Each electrical component can be represented
by a Standardized symbol.
Main standard electric symbols:
standard symbol for abulb
symbol for aconnection wire
symbol for an open switch
standard symbol for a closed switch
symbol for a battery
symbol for an electrical motor
symbol for a
symbol for adiode
symbol for aLED
Circuit diagrams are drawn using standard symbols and following
- 1) The diagram is drawn with a ruler and a pencil. Always begin by
tracing its general shape that is a rectangle.
- 2) The standard symbols of the different electric components are
located, preferably, in the middle of each side.
- 3) The order in which are placed the different symbols corresponds to
the order of connection of components in the circuit.
Example of diagramming
The goal is to draw the diagram of the following circuit:
We trace a rectangle with a ruler and apencil.
Each electrical component (battery, bulb and closed switch) is
represented by its standard symbol in the middle of a side.
We begins by choosing three locations that are delete:
Then are placed the three symbols:
Comment: It is not necessary to add connection wires that are
represented by the sides of the rectangle.
We check the order of connection. In the initial circuit, the positive
terminal of the battery is connected to the bulb which is itself
connected to the switch and the latter is connected to the negative
terminal of the battery.
This order is respected in the diagram.
Comment: as long as the connection order is respected symbol can be
placed on any side of the rectangle