A circuit diagram makes use of standardized symbols that represent electrical components or devices. It is easier to draw these symbols than drawing the actual pictures of the components. The actual components might change appearance as the electronics industry revises them or renders them obsolete. The diagrams describe the way in which the components are connected together electrically. There are drawn lines that represent wires or conductors between the appropriate connection points on the symbols; no particular type of wire or physical distance between components is implied; two components might be separated by a few inches or centimeters or a meter or feet.
The following examples translate from circuit diagrams to actually connecting components using the Wiring board. Note that the circuit diagrams are the universal way of representing circuits; books, on-line resources, and materials use them to communicate the circuit connections. They are very useful compared with pictorial diagrams of the connections. The circuit diagrams presented in the Wiring website will work with any other type of microcontroller.
Example 1: Connecting a Light-Emitting diode (LED)
Example 2: Connecting a pulse switch
Example 3: Connecting a Servo Motor
Example 4: Connecting a photoresistor
Example 5: Connecting a Hall sensor
Example 6: Connecting an infrared ranger sensor
Example 7: Connecting a potentiometer
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