Arduino Tut. #6 - Breadboarding the Microcontroller - External Components Video Lecture | Drones for Beginners: How to make Arduino Drones - Electronics and Communication Engineering (ECE)

how's it going guys Vlad here and
welcome to the sixth Arduino tutorial
which is a follow up on the previous one
where we install the boot loader on the
atmega328 which is the heart of the
Arduino and in this tutorial we're going
to take a look at how to actually
implement this IC into your project by
first bread boarding a very simple
example so the blank example from
Arduino for this particular tutorial
you're going to need a couple of jumpers
you're going to need a breadboard you're
going to need your led with a 220 ohm
limiting resistance you're going to need
your oscillator so 16 megahertz crystal
you're going to need 222 Pico farad
capacitors you're going to need a
push-button as well as the resistance
for the reset pin of the microcontroller
so without any further delay let's take
a look at what we actually need to
connect and assemble for your circuit to
work on a breadboard alright so what I
have here is the atmega 168 and mapping
diagram which is equivalent to the 328
as well so let's take a look at what we
actually need for the arduino to
function on a breadboard so first of all
over here you have the reset pin so this
is where we're going to actually pull it
up to 5 volts to avoid resetting and
we're going to include a push button to
put button to the ground so if we want
to reset the the whole circuit we're
going to just press on the push button
we're going to also connect the VCC the
ground I'm going to connect the ground
over here a VCC also so these are
mandatory connections for your chip to
work also the Arduino uses an external
oscillator which we're going to have to
connect so as you can see there's an OSC
one OSC two pins so we're going to play
a crystal here right and each crystal
pen and this is specified once again in
the atmega328 datasheet requires a
capacitor so there's going to be a
capacitor here go into the ground and
there's going to be a capacitor here go
into the ground so those are the 22 Pico
farad capacitors the blink example for
the Arduino as you all know goes on
digital pin 13 so notice that this pin
is not pin 13 but pin 19 on the
microcontroller so pay close attention
because all of the pins differ so you
need to actually make sure when you
program in the original language you
understand which pin you're programming
on the microcontroller so let's grab the
breadboard and connect whatever pins we
have specified over here all right so
here's our standard breadboard let's put
an IC like soap where we have a VCC on
pin number seven that's pin number seven
we have a VCC on pin 20 so that's three
it's over here that is done so now our
IC is powered we zoom in a little bit so
you guys can see it a little bit better
we have our ground right below the power
supply that is the ground we have an
other ground on the other side so one
thing to notice also I have the
bootloader as well as the sketch loaded
onto these atmega so make sure you do
that before you take it off the the
Arduino so digital pin 13 as I mentioned
is
located over here instead of where you
would normally find it let me just move
it over here like so so here I'm going
to connect the LED so pay attention to
the long lead so plus is always the long
lead okay so that's the LED as I said we
have a crystal on pin 9 and 10 so that
would be right here like so we have two
capacitors to plug in between the each
pin of the oscillator and the ground
like so and finally our push button for
the reset put it over here so this is
the reset pin which is going to be going
to one side of the push button and we're
going to tell them go to the ground and
also we're going to pull it up with a
very high resistance this is done to
prevent any resetting if you have have
any spikes going on on the reset bend
your chip may reset unexpectedly
so you should always bring this pin - hi
all right so this is the circuit I hope
everything is fairly clear from the
video let's plug in the power I know
already a 5 volt power supply so I don't
need to do any conversions and let's
take a look at how it actually functions
all right so I've plugged in the power 5
volts onto the rail and as you can see
the LED which would be a 10 13 of the
Arduino is currently blinking so this is
the basic blink sketch loaded onto it I
had made a small mistake on the push
button actually the open side is over
here so as you can see if I push the
button and hold it down nothing's going
on because the reset is pulled low so
nothing is happening on the atmega if I
let it go you get that usual blinking
when the Arduino boots up so everything
is working as expected as you can see
there is not that many components that
you actually need to make a project an
external project work with just the
earth with just the Arduino loaded onto
an atmega328 so feel free to experiment
let me know which projects you actually
built if you actually incorporate it the
whole Arduino in your project or if you
decided to go this route and replace
this board with just yet mega 3:28 thank
you guys for watching if you enjoyed
this video make sure to subscribe leave
me a comment for what else you would
like to see thank you very much
bye