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A schematic diagram shows how each component connect with another. It is a simple and easy to read outline of the circuit. Each type of component has a unique symbol and a name(usually 1-2 letters). All relevent values and component specific information are usually included.
Below is an example of a schematic diagram:
As you can see, this diagram has 3 components: the thing with 4 horizontal lines, the triangle in a circle, and the thing with the wavy lines. Can you guess which is the battery? Yes, the 4 horizontal lines. The triangle in the circle represents the light emitting diode and the wavy lines represent the resistor -- both of which will be discussed in the components section. Note the "R1" next to the resistor symbol and "R1 470 ohm" below the diagram. This tells you what value to use for that component. If there was a second resistor, the second resistor will be called R2.
That's all it is to schematic diagrams. It's not that tough right?
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