Name: HC-SR04 超音波距離センサー（Arduino付き (HC-SR04 Ultrasonic Distance Sensor with Arduino)
Uploaded: 2021-01-14T10:43:22.000Z
Duration: 16 min 30 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

please go to the line the computer guy dot com, in order to view schematics, code and Maur for the projects that you are learning about, welcome back.

So in today's video, we're going to do a basic setup and coding for an ultrasonic distance sensor.

程度の副詞

So ultrasonic distance sensors could be very valuable for Aren't we know projects?

Because it gives a relatively accurate reading of how far a way a physical object is from your projects.

You're able to put an ultrasonic distance sensor on something's, let's, say, an Arduino vehicle, and then, depending upon how close the vehicle is to another physical object, you can then set if else statement on what the vehicle should.

So maybe if the vehicle is getting close two to a physical object.

Let's say the physical object is a foot away.

Then maybe you want the art we know vehicle to start turning very slowly.

So you wanted wanted to start turning out of the way of the obstacle.

On the other hand, maybe if the vehicle is within six inches of that object, you want the vehicle to turn very quickly.

So the cool part about the ultrasonic sensors is that you can set parameters so you can say if something is two feet away, do X.

If something is one foot away, do why, If something is six inches away, doozy and Oh golly, golly, if something is one inch away, absolutely do l.

That is what makes the ultrasonic distance sensors valuable as sensors, unlike something like the infrared obstacle avoidance sensors.

If something gets within the bubble, then then the vehicle will react or the artery no vehicle react.

But if the object is out of the bubble, then it won't react.

Actually, you don't have the same accuracy.

You don't have the same precision that you do with an ultrasonic distance sensor.

So that's why these sensors to be very valuable because you can set in a different parameters for different distances.

And then and then your project will do whatever you've coded for.

So let's go over to the work bench show so I can show you the basic components of this particular project on, and then we'll coat it and we'll show you how it works.

So here are the functional components that you're going to need for this particular project.

As always, we're using the basic Arduino, you know, board so you can use another Artemis.

But this is our standard default for when we're doing these projects were using a bread board here.

You can actually connect the ultrasonic distance sensor two yard we know board simply using jumper wires without using a bread board.

But one of things I like about the bread board is the fact that I can put this just directly into the bread board and it actually gives you a stand again.

When you're doing these projects, you're going to run into stupid little problems such as Okay, how do I How do I get it to stand up?

And so one of the nice things with bread boards is you can simply just slop that directly that bread board.

And now not only can you wire to it, but you've actually got a stand so you can work with the sensor and it makes it a lot easier on.

Then finally, of course, we've got the ultrasonic sensor.

Now it is important The ultrasonic sensor that I'm showing you today is the HC hyphen s r 04 So there are different ultrasonic sensors out there.

I forget what model this is, but this is a different ultrasonic sensor.

You'll notice the eight c hyphen s r 04 has four pins on it, and this particular ultrasonic sensor has five pens on it s o.

So this is one thing to remember whenever you're dealing with sensors.

There are a lot of sensors out there where where basically the technology they use is the same.

So you'll see this with infrared sensors to where you'll go out and you'll buy an infrared sensor.

And the infrared technology part is the same.

But in the actual board, the actual module may be different, and so then you may need to wire it and code it slightly differently.

So this is just one of those things to keep in mind.

So if you're gonna be doing this particular project, But that too aside, go for the eight c hyphen s r zero, for this is going to be a model that we're using.

So these are the main functional components to it.

But those two aside and then this is the actual project itself.

And it's a very, very, very simple project.

So if you uh if you pull off your ultrasonic sensor on the back of it or possibly on the front of it, it will show you what the pins are.

If your particular censor it does not have this, then you may just have to go thio the documentation and take a look.

So basically, you've got ground on one side, see of ground.

You have eco, you have trigger and you have vcc.

So ground and vcc they're going be plugged into ground is gonna be plugged into the ground on your doing aboard.

VCC is going to plug into the five volt on your Arduino board and then the trigger and echo they will go to your digital pens and then all you're gonna do is make sure your lawn this up properly.

And now this is literally everything you need to basic t build the simple little project.

Take a look at the code to see how this works.

This is the code that we're going to be using for this particular project.

It is important to remember what's particular project is.

We're not going to trigger any physical events were not turning on Ellie desire turning on buzzers or anything like that.

All we're going to be doing is we're going to be reading from the cereal monitor.

So what this shows you is that the sensor can detect distance, and it could turn that distance into the value for a variable going into other projects in the future.

We will then be able to test against the value of that variable, for if else, if l statements on, then actually be able to do something based off of that number.

But for this simple project, all we're going to be doing is we're going to be printing out to a serial monitor.

The first thing, of course, that we need to do is we need to define the digital pants.

We have the trigger pen and we have the echo pen, so pound define trigger pin goes the digital pin £8 to find echo pin goes digital pen nine that tells the Arduino board where where these pens are on the Arduino itself.

The next thing that we're going to do is we're gonna have to create three variables we're going to do a long four duration.

So there are different variable types when you're dealing with hardly knows when numbers are concerns.

You have ent, you have flowed and you have long.

So an end is a whole number of between 32,000 something and negative 32,000 something, right?

Float float is a decimal, so 10.1 is afloat.

Ah, 1000.2 is a float, 30,000 0.5 is afloat.

What long is long is a number that's larger than an end, eh?

So basically, if you need to be in the store a whole number that's larger than 32,000 then what you're going to do is you're going to have to have a long variable time.

So for the duration here, we're gonna have a long day variable type.

And so we're doing you sicko long and then we're going to create the variable duration.

Then the next two variables that we're gonna be creating our floats.

So again, decimal points, we're going to a float for distance and centimeters float for distance and inches.

So what's gonna happen is we're going to create the value for the variable duration, and then we're going to turn that value in two centimeters and end the inches in the code below.

Then all we do is we go down here, we set up the environment.

So the trigger pin is going to send the ultrasonic signal out.

So echo PIN is receiving the ultrasonic signal.

And so we're going to set that to input and then cereal that began at 9600.

So we can actually read from the cereal monitor.

Then when we go down here, this is just the basic code that you're gonna need to put in if you're going to be dealing with ultrasonic sensors.

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HC-SR04 超音波距離センサー（Arduino付き (HC-SR04 Ultrasonic Distance Sensor with Arduino)

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