HC-SR04 Ultrasonic Distance Sensor and Arduino (Lesson #9)

Science Buddies Electronics Kit for Arduino: www.homesciencetools.com/prod...
Learn how to use the HC-SR04 ultrasonic distance sensor, also called a sonar sensor, to measure the distance to a nearby object using an Arduino. We have a separate video that covers the PING))) ultrasonic distance sensor: • PING Ultrasonic Distan... . See our complete playlist of Arduino tutorials here: • How to Use an Arduino and the Science Buddies website for cool science projects you can do with an Arduino: www.sciencebuddies.org/search....
0:00 intro
0:48 Arduino connections
1:05 datasheet
2:00 code
4:35 comparing the HC-SR04 and the PING
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[@hazelfunnehfangirl5hamburg805]

thank u helped me before getting killed in the program class dude for forgetting to save the process

[@thesuitedsaltshaker8388]

thank you man, helped me a lot

[@k0rnluvr]

Great vid! thanks

[@motomichinakamura6413]

Is there any enclosure or casing available for this setting?

[@Pet-vk3ig]

Nice, good job

[@maximarkhipov2186]

Thanks for the detailed and easy to understand video helped me a lot !!

[@yehonatankalandarev6343]

I want to make a disc shooter that can be attached to the arm, and I want to add a control system to it, basically when the palm "blocks" the shot, the disc shooter will not fire.
So I thought to connect this sensor to perform this operation, do you think it is correct? Does it suit my needs?

[@Science.Buddies]

This sensor would work to detect when an object is within a certain distance. Please see our other Arduino tutorials linked in the description of this video.

[@Studs_Studio]

this is amazing! i made it so if youre too close a buzzer starts beeping. i want to use this on an rc car to automaticly stop

[@Science.Buddies]

Check out the rest of our tutorials and videos on our channel, we have instructions for autonomous/RC robots as well!

[@Howdy-Harry]

Amazing

[@adityamandal2456]

In your Automatic Braking project using Ultrasonic sensor, I have changed the PING))) sensor to HCSR04. But there's a line in the code saying
distance = readUltrasonic(pingPin)
Now how to change that👆

[@Science.Buddies]

The program in that project uses a function to read the ultrasonic sensor instead of putting all of the code directly in the loop() function. So, you would need to change the function to use two pins instead of one. For example, the call to the function could be distance = readUltrasonic(trigPin, echoPin) and then the first line of the function would be long readUltrasonic(int pin1, int pin2). You would then change the code in the function to use pin1 (corresponding to trigPin) and pin2 (corresponding to echoPin). We're glad that you asked about this because I realized there is actually an error in the existing example program - the way it's written now, the readUltrasonic function should use the "pin" variable inside the function, not "pingPin." so for example the line pinMode(pingPin, OUTPUT); should be pinMode(pin, OUTPUT). Hope that helps! We will update the example code.

[@adityamandal2456]

@@Science.Buddies Thanks for the information 👍

[@CoolOjas02]

Code?
Can you give doc

[@bfuh_055]

Does this sensor also detect the intensity of the reflected wave?

[@Science.Buddies]

No, it only detects how long it took the wave to bounce back.

[@MotomichiStudio]

How far can the sensor work in terms of distance?

[@itsnd64]

~400cm

[@joshhallwatp3783]

Also saying pinmode was not declared in this scope

[@imahumanbe1ng]

does this work with arduino maker uno x???

[@Science.Buddies]

We haven't used the Maker Uno X but it is listed as fully compatible with the Arduino Uno R3, so it should.

[@jomfawad9255]

does it work outdoor if theres sunlight?

[@Science.Buddies]

Yes, this sensor uses ultrasonic sound and should not be affected by lighting conditions (with the caveat that the speed of sound depends on air temperature, so that can indirectly affect the readings, but the sensor will still work).

[@gauthierwouters2593]

how to do the lights?

[@Science.Buddies]

If you check out our Arduino tutorial playlist (linked in the description) you will find other videos about controlling LEDs.

[@joshhallwatp3783]

When writing the exact same code it comes up with trigpin was not declared in this scope pinmode

[@Science.Buddies]

The Arduino code is case sensitive, make sure your code matches the example exactly (pinMode and trigPin)

[@joshhallwatp3783]

@@Science.Buddies yeah forgot the capital for M

[@Sabbir-ln3bx]

how do you use it with LEDs?

[@Science.Buddies]

Please see our Arduino tutorial playlist which covers LEDs: ua-cam.com/play/PLlBVuTSjOrclb0iCMSRpS_H1lSrlSVeEm.html&si=cyCw5jX3CNvyX5me

[@Zemabri]

im using this against my dog, not for a distance sensor