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

[@hazelfunnehfangirl5hamburg805]

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

[@johnman84]

Okay.... after it taking longer than it should have, I figured out how to make the series of LEDs work! Even at ten inch increments!!! I figured out that I needed to write, threshold * 2 for the second LED. Then I did times 3 for the next, and then times 4! I honestly can't believe I figured it out. I'm so dang proud of myself. Lol 😎 Thanks for the challenge! So pumped!!!

[@cheeseball-k9b]

wow

[@LucasMichelitch]

@@cheeseball-k9bwhere do you write the threshold code

[@Steezyaura]

You have the best tutorial for ultrasonic sensor arduinio I’m subbing

[@khomo12]

Thanks!👍 Yeah, I used my hand, too. It gives faulty readings from time to time. Someone on the Internet suggested taking several(a few) readings and using the median to compensate.

[@veryvaughsome5867]

Great tutorial! does everything it says and does it well. now i gotta figure out how to make it turn on leds depending on distance

[@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!

[@maximarkhipov2186]

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

[@motomichinakamura6413]

Is there any enclosure or casing available for this setting?

[@KJ7JHN]

Is it possible to reduce the frequency a bit by swapping out a resistor on the board?

[@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.

[@graemebrumfitt6668]

Rite Buddies Dude, Worked first time awesome! TFS, GB :)

[@EditB3ast]

This video helped a lot while trying to figure out how to hook up the microcontroller to the ultrasonic sensor👍

[@Dragonforge-Studios]

My little brother burst into laughter when he heard "Male to Female pins" lol

[@CoolOjas02]

Code? Can you give doc

[@limuelmagbanua3137]

I'm having trouble tryna use a grove model of ultrasonic sensors, and it keeps calculating to 0

[@tanawatpittinan6337]

Samw

[@Yancho00]

Same

[@MotomichiStudio]

How far can the sensor work in terms of distance?

[@itsnd64]

~400cm

[@paulcarsco6029]

Can you provide the code link please.

[@EditB3ast]

Except I can’t actually access the IDE

[@thesuitedsaltshaker8388]

thank you man, helped me a lot

[@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).

[@Zemabri]

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

[@lemau8458]

good for you

[@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.

[@kastriotgega2486]

Does it work for underground dedection?

[@Science.Buddies]

No, this sensor is not designed to detect underground objects. The ultrasonic waves will be reflected back and it will just measure the distance to the ground.

[@joshwatp3783]

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)

[@joshwatp3783]

@@Science.Buddies yeah forgot the capital for M

[@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 👍

[@izukq]

Great vid! thanks

[@Pet-vk3ig]

Nice, good job

[@joshwatp3783]

Also saying pinmode was not declared in this scope

[@jackleone1206]

do "pinMode" not "pinmode" thats what got me. hope this helps someone

[@Sabbir-ln3bx]

how do you use it with LEDs?

[@Science.Buddies]

Please see our Arduino tutorial playlist which covers LEDs: kzbin.info/aero/PLlBVuTSjOrclb0iCMSRpS_H1lSrlSVeEm&si=cyCw5jX3CNvyX5me

[@Sirrah1130]

@@Science.Buddies my brother in Christ you linked the same playlist that we are on and none of the videos explain how to use an LED in conjuction with the supersonic sensor lol

[@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.

[@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.

[@cal7772]

I am definitely failing this class omg

[@Howdy-Harry]

Amazing

[@SunbeamVaruna-ef3pp]

[@GrahamEisele]

Its just reading 0 for me.

[@Idontknow4]

you might not have the wires connected correctly make sure 5v in vcc ground in ground and that you have trigpin and echopin connected to the correct pin on the arduino to make it match with the code

[@seventeenshaun6424]

Same here. I have checked my connections and they seem to match