Tag: PCB Component

PCB Fabrication: Simple Guidelines For Creating The Schematic Diagram

PCB Fabrication: Simple Guidelines For Creating The Schematic Diagram

Printed Circuit BoardThe world has come a long way with technology, especially in terms of the advanced functions of modern electronic devices. This advanced technology can be credited to the presence of the printed circuit board (PCB). The PCB goes through a lot of processes before one can use it on various devices.

The first thing that manufacturers do during the PCB fabrication process is to determine the size of the device within which the PCB would be housed. This step is important because it determines the maximum allowable size that each PCB component could have and the size of the base board as well.

Manufacturers also take the following into consideration:

• Is it necessary to place the PCB onto a slot on the device?

• Is there any other component on the device that could possibly block the PCB? Some examples of this are the battery terminals that provide power to mobile devices or the various card slots on cellphones and digital cameras.
It is only possible to answer these questions by creating a schematic diagram before starting the process of PCB fabrication.

People who want to turn this into a hobby can take note of the following guidelines when creating the schematic diagram:

1.Make sure that the diagram provides clear references that are easy to read.
Clarity is actually the primary purpose of a schematic diagram and this is achievable by ensuring that the diagram uses clear reference designators for every drawing. Some of the standard reference designators that can be seen in almost every schematic include: BT (stands for Battery or Battery Terminal), PS (Power Supply), and S (Switch).
Many other abbreviations are used on schematic diagrams. The average Joe might view these letters and symbols as some sort of indecipherable alien code, but experienced electricians will have no trouble in deciphering it.

2.Clean up the placement of the text that corresponds to the symbols of the PCB’s component parts.
Some hobbyists make use of computer programs for creating schematic diagrams. These programs are great tools that help speed up PCB fabrication. However, some programs that place the text in a random disarray could make the entire diagram look disorganized. The fabricator’s job is to clean this up by placing the text in a relatively uniform location, such as placing it only to the right side of the symbol that it refers to.

3.Always use upper case letters to denote the names of symbols on the diagram.
This is especially true when there is a need to add notes in sentence form to the diagram. In this case, the fabricator would have to use lower case for the regular notes and then write the symbol names in upper case within the same sentence. This process adds to the clarity of the schematic diagram and ensures that PCB fabrication can proceed smoothly.

PCB

4.Make sure to label the junctions on the diagram with the correct symbol.
This means that the fabricators always have to use dots when denoting that the wires on the junction have to be interconnected.

Hobbyists who dabble with PCB fabrication always have to remember that the schematic diagram has to be neat and organized. This is not only beneficial in ensuring that the resulting PCB will not turn out into a sloppy mess; it also makes it easier for the hobbyist to seek (free) help or advice from experts.

Every person who reads the diagram, regardless if he is an expert or not, should be able to read it in one glance. The diagram has to be done in such a way that it will no longer have to be deciphered in detail since all details already speak for themselves.