How do you design printed circuit board?
If you want to know a printed circuit board is designed here is
the explanation in simple terms.
1. First you decide on the components which are in the
2. Need a software in which you can get symbols (both schematic
symbols and physical symbols) of standard components and which also
allows you to create your own symbols for new components which are
not in the standard tool library.
3. In schematic capture tool, you will use symbols of components
and also connect the pins of components with wire lines to complete
the schematic drawing. Based on complexity and size of the design
this can be few pages or hundreds of pages.
4. In the layout tool you will have to make a board outline
(based on the shape/size of PCB you want to design) and define
number of layers etc.
5. Schematics need to be exported to layout using the board
outline you designed. Result will be that all the physical symbols
will appear in the layout tool along with un-routed wire
6. Now you can place components on the PCB based on floor plan
(where you want to place what components) and start routing the
connections. Decide thickness of routes or traces based on
impedance and current these nets need to carry. Based on how many
layers have been defined and needed as per design traces can run
through multiple layers
7. When routing is complete, with help of tool you need to
create PCB fabrication data for PCB fabricator.
These are top level steps involved in a PCB design. There are
finer steps like back annotation (process to sync up layout and
schematics) which also important. Many tools give options for auto
placement, auto routing which can aid in the design. These used
with proper constraints and care can help speed up the design
process. Check for PCB tool vendor websites.
Proton led displays says:
Go to www.circuitboards.com scroll down to the links area and
click free cad software by cadsoft. My friend told me the other PCB
designing software mentioned makes you pay for there software if
you want it manufactured outside of there facility. Basically
locking you into there price or no price. Cadsoft is free up to a
certain layer count I believe.