And this section, we will be discussing the concept of printed circuit boards, why do we need PCBs
and also the advantages of BCB technology, and then we will be discussing about the basic elements
that constitutes any printed circuit board.
And we will move to the software CAD tools or the computer aided design tools that we usually use for
PCB design of which is geek and which we are going to discuss in this course.
So let's get started.
Boy, why do we need PCs?
It always starts by a project or a product idea in your mind.
Then you will draw a schematic design for your project or for your idea and make your first prototype.
And it may be something like this on a breadboard.
And after running your tests and after verifying that the idea is working just fine now, you will move
to a manufacturer and of course, you can deliver something like this to your customers.
So you'll need to manufacture your word back into these.
The electronic devices used it, obviously something like this.
If you had the chance to open up and all the TV or an old radio device, you may have seen something
like this.
There is no board at all.
Only the required components are soldered together in this manner, which is very difficult to manufacture,
very difficult to maintain, very difficult to upgrade.
And also it's very labor intensive.
It takes hours and hours of hard working and soldiering to produce a single unit.
So it was not a very efficient way to make an electronic device.
And by moving your project to a brutal board or a board like this one, it will look very clean from
the outside.
However, if you flip this board over to look at the bottom side, it may look something like this one
below with too much wires going all over the place, which is also very hard to manufacture, very hard
to maintain and very hard to upgrade.
However, it looks OK from the upside, but it doesn't solve our problems.
It I myself have been using brutal boards like this one for making development boards, which are a
microcontroller business like these boards or motor drivers like this one, and all of which have ended
up having cardboard from the bottom side because it looks very bad, looks very bad and messy with too
much wires going all over the place.
And also, it's not a very efficient way to make a product that you want to deliver to your customers.
And by moving to the printed circuit board technologies, it gives us the following advantages.
It saves too much space.
We can place too many components in a very small and tight space, which is amazing.
Number two, it's very quick to manufacture.
You can actually send your BCB design to any fab house and get hundreds and hundreds of your boards
fabricated each and every single day.
And the electronic components placement can be made by pick and place machines, which is an automated
process.
And that's really fast and requires less human intervention.
So you can deliver dozens and dozens of your products to meet the market needs each and every single
day.
It's much easier to develop and upgrade PCB design rather than a preferred design or whatever.
And also it's much easier to maintain.
You can make a multilayer PCB like this one in case you can't move the trucks to cross each other.
So you will be placing vials, which is a hole through the PCB itself, and it connects this truck to
another track on the bottom side of the board.
You can also control the layout of the of diabesity itself or that injects layer like this board, which
has the same layout for a PlayStation four controller and it has an RF radio module.
So it's basically and RF controller.
And just in case you don't have enough space to wear out your tracks, maybe two layers are not enough
for you like on this board.
So you can make a multilayered board that can be four layers or six layers of cover and all stacked
up together like shown in this diagram.
And the wires are connecting the tracks from any layer to another layer, which in turn saves a lot
of space and enable us to make some designs like this one, which is a multilayer board.
And it may look something like this from the top side.
And that's why we make PCBs in the first place.
And now let's move to the elements of PCB.