in this video, I will talk about the
berry pie is the crazy idea of a video
game developer named David Brabham
he wanted to build a small computer
for 50 since he's British
his primary objective to make it accessible to all, 
particularly for the teaching of computing, automation, and robotics in schools around the world. 
A tool for students who cannot afford to buy a computer, as well as those who cannot afford to buy a computer but can get their hands on old hardware like screens and keyboard 
keeping in mind that what needed to be new in high quality was the heart of the machine 
the motherboard and the processor 

I'll show you what a Raspberry Pi is? and what it can do?
I'll show you what a Raspberry Pi is? and what it can do?

when I tell you a Raspberry Pi is a
computer reduced to the minimum I do
mean the minimum because it's just a
contents of that small box when you open
it what you find inside is just aboard
on which we will find
most of the intern
you were presented in the sequence
where we showed you what was inside a
computer so this is the processor the
RAM
and here we have the various
communication ports
HDMI port which enables to connect to any television or computer screen
RCA video port also for televisions but for older generations tv model 

audio port on which you can plug your
headset the same one you use on your
phone and exactly the same kind of audio
jack
here two USB ports and here the Ethernet
port
network connection if needed 
to get it running we are missing a few
things to have a proper computer 

so I mean a screen, a keyboard  but also power supply a bit of memory which  will be provided by an external  hard drive
and that's what needed to connect all this 
So I'm going to go and get everything that's missing to make
a computer out of this.

I did my shopping and I have gathered
the missing components so I have a USB
keyboard a USB mouse going along with it
I have a screen
allowing the HDM format which is the format for the
raspberry here I have a Wi-Fi key that
will enable me to connect
the raspberry to the Wi-Fi network if I
had a newer raspberry version I wouldn't
need that key because in the latest
models the Wi-Fi is directly built-in
and because I need a memory
space so I retrieved this micro SD key
and SD adapter
which will fit in here
into the connector at the back of the
card
so before inserting this card into the
raspberry
there was a small task
I mean that to get the raspberry running
we need an operating system
recommended operating system for this
machine
is Linux a debain 
to retrieve that operating system
and install it directly in the memory
able to use the raspberry
pre-installed micro as DS
if you do retrieve the software if you
have another system on the internet and
install it on the card it is quite easy
to do and the matter is well documented
and available on the raspberry website
I'm going to plug in the various USB devices and at that point, I realized that I have three USB devices but only two USB ports, so if I had a newer raspberry  version I would have four USB ports but since that's not the case I'm going to use a USB multi-plug because it can lack the power to charge the USB devices  
which has another advantage the plugs are electrically powered well to have a keyboard running that's not very important but regarding the Wi-Fi key and the mouse that saves power for the raspberry
I plug  the keyboard the mouse and the WIFI key without forgetting anything   

here I have the screen but it is not  connected you have to plug it into the 
HDMI port now that everything is plugged  into the USB hub 
we need to connect to the USB port of the raspberry 


all I need now is the power supply
here is a smile five volts external
power supply
that will trigger the raspberry startup
automatically there you are it should
start now
so with this Raspberry Pi we managed to
start we find ourselves in a classical
linux working environment
we have access to a wide range of tools
we always find in other computers for
example we have an Internet navigator
we have a text editor
we have classic
code editing tools
we should also mention
the two languages are included in this
package one development environment is
the Python language the other is the
Wolfram Language is better known as
Mathematica that enables to do a wide
range of calculations and graphical
manipulations amongst others but what's
more that we don't find in a classical
computer but that we do find in the
Raspberry Pi is that we have access to
something I have not shown you until
now so I will show it to you now I'm
talking about that part the connectors
these connectors are called GPIO s
for general ports for input and output
those are small logical connectors
which you can read or write signals
Languages particularly Mathematica and
Python
we are going to be able to read what's
in these connectors and to write on
these connectors and so we will be able
to connect to objects electronic cards and to sensors
 to be able to use the data we collect to activate other objects based on the calculations we've made.
to illustrate how we can use this GPIO
connectors we have retrieved a small
robotic arm which is a toy that we
sacrificed for this occasion we
transformed its remote controller into a
small electronic patch up so that the
orders will be given
simply by sending signals right left up
down with four of the wires that are
plugged into these connectors the others
aren't plugged there you go
demonstration so we have some code here
that's will Fram language
a bit of code that sets up the orders we
send to these connectors and I gathered
all this into some small buttons so
demonstration
so up down to the right at the same time
we stop it
going back to the left the batteries
that make it go left are a bit more
tired but we can still go to the left
end up at the same time so here's what
we can do with the output-input
control ports of the Raspberry Pi