3.2 CIRCUIT DIAGRAMS

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Most of us will have seen a circuit diagram in the past, but there are some terms and conventions of importance when constructing and reading these diagrams.

Generally,

- we try to have positive voltages at the top, and sources on the left hand side.

- each device has input/output terminals that are connected to nodes (black dots). They may not be drawn for simple connections, but are implied.

- standard schematic symbols are available to reduce ambiguity.

- All components are labelled with variable names or values.

Consider the example,