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Video tags
Subtitles
Russian
00:00:09
hello to you today soldering iron tv00:00:12
and we continue the lessons dedicated to00:00:16
the microcontroller does not cost eight00:00:18
today we will have a practical lesson00:00:20
we will try to use the x cs4 sensor00:00:26
which is an ultrasonic sensor00:00:29
for measuring distance we will try to00:00:33
connect it to our microcontroller00:00:36
also with it we will connect an active00:00:43
piezoceramic sound due to the series of00:00:45
star legs, the emitting element of the sensor y00:00:48
0 12 that's all together, you00:00:51
get a device designed to00:00:54
measure distance with simultaneous00:00:57
output of information to see sand,00:01:01
yes, that is, the closer to the distance the topic is more often00:01:03
food, this is actually a parking sensor for00:01:07
cars, let's say also small00:01:11
reworking the program of the one that will00:01:12
fall when presented, it00:01:14
is possible to use it, for example, a00:01:16
level sensor in00:01:20
some container into which you00:01:23
fill, let’s say at home you fill00:01:24
the container and as you fill it, you00:01:27
measure the distance from the sensor and00:01:30
thereby control how much you have00:01:33
there water or a car is parked there00:01:36
backwards and you hand it over and00:01:38
it starts faster and slower to promise what the00:01:44
sensors really are, Russia, the tweeter is00:01:46
active, that’s why it’s active, it promised00:01:50
nothing, it doesn’t do anything tricky, we do00:01:53
n’t hang one leg on the ground, we00:01:56
give it to the other the output of the sport is visible in the diagram,00:01:59
that is, it is shifted to gamma on the00:02:01
ground 2, the sport is simply fed and when00:02:06
we hit one, it starts to squeak the00:02:09
ultrasonic distance sensor itself, it00:02:12
works a little more cunningly, it has00:02:15
4 inputs,00:02:18
two of which are the supply voltage on the00:02:20
sword and supply voltage is required00:02:22
5 volts, that is, on00:02:24
stm and modellers 8 discovery yes on our00:02:27
debugger it00:02:28
will be necessary to switch the upbringing00:02:30
3 3 volts there by default usually 3300:02:32
is set to 5 volts how this is done there00:02:35
we have a gp1 connector named00:02:40
on the board there it can be seen strict and there is a00:02:42
jumper left on it, this jumper00:02:44
must be switched from 1 to 2 pins if00:02:46
it is there in the second third then the power supply for the00:02:48
entire processor and all the singer test on00:02:50
the portal for a long time we will have water from five00:02:52
volts what else does it have in the country what codes on it00:02:56
there is a cat trigger and start echo output how00:03:00
they work in order for it to start00:03:05
giving us a signal that tells us the00:03:08
distance to the target, we need to apply00:03:12
a trigger to the input that triggers a pulse00:03:14
lasting 10 microseconds00:03:17
or more after that, that is, one, yes, that00:03:20
is, we set the port to which00:03:22
we have our sensor connected to one00:03:26
we keep it in this state for a time of00:03:29
more than ten than 10 microseconds,00:03:31
we lower it, and then mine starts to00:03:33
work, how it works, it00:03:35
forms a packet of pulses, as you00:03:37
can see here,00:03:39
high-frequency 40 kilohertz of new beeps00:03:42
with them in some direction and begins to00:03:45
measure the time for which the sound00:03:48
passes back and forth at the output at this00:03:52
moment, an echo is formed at the output, a00:03:54
pulse is formed with a logical level of00:03:59
one active, that is, when we00:04:01
have a unit, we begin to measure the00:04:03
time that our00:04:07
sound signal moved to the target to the target and00:04:11
back, that is, in order for us to measure the00:04:15
distance we need to measure the time00:04:17
which is at the output of the nizhnikov00:04:20
during which00:04:23
a unit appears at the output of the echo after we have00:04:25
given the trigger the trigger pulse then according to the00:04:28
formula00:04:29
some from us that is the time that00:04:32
we measured is microseconds green 5800:04:35
it turns out we have one centimeter yes00:04:38
that is we measured the time, let's say we00:04:40
got 58,580 microseconds, then this00:04:45
distance to the target is 10 centimeters; the sensor00:04:48
allows you to measure distances from two00:04:52
centimeters to 4 meters with the greatest00:04:53
accuracy and on the board it reads in the range of 3000:04:57
to 60 centimeters; it is quite suitable for,00:05:01
say, a parking sensor which is00:05:03
like ours now this is also suitable00:05:05
for sensors, let’s say filling00:05:08
something, let’s say you have a barrel and00:05:10
you draw water, there is00:05:12
a sensor at the top and it measures the distance to this00:05:14
water when it’s all at the threshold00:05:16
level, turn off the water intake the00:05:19
maximum distance that can be00:05:21
measured using this sensor is 4 meters,00:05:23
that is, for a parking sensor it is00:05:26
perfect for, as already00:05:29
said, a level measurement sensor, it is00:05:31
also suitable great and it is00:05:33
also possible to implement other applications on it,00:05:35
say a sensor that will00:05:39
respond, say, the passage of objects00:05:43
of any kind past it, that is, you00:05:45
direct it at some obstacle00:05:47
and when any object passes between the sensor and the00:05:49
obstacles, the00:05:52
measured distance00:05:54
will change again and you will notice that00:05:56
your object has crossed this zone; we’ll00:06:00
see how this is implemented in00:06:01
our program. What are we up to? we do it in order to00:06:04
service the sensor and the program is more precise,00:06:07
first let’s look at the diagram, I’ll explain what is00:06:09
shown in the diagram, how we connect it,00:06:12
so in the diagram, here we have diagrams for00:06:15
connecting it, this is our modules costing00:06:17
eight discovery debugging yes we00:06:19
use the jumper itself, we need to00:06:21
install it, that is, this is the jumper that00:06:24
switches the power supply of fear 1 loop to00:06:26
5 ult for this you need to straighten00:06:28
close the second third leg00:06:31
Jane peas rearrange and two connectors00:06:34
cent 400:06:36
cn22 take the supply voltage 8 leg is00:06:40
our 5 volt 7 leg is our ground on the00:06:43
connector and we connect to our sensor00:06:46
with 44 ground and to ours to the limitless00:06:51
active emitter we must connect00:06:55
the ground as ports, we use the00:06:59
microcontroller ports on port d 7 pairs00:07:02
d6 and under up to 4 they brought us to the00:07:07
Sep 4 connector and here the service can be seen how we are00:07:09
connected, that is, we are under d6 this is 11 this is00:07:13
us launching00:07:15
ultrasonic sensors to measure pores up to 7 1200:07:20
pin n4 this is our sensor output, that is,00:07:24
here we measure the time which00:07:26
I will be present here signal00:07:28
port up to 4 9 pin connector cn 4 this is00:07:33
our tweeter here we will be squeak that00:07:36
is, here we give one and then we00:07:37
have a sound go to the program in the00:07:41
program in the program what we do in the00:07:43
program first of all, we of course00:07:45
set up our ports that we will00:07:46
use this time up to 7 sales from type00:07:48
up to 40 to 7 as it was said the output of00:07:51
our sensor, that is, the output of the glasses from00:07:53
it, we will measure not pores up to 6, to00:07:56
launch the sensor from it, we will launch the00:07:59
sensor from it, pores up to 4, this is a tweeter, including it,00:08:01
we will beep here until 7, we00:08:06
configure the output to be a clean output, let's go00:08:09
to a clean output here, without any00:08:11
pull-up resistors, without anything, we00:08:13
just have a floating code, we all00:08:15
measure on it panda 6 under 4, in the00:08:19
same way we configure it as00:08:20
high-speed outputs,00:08:22
but everything is also there, nothing so00:08:26
complicated there, how it works for us00:08:29
means00:08:33
they install it like it was said00:08:34
we set our output of the desk to 600:08:39
which is connected to the input of the trigger of00:08:40
the sensors,00:08:41
we hold the unit for some time, namely here00:08:45
it is set here, this is some kind of personally 3000:08:48
something there turns out to be00:08:51
about 17 microseconds after which we00:08:54
lower it again to zero and start wait for00:08:56
when a00:08:58
single pulse begins to appear from the output of the00:09:03
echo sensor, as soon as it begins00:09:06
to appear we begin to measure time,00:09:09
that is, we increase the time register and we also00:09:12
measure how much time has passed while there are00:09:16
units at the input, as soon as the00:09:18
unit disappears we return from this00:09:21
function, here is a range measurement function00:09:25
where we divide the result that00:09:28
the function passed to us by some00:09:29
value, I subtract it as I measured00:09:33
the distance and when changing personal and looked at how much00:09:38
time it takes me, I00:09:40
got a price tag of 43, this allows us to00:09:45
get the value here in this00:09:49
radish the range is in centimeters how it00:09:52
works, let’s say we direct the sensor00:09:55
to besides the cattle on the adjacent wall an hour00:09:57
is directed at it for about two and a half00:09:58
meters this is 2 and 3 here it shows us the00:10:00
value here at 2 and 3 meters let’s try to00:10:03
direct to another place so00:10:06
we redirected 21 centimeters,00:10:11
yes, this is how it measures how it beeps beeps00:10:16
how we implemented the beeper,00:10:19
or we installed00:10:21
the timer on the timer, we sorted it out in the last lesson,00:10:23
if you remember, you can see how it’s00:10:26
all done there, that is, the settings for the00:10:28
light timer are the same the same00:10:29
thing, that is, somewhere you get00:10:34
200 microseconds each00:10:37
timer interrupt and we implement a tweeter for this,00:10:41
we organize low registers, more precisely 100:10:44
register of us will be specially00:10:47
called bitumen for the tweeter every time when about00:10:49
someone 1 on the timer we increase by00:10:51
one if we have less than ten, yes,00:10:54
that is, it turns out to be two milliseconds00:10:56
in sound, it’s normally audible to the ear00:10:59
now, it will seem to you like it’s00:11:00
heard there and with food, yes, it turns out that we have a00:11:06
list, if not, then we don’t write,00:11:10
but the Sunny register is resettable to me 0 then00:11:14
there is, and we continue to count00:11:15
further, we count up to the value of00:11:18
our measured range, multiplied by00:11:20
2, that is, with this we implement that same00:11:23
time delay between the sands, that is,00:11:25
yes, that is, but the range is increased, the longer it is, the00:11:26
delay between00:11:28
searches turns out to be longer, this is how00:11:32
it works how it works how it can be heard as00:11:35
it can be seen now I’ll connect the sensor00:11:37
beeper I mean, I’m connecting it I beeped the00:11:41
glasses and let’s say I point it at the wall I do00:11:47
n’t know whether you can hear it you won’t hear it00:11:48
we tried to make it audible00:11:50
we launch the program00:11:52
here we have the beeper and here it is I bring00:11:55
something between it and the wall of the vessel, the property00:12:02
starts to squeak, the length is00:12:07
planted a little inconveniently, like a special one, I00:12:12
won’t show you the video, I don’t have00:12:14
a video camera, of course, he00:12:16
would show it all better like this, I can00:12:20
only show you a photo, these photos with phones are00:12:22
beautiful, well, they are so beautiful there is, don’t blame me and00:12:25
there is no other equipment,00:12:27
let’s say no one wants it, and this is what it00:12:28
looks like, here’s the sensor, here’s ours, here’s our00:12:34
module, here’s the wait, ticklish beeper, here’s00:12:37
our module, connected, and00:12:40
what does it look like, so it works, in00:12:47
principle, I don’t know instantly, anyone00:12:49
interested, you can finish it lights, in00:12:52
principle, in fact, you can complete all this00:12:55
to a normal circuit,00:12:58
use a normal microcontroller for its intended00:12:59
purpose, that is, like a car parking sensor,00:13:01
it works stably,00:13:03
no failures or errors, nothing00:13:05
arises, well, what else is the00:13:09
follow-up to these, I would like to say the00:13:10
real seeds, let’s get down00:13:13
to answer those theories about the ADC module, yes, that00:13:16
is, we will analyze the ADC module,00:13:18
how it works, after which we will try to00:13:20
implement a thermometer on it using thermistors,00:13:24
that is, with an indication of00:13:27
temperature changes, that’s probably all you00:13:30
had with you, a soldering iron, you’re on a dateDescription:
Рассмотрено построение датчика парковки на базе ультразвукового датчика HC-SR04 и активного пьезокерамического звукового излучателя KY-012. Файлы можно скачать в теме поддержки на форуме: http://forum.cxem.net/index.php?showtopic=162791 HC-SR04 стоит менее 1$: https://hz.ru.aliexpress.com/af/HC%25252dSR04.html?SearchText=HC-SR04&af=2052_1&cv=3122818&cn=45sewilntannh8rz8xij6medukswwqoj&dp=v5_45sewilntannh8rz8xij6medukswwqoj&af=2052_1&cv=3122818&cn=45sewilntannh8rz8xij6medukswwqoj&dp=v5_45sewilntannh8rz8xij6medukswwqoj&afref=&aff_fcid=dc1fe2070cf34d979ba8b73dda47f5b2-1718084651551-03003-_9hwhcM&aff_fsk=_9hwhcM&aff_platform=portals-hotproduct&sk=_9hwhcM&aff_trace_key=dc1fe2070cf34d979ba8b73dda47f5b2-1718084651551-03003-_9hwhcM&terminal_id=80222714895448e992ccb42644efdb3b
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