Ultrasonic Sensor HC-SR04 and Arduino Tutorial
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- เผยแพร่เมื่อ 25 ก.ค. 2015
- Please note, circuit diagram at 0:56 should be: 5v to VCC, GND to GND, D10 to Trig, D9 to Echo.
howtomechatronics.com/tutoria... ► More details, circuit schematics and codes from my official website.
In this Arduino Tutorial you will learn how to use the HC-SR04 Ultrasonic sensor. It can measure distance from 2 cm to 4 meters with a ranging accuracy up to 3mm. The working principle of this module is quite simple.
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Please note, circuit diagram at 0:56 should be: 5v to VCC, GND to GND, D10 to Trig, D9 to Echo.
@Mikolaj Kraszewski You may well have several sensors, you just have the first sensor finished before you start the next sensor maybe there should be a delay between the two sensor code
Could you please send full circuit diagram by connecting with LCD display
i m little confused you sent a 10 microseconds long pulse, doesn't matter where it goes it will be 10 sec long and " pulsein" is calculating the time from high(when the pulse enters) to low (when pulse ends) and it is 10 micro seconds.
but it is calculating the time from transmitting the pulse to receiving the pulse
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my ultrasonic sensor got fried, i think. lol
Wonderful. Thank you so much. Very easy to follow and the maths was explained very simply.
This video is incredible, code is so much easier to understand with the calculations. What a guy!!
Glad it helped!
I love the video, much easier to understand than the technical sheet
No Words for the appreciation dear. Hats Off. Keep making these type of tutorials.
Clear and concise! Thank you!!
Thank you! I'll be referencing this in my next video. Please be aware that your fritzing diagram is incorrect.
The code works, but is not the best to combine with other stuff. It is really advisable to connect the TRIG to pin 3 and let an interrupt do the measuring in the background, so you don't have puseIn halting your code completely while sensing.
Cool project!. Besides arduino, I have also tried to use 2 esp8266, you can get sensors and displays without cables
Excellent tutorial! Thank you very much for your explanation!
Best code ever! Thank you :)
Great job SIR, for those who ask about LCD connection please see the code (2.3.4.5.6.7 on arduino pins = 4.6.11.12.13.14 on LCD) thanks.
you can fit the sensor on the arduino without a breadboard: just use pin 11 as vcc
Мужик, красавчик, мудро поступил и делаешь контент на английском. Респект!
Perfect as always ty!
awesome work dude. can you please explain why did you set the trigger pin to LOW initially for 2 microseconds ??
thank you
You have echo and vcc in series. The red wire should be I the right most pin of your diagram.
Even that is swapped, right? Red is vcc, so leftmost pin, and black is gnd, so the rightmost pin
Thx dude. I never knew this channel was so helpful. Subbed.
excelente tutorial!
Thanks for the video! Does it work if the object is not perpendicular to the direction of the sound wave?
Thank you soooooo much! This really was useful.
Very to the point. Thanks!
Good and simple... ! Nice video, keep on man!
Maybe just one thing to add up, the moment you set trig pin to HIGH, echo pin will be switched to HIGH as well, until it detects the back wave. That's why the period of echo pin input on HIGH mode equals to the time ultrasonic wave travels.
Why echo pin switches to high the moment we set trig pin to high?
loved it...Thank you sir
Very cool, thank you for sharing!
This is quite helpful . . thank you
thanks for video I also bought it and it work I got inspired by you thanks
Thanks for sharing the code, but I was hopping to learn the physical setup of the US sensor as well
Thank you for the video! Worked perfectly from the first time. I've just bought my uno 3 and unpacked it 5 minutes ago and this was firs project i did.
Pozdrav iz uk :)
Ivan
please can i ask how did you display the distance on the lcd screen
Great tutorial dude!
Great videos. Subscribed. Keep up!
This is awesome very detailed explaination
very helpful
thank you my bro
keep it real
love from india and battir
3rasi
Hi, im thinking about build this for my car. do i need more then one sensor for front and back or is the angle of this sensor to small?
nice tutorial, easy to understand
Thank you!
excellent tutorial,
How can i make it water proof to use it for my car , on rare bumper
hi.this video is a good illustration.can we find speed of the obstacle?
I looked up that this version of sensor is vulernable to interference from other ultrsonic sensors, if that is the case could I use this sensor to create a Local positioning system using a tri-lateration? What are your thoughts? Thanks
Is there something like an expansion of this code on the timetravel?
duration=pulsIn(echoPin, HIGH);
Because i’m planning to use other radio frequency module but still same concept of getting distance as ultrasonic
thank you !
I have something more or less similar to this. It works in terms of reading cms but when the results are really inconsistent for me. If i have an object 20 cm awaay it will sometimes print out 20cm but mostly it will print out 1cm or 2 as if theres something messing with it. What could be the cause?
Awesome video thank you
Does it work for things tilted in some directions? Or for ball or hand?
Very nice tutorial..
Does it have to constantly be connected to the computer to get info from the serial monitor?
can you also set the distance fixed while the system is doing other things ?
thank you.
The code works fine, however the circuitry you have provided in the video is connected wrong.Other than that thank you for the explanation, greatly appreciated!
Hello. I built the regular circuit and it is working great! I tried to watch your LCD tutorial and use the code give, but the LCD is just turning on and not displaying anything. I would really appreciate it if you or someone else could paste a diagram of the circuit used to build the circuit with the LCD display. Thanks alot for the help and the great video!
The problem with the LCD might be the contrast. You need to apply an appropriate voltage to the contrast pin.
very very helpful .... thanks a lot
just have a question, how would we be able to calculate the minimum distance reading or the resolution of this sensor?
Hi, if I want to use 7 segment display, how I have to make it? Thanks
what about angled distances
can i mount two of them on my car's rear bumper bellow both tail lights and see the distance of a object lying exactly between the sensors ?
I came up with this project idea. I was like I finally invent something to be proud of hahah. when I started working on this project, I found out that this project is already done by this gentleman. anyway good job boss
Wouldn't the duration be equal to the delay time that you set the trig pin to high?
I wonder if it's possible to use HC-SR04 for "Flow Meters". Would the flow of the water speed up the ultrasound?
The code
```
const int trigPin = 9;
const int echoPin = 10;
long duration;
int distance;
void setup() {
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
Serial.begin(9600);
}
void loop() {
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = duration*0.034/2;
Serial.print("Distance: ");
Serial.print(distance);
Serial.print("
");
}
```
toi alors toi merci
thank you very mush brother.I struggled with a wrong code for a week.error was I used ' ' instead of " "
Can this waves are able to calculate angle of deflection of the medium
Hey, nice tutorial! Do you think this sensor could be used to measure wind speed?
+pezzioliveira6 No, I dont' think so.
Hi may I ask if the distance measured can be send through GSM to phone?
You save my life thank you🥰
The new library is very helpful
Could you somehow code a trigger for when the distance is shorter than a certain length, then have a count of how many times that happens on the lcd
I am a fan of your channel.please send a video of coding Bluetooth module for joystick module
can you make an utrasonic water tank lavel indicator?
maybe even control a pump with it
Can I directly connect the LCD with a LCD shield directly to the arduino uno
Sir will you make a video that how to connect this sensor
Yes follow the instructions on the site, not here. There you can copy and paste the code too.
I'm running this on Arduino Giga and IDE2.2.1. The serial monitor is showing 0 every other line. Any idea why?
Good video and very helpful.
thank you :)
in arduino uno i m out of pins what to do now ? should i purchase arduino mega?
Can i use ESP8266 for sms notification? If it possible could you explain or plz share the link of the connections for our project..
How max distance it will measure can we use in drones to measure height?
Do you think this is possible to use on an agriculture sprayer on the boom? The boom need to raise and lower automatically depending on fields level.
The sprayer travels forward in a speed of about 7km/h.
Tanks for Great intro in arduino world
Can I use a temperature module in it to get a highly accurate distance?
excellent tutorial
Where's the diagram if u connect a lcd
So cool! Thanks homeboy !!!!
Thank you very much.
Where can I get that same LDC display he uses in the video?
I like your technique of highlighting code as you step through it. You have a good "classroom" approach; I wish everyone did this; it would allow absorbing info easier on us students. Tkx My problem: I'd like to use the HC-SR04 Ultrasonic sensor to shoot through a 7 cm opening (mason jar) and sense the liquid (alcohol) level in it from 3 cm (top of jar) to 20 cm (bottom of jar). Will the sides of the jar interfere with the sound pulse? Thanks
Thanks for the quick reply - so, if I understand you, the sides of the jar would obscure any reflexion from the liquid; the technology would not work inside a jar. Can you suggest any alternative that does not involve contact with the liquid (phytosanitary) or modification of the liquid container (using plain old mason jar)?
Thanks I found this helpful :)
I want to know that ,will this code going to run on MSP430 launch pad ?
We can use
Duration/29/2
how the change in program when i eliminate lcd and place three 8 segmented display
hello can ultrasonic sensor work two task instances i.e to sense an object and an send information to servo motors to be used to turn when it sense an object
Is there a way I can make the sensor produce higher frequency ultrasound ?
If not, where can I find a sensor capable of producing around 96 KHz or even 161 KHz ?
which connection pins for LCD with IC2 module for SDA and SCL???? what to connect in arduino?
sir, where can i get this full model? Thank you
V good explanation
how do you do the wiring for the display thing?
does the code used by you can be worked in arduino 1.8.8?
thank you so much
I broke my ultrasonic sensor cause of your diagram 🙃
Hi! Excellent video! How could I run a video on my computer using only the ultrasonic sensor? That when I stand in front of the sensor, a certain video is executed. it's possible? Thank you!
You can do it by clicking Ctrl+Shift+M
Can you provide the wiring diagram of LCD with this project?
hi I wanted to know if we can measure the distance in mms.. eg 3.3 cm or 10.5 cm as everyone on TH-cam is showing only 0 significant digit after decimal I.e. 3 cm or 10 cm... also are there more accurate sensors for measuring distance and displacement. please reply asap.. thank you.
D Prakash
Hi! Here because of a science project, can I have the list of materials used?
whether the wave exits the trig leg and enters the echo leg
how do you make the com23 tab tell you what number ou want, i know how to pull it up, but dont know how to use it