Both conventional current flow and
electron flow are used by many textbooks. In fact, it makes no difference which
way the current is flowing around the circuit as long as the direction is used
consistently. The direction of current flow does not affect what the current
does within the circuit. Generally it is much easier to understand the
conventional current flow – positive to negative.
In electronic circuits, a current
source is a circuit element that provides a specified amount of current for
example, 1A, 5A 10 Amps etc, with the circuit symbol for a constant current
source given as a circle with an arrow inside indicating its direction.
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