more properly called resistance. The amount of current in a circuit depends on the amount of voltage available to motivate the electrons, and also the amount of resistance in the circuit to oppose electron flow. Just like voltage, resistance is a quantity relative between two points. For this reason, the quantities of voltage and resistance are often stated as being ”between” or ”across” two points in a circuit.

RESISTANCE 23 When electrons move against the opposition of resistance, ”friction” is generated. Just like mechanical friction, the friction produced by electrons flowing against a resistance manifests itself in the form of heat. The concentrated resistance of a lamp’s filament results in a relatively large amount of heat energy dissipated at that filament. This heat energy is enough to cause the filament to glow white-hot, producing light, whereas the wires connecting the lamp to the battery (which have much lower resistance) hardly even get warm while conducting the same amount of current.

Ironically, this was not my first choice. I found it much easier when I was first learning electronics to use conventional flow notation, primarily because of the directions of semiconductor device symbol arrows. Later, when I began my first formal training in electronics, my instructor insisted on using electron flow notation in his lectures. In fact, he asked that we take our textbooks (which were illustrated using conventional flow notation) and use our pens to change the directions of all the current arrows so as to point the ”correct” way!

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