That's a good start.
A "Net" is a software representation of the connectivity between component connection points. Schematic Capture software (like EasyEDA) uses nets to keep track of this connectivity. One of the outputs of a schematic that has been "captured" is a "netlist" that describes the connectivity contained in the schematic.
You don't have to worry about "keeping them in order". The software does that for you. The software assigns names to each net that follow a pattern recognized by the software. The net names usually look like this: N00032 or N00040 or N00105, etc., but you can rename a net with a more meaningful name if you wish. Sometime you might rename a net to represent a critical part of the wiring, like "VCC" for example, so its easily recognized later in the (PCB) design process ( this allows special handling, like track width for example).
There is a point during the design process where you have to stop and provide the "footprint" information for each physical part. The "footprint" is the physical representation of the PCB "PAD Layout" and physical space required for each part. The schematic symbol is a virtual representation of components (and its pins) contained in a physical part. The physical representation is associated to the schematic representation and follows it through to design completion. Much of this part association is already done in an existing library, but sometimes this needs to be done for non-existent parts.
When your schematic is completed and youve finished part association, you simply "forward" your schematic to the PCB design tool and all parts are placed on a virtual representaion of the PC board. Its your job as the designer to then move/place parts where you need them to be. If a part needs to be placed on the opposite side of the board, you actually place the part on the opposite side of the virtual PC Board. So....in short....what you have drawn on paper, and have shown in the photo, would actually be done on a virtual PC Board.
The design process goes something like this:
Design Requirements->Schematic (Circuit) Capture->Circuit Simulation->Bill Of Materials (physical part list)->PCB design->Mfg Outputs->PCB fabrication->Assembly->Test
There are usually multiple iterations of the process between Schematic capture and PCB design caused by design changes, and sometimes even processes between Schematic capture and Test.
I know all this sounds complicated but it is really not that hard. But it does take discipline.
Hope that helps...
Last edited: