Circuit board design steps

The design of the circuit principle diagram：schematic drawing tools and all kinds of editing are necessary to get a correct and fine circuit principle diagram.
A network table:Network table is a bridge between
circuit design schematic diagram (SCH) and printed circuit board (PCB) design and it is the soul of the circuit board automatically.Network table can be obtained from the circuit principle diagram,and it can also be obtained from the printed circuit board.
The design of the printed circuit board:The design of the printed circuit board is mainly for PCB.In the process, we use the PCB design software to provide the power of implementation circuit board layout,and to complete tough job.

Draw up the simple circuit diagram.

1)After design drawing size PCB/Sch,Firstly we need to design part drawing,then to design drawing size.Drawing size is confirmed according to the scale and complexity of the circuit diagram.Setting the appropriate drawing size is the first step to design schematic diagram.

2)Set up the PCB/Sch design environment.That is including set lattice sizes and types、and the cursor type, etc.Most of the parameters can also use the system default values.

3)Rotating parts.User takes the parts from the parts library,according to the need of the circuit diagram,then  place them on drawings.He also defined even set the serial number and packaging of parts .

4)Wiring according to the schematic .We need to connect components in the drawings with electric wires and symbols,Using a variety of tools provided by the PCB/Sch.Then we can constitute a complete schematic diagram .

Matters needing attention:

A circuit board via brings about 10 pf capacitance effect,which introduce too much interference,for the high frequency circuit.So we should try to reduce the number hole when we are wiring.On the other hand,too much hole will lower circuit board
mechanical strength.