what's up my friends welcome back so let
me explain today's project
you see I've already made a lot of
projects that use this on RF 24 ad
module and I've already built a lot of
Arduino based radio control as you can
see here but I never explained only how
to build the radio controller because it
was always part from a bigger project as
my Arduino based drone the radio tank
here or the Spitfire plane so a lot of
you guys had some problems establishing
the connection between the two modules
or understanding the code so today I'll
make a tutorial on only how to build the
radio controller so this project will
have two parts first we'll build the
transmitter and then the receiver which
will be as any other commercial receiver
with some PWM outputs I haven't tested
the range of this project yet but I did
with my other projects which are more
than the same and I had a good signal up
to 700 meters well guys before we start
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guys so let's begin this project let's
see how to establish the connection
between the transmitter and receiver how
these little modules designer Estonia
for module works and so on so let's get
started
[Music]
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what's up my friends welcome back here I
have my a t10 radio controller it has 12
channels and is compatible with both
these two receivers one has a PWM and
SBUs signals and the other one has PWM
as pass but also ppm and that's exactly
what we will build today we will build
the radio transmitter and then talk
about two types of receivers P mm and PP
n signal so let's begin
so first let's build the transmitter
because it will be the same for both
type of receivers in one of my past
tutorials have used an old already made
radio controller and hack it with an
Arduino inside but in order to not
confuse you guys too much I will build
today's project using simple separated
parts here is what we need first a big
drill PCB to solder everything on it I
want two joysticks each with two
channels so I will use this small
joysticks that I've bought from eBay for
very cheap
I want my controller to have two more
channels and I will make those digital
channels so I will use this toggle
switches that will send a 0 or 1 finally
I add an extra analog channel using a
normal potentiometer of course we'll
need the an RF 2 info radio module for
the transmitter you should use a power
amplified one so we will have more range
you see the transmitter needs a powerful
radio module but the receiver should
work ok with the normal one
as well if the signal gets to it it
should work just fine
of course you could use power amplified
radio modules for both the transmitter
and receiver but that would increase the
price a bit now a very important part of
this project it's a good voltage
regulator you see the Arduino works at 5
volts but the an RF 24 module at 3.3 if
we supply 5 volts to the radio module we
will burn it so I will use the Arduino
Nano which already has a triple tree
volts output but is not powerful enough
it can supply enough current for that I
will use the AMS 1 1 1 7 3.3 volts
voltage regulator finally to supply the
circuit we could use a lipo battery or
maybe directly a net volts battery like
this one but it won't last as much as
the lipo
check the part list below to see all the
extra small components this is the
schematic of the radio transmitter have
it in front of you while soldering and
make sure you follow well all the
connections I take the piece of true PCB
and a first holder in place the
joysticks they have these thick metal
pins so you would probably have to
enlarge four holes for each one in order
to fit them in next I soldered the radio
transmitter module in the top center
position of the board so it won't have
too much interference now a very
important step is to solder the Arduino
quite close to the radio module you see
the longer are the wires or the PCB
connections from the Arduino to the
module the higher the noise will be so
make sure you have very short
connections and if you use free wires to
connect the SP pins you could also
please ground around mozi and mine so
wires in order to lower the noise a bit
that helped me in certain situations
next I add the two toggle switches one
on each side and those will be the two
digital channels and finally the extra
potassium meter that will be an analog
channel to power on and off the board
I've added this kind of sliding switch
the battery will be connected to the
switch so when we slide it the entire
board
we'll be supplied finally I soldered the
triple tree voltage regulator with the
coupling capacitors and make all the
connections as in the schematic those
connections include supplied 5 volts and
ground to the joysticks to the switches
and the potentiometer connect 3.3 volts
to the an RF 24 module make the SP
connection by soldering the Clarke mozi
and missile but also chip select and
chip enabled and finally solder each
analog output from the joystick
potentiometers remember to solder the
wires from the battery to the sliding
switch also very important make sure
that all the voltages are correct you
should have exactly 3.3 volts for the
radio module and 5 volts to the Arduino
now the board is ready all these there
to do is to program it if you want a
better looking board
feel free to download my design from
below of this board you have the Gerber
files in a zip below just download it
and send it to GLC PCB and order your
board for a very low price and give your
project this professional look and also
with a gyro control so you could move
the radio control device just by moving
the controller check the description for
more well we have the transmitter now
let's build a receiver that should be
quite easy all we need is the Arduino
Nano the an RF 24 receiver like this one
another trip one trip voltage regulator
and a small PCB we will use this command
in the description you will see two
schematics for the receiver they are
more than the same but one has seven PWM
outputs and the other one only 1 ppm
output on digital pin 2 depending on the
project that you want use one or another
ok so i've sold her everything in place
the arduino with female pin so i could
take it out when i want the radio module
and make the connection just as in the
schematic i soldered the AMS strip on
three voltage regulator and remember to
add a 10 micro farad and 100 nano farad
capacitor to smooth the trip on three
voltage the receiver won't need a
battery supply since just as any other
commercial receiver it
we'll be supplied with directly 5 volts
as you could see here on this receiver
we have ground 5 volts and signal now as
you can see this commercial receiver has
90 degrees pins for each channel I don't
have that now so I will use normal
straight PCB pins you have to solder
three pins for each channel ground five
volts and signal this kind of radio
connection could have up to 32 channels
which is the maximum supported by the
other half Tony 4 module but the Arduino
doesn't have that much digital pins in
my case I only have 7 channels now we
are ready to program both the
transmitter and receiver this is the
part where most of you guys had some
problems since you weren't able to
receive data so for that before let's
make a quick test to keep it simple on
the breadboard connect the transmitter
and the Arduino with only one
potentiometer connected to analog pin a
zero use this example schematic for that
make sure that the aspect connection is
as in the schematic you could also one
ground around mozi and missile wires for
last noise also add a small capacitor
between ground and tripping tree votes
now on another breadboard make the same
configuration but in this case without
the potentiometer since this will be the
receiver now download the transmitter
and receiver test calls from below make
sure they are the test codes not the
final code of the project now open
arduino ide two times and open the
transmitter code in one and the receiver
in the other upload the codes and then
go to the serial monitor of the receiver
part and open it set the bout rate to
9600 and you should see the data for
channel 1 move the potentiometer and the
data should change according to the
potentiometer if there is no good
connection the data will always be the
same even if you move the potentiometer
if you receive data then your connection
is working so guys we can program our
radio controller now download the
transmitter receiver codes
be careful there are two receiver codes
one for PWM and the other for ppm I will
use PWM for now this is the transmitter
code let me explain it step by step
first we import the libraries that we
need make sure you have the an RF 24
library installed if not you could
download it from below then go to sketch
include library and add that zip library
and select the zip file that you have
just downloaded and now we are good to
go you could also use the library
manager to install it next we define the
radio pipe this code should be the same
in the transmitter and receiver since it
is a unique code for the radio
connection having multiple receivers
with the same pipe code they will all
receive the same data from the
transmitter next we define the chip
select and chip enabled pins for the SP
communication these two could be any
digital pin of the arduino in my case
our pin 9 and 10 the other SP panes must
be digital pin 11 12 and 13 since those
are the clock mozi and missile ports of
the arduino and they can be other pins
now we create a structure type variable
and store each channel value in this
structure this could have up to 32
channels each of eight bits or better
said one byte I name each channel from
channel 1 to 7 now we create a variable
with that structure and name it send
data and this will be the package that
we will send ok
in the setup void we begin the radio
communication using the begin function
that the an array of 24 library already
has we set the radio communication
configuration and open the radio pipe
with the variable my radio pipe defined
before the next lines will reset the
channel values in this case all 4
potentiometers of the joysticks will be
in the middle position since we can
always send 8 bits per channel which in
decimal is 255 well the middle of 255
will be 107 that's why I reset channel
to fall with these values next we have
two digital channels channel 5 and 6
with value 0 or 1 and finally another
analog channel but with value 0 since
this will be connected to a
potentiometer that will have its initial
position to zero in the void loop we
have to read each analog and digital
inputs which in this case are analog
pins a 0 to a 4 and digital pins D 2 and
D 3 we map these values to range between
0 and 255 since we can only send a bit
and store the values in our send data
variable and we send the entire
instruction using the radio that write
function okay so the transmitter code
was very simple now let's take a look on
the receiver side it is a bit longer but
that's because each line is repeating
for each channel once again import the
needed libraries in this case we import
servo library as well for the PWM
signals define the pipe as in the
transmitter code and the chip select and
enable pins again we create seven by
structure for the received values now we
create seven server types and define the
PWM emission value for each channel in
the setup loop we attach the PTM signals
to pins from digital D 2 to D 8 and
finally we configure the radio
connection and start listening next we
have this function called receive data
this function will receive the data and
store it in our structure now in the
word loop we use this receive data and
get the values right below we map the
received values from eight beats to a
value from 1,000 to 2,000 microseconds
since those are usually developed at any
commercial radio receiver used for PWM
signal using the right microsecond
function we create each of the seven p
mm signals and we are done now connect
the USB and a put these codes to the
transmitter and receiver I connect the
battery to the transmitter and pour it
on supply 5 volts to the receiver with
the USB and I will connect two of these
channels to my oscilloscope and there
you go i perfectly receive the data from
the transmitter
if the values are not exactly in the
correct range which is from 1,000 to
2,000 microseconds then go to the
receiver code and change these values
here in order to match the minimum and
maximum values for each Channel so there
you go my friends we have built our own
radio control that works exactly as any
other commercial one but for way less
money in the description you also have
the code and schematic for a ppm
receiver that will create an 8 channel
ppm signal on digital pin to the rest of
the project is the same we have two
digital channels with switches for
channel for logistics and one extra
potentiometer for channel 7 what is left
to do is probably 3d printer case for
this project or maybe leave it like this
so it should have a more DIY look
remember that below you have the Gerber
files for this transmitter board if you
want to send it to Jessie PCB and print
it
this board has 4 analog channels with
these blue joysticks and two more
digital channels with some sliding
switches here you could also add a gyro
module and send that data and control
the air see machines only by moving the
controller but that is for a future
project so stay tuned well guys you have
all the codes and schematics below in
the video description and also my
patreon page check my web page
electronics comm for more details and if
you would like to support me check my
patreon page as well I would really
appreciate that guys it will help me a
lot and I will have more and more
awesome projects I hope that you enjoyed
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see you later guys
[Music]