this block, we're going to an overview of the system unit and what's made off.
So when we talk about the system unit,
we're usually talking about the case or sometimes referred to as the chassis. The tower, the desktop. It's the box everything plugs into that sits on your desk. Er more often. Now, underneath your desk comes in various shapes, sizes and colors.
And then what plugs into the system case or the unit? Or the cases? The peripherals, which we have input devices such as your keyboard. Your mouth's other input devices could be a card reader for biometric treater,
scanner or the clicker for the slides. That would be an input device. Output devices are items such as your monitor on LCD or old fashioned C R T could also be a projector talking printer's layers of printer's ink jets speakers.
So it talked about the case or the system unit. And so with inside the case, we have things such as the motherboard of their system board and also on the system board Motherboard would be the CPI or the microprocessor, which is the brains of the computer. We would also have the Ram the memory
you'd have your drive. Such a sloppy drives, hard drives, optical drives
your power supply.
Honestly, what else could be in a case?
You'd also have your fans? Do you have any extra sound cards? That would also be some of that beast side The case. It's all the inner workings of the computer,
while the common peripheral connection types we have plugs,
which are what's actually inserted. So if we look at what we think of it like electricity terms, the plug is the part with the problems on it. And the poor is the part that you plug in the
plug into a lot of times. Computers. We don't use a plug report. Sometimes we'll say, Jack's, you'll hear the term network Jack. That would be something you're plugging and network cable into.
Um, also commonly referred to his connectors, which is Derek Term used to refer to a poorer plug. A lot times we talked about connectors, we say male and female, so the male side and most times would be the plug which you're plugged in, what's like in this case of the
electricity? So this would be the male end, and this would be the female, and
those terms are commonly used. When we talk about connectors
now we'll go over quite a few the most common external types of connections you'll see on a computer. And these would be what you'd see on the outside of the system case or the chassis.
We'll go over the mini Didn't connector USB, FireWire d be connectors R J in audio.
The mini didn't you don't see as often anymore.
The original din was used for keyboards, and Nelson was a a bigger version of the mini den. You won't see as often it look kind of similar. Les pins
The mini din is most often seen in is called also PS PS two. For keyboards and mice, it's a circular pin that looks just like this.
Usually you'll see it will be a green connector for the keyboard and, like a pink connector for a mouse. In those MPs to modern cases don't usually have peace to. Most will have us being out to connect your mice and mouse or your mice and keyboard
Romel sing keyboard.
Used be connectors are kind of become the universal connectors to replace all other one connector rule them all.
Um, they're hot swappable, so you don't have to restart the computer most of time. You can just plug it in, plug him out. You don't have to turn off the computer to plug it in
to have it be recognized unless it requires special drivers.
They're also a lot faster than all the other connectors that
we're gonna talk about, and that's why it's being replaced.
You usually see two ends to it,
so the two most common type right now are the Type A and the Type B, and this would be the end that would plug into
the computer. This I would plug into the computer, and this side would plug into
usually a peripheral itself so you'd see this would plug into maybe the back of a scanner, and this end would be what plugs into
the computer itself. On the computer side, it's always gonna look.
It's always gonna accept a connection like this. For us be. That's the key to remember this type A.
But the other injury possible so micro USB in many US be very commonly seen on mobile devices, so you have a mobile device cable to transfer or charge your phone over us. Be the
this end will be what goes into your device, your mobile device, but the other and will always look like this to go into
the back of the PC or the front of PC of depending on where the ports are,
you've become very popular, do their high speed, and they're getting faster.
1st 1 out was U. S B 1.1. It was 12
megabytes per second, and then USB two came along 35 which is still kind of the industry standard. In the last year or so, USB three is started making its way into the market.
That's 400 megabytes per second, and you can definitely see the difference
and speed when using them. So that's hard drive transfers anything like that.
Now the key, remember with USB three is you'll know it's used be three connector because
when we're dealing with are
our Taipei or even the others. When we're dealing with the USB connector, this part we use be blue somewhere, so either the outside of this part will be blue, the metal or this inside connection part will be blue, but
that's how you'll be able to help. It's USB three and also the part where plugs in onto the computer will usually be highlighted. Blew in some way now indicate your USB three LA times will also have ah deviation of SS for super speed.
That's another way to identify a USB three.
Almost all new devices will have us be three, and USB three is backwards compatible with USB two and one. So if you have a device, it's U. S B 1.1 or USB two. It'll work in the U. S. B three poor.
And if you have a diet advice that's USB three, you could still plug it into your speed to port. You're just not going to get the same kind of performance.
Which is another reason why USB has become very commonplace to replace most of the other ports. Include for keyboards, mouse printers, scanners.
They're almost all U. S. B. Now.
FireWire, um was idea, is ideal for streaming video.
It's the IEEE 13 94 standard, also hot swappable. It's very similar to SB came around, came out around the same time as us. Be too, so you could see the speed or comparable 35 megabytes,
50 megabytes per second.
FireWire was more common in more common video editing. It was also more common on the early
Apple products. The early iPods only came with a FireWire connections, and the FireWire connection was native on a lot of the Mac and Apple devices.
Ah, so your other. Some of the PCs had FireWire but wasn't common. And you?
I kind of don't see it much in the consumer market on either platform anymore. Most modern device don't come with it,
but this is what the connectors look for, and if you do see you notice so it looks similar to us be. You'll see here,
but it's completely open on the inside, and you'll note that you can see on here. It's a square end over here, so these air three square corners in this corner has a notch in it, and that's that's one of the best ways to recognize if it's if it's FireWire, and so I actually label on the back of the case. FireWire supposed to USB, which is gonna be a
BB connectors often referred to as de shell connectors because of their Shape d shape. These were our first. These are our first connectors
for peripheral. So back before us be in before PS two and we had our mini din who are dead. Everyone used some form of de shell. They're used for Cyril can a connector. So instead of networks, you'd use a cable that had
this kind of pin out of both ends to transfer data between computers, your mouse would use a connection like this
instead of PS to, uh,
one of the most common ones that most people prior remember for a D B connectors, your printer connectors,
parallel ports. Those were devi connectors.
You don't see them too often a lot of times now. If you want to be able to use a
D B connector, some that has a D B connector in a
modern computer, you have to get a USB two serial converter because almost your results and it's always gonna have just
You're probably most familiar with those because of your telephones and your network cables. Those are R J connectors are J 45 year network connectors are always gonna be a little bit thicker,
and R J 11 is when we're talking about telephone type connections that would go into a modem or you plug into a regular telephone.
Uh, they're about their significantly smaller than in thinner than the R J 45.
Are you A 45 from Network in 11 is for telephone.
Were motive intent for Peter?
And then we have audio connectors.
Many audio's the most common. You get your headphone jacks
It's the most common way to either put on headphones or on if we're talking about on a PC. You usually have
multiple connectors for doing a surround sound set up for your audio, where they'll be multiple
audio, Jax or having,
uh, dedicated Jack just for your headphones.