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In this schematic, the battery,
switch and LED are connected so
the LED will light up when the

switch is turned on. Just spend a
minute looking at this schematic
until it makes sense to you. Then
try drawing one yourself of another
circuit you’ve built.

Note that the current flows from
the plus side of the battery to the
minus. That’s the way you’ll find it
written in textbooks. However, you
might find it written up somewhere
that the flow of electrons is in the
opposite direction... and that’s
true. However, the rest of the

world uses the plus-to-minus
convention. So remember: current
flows from plus to minus.

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