Get Started with Ultrasonic Sensors and Arduino: Step-by-Step Wiring & Code Guide

[@bobrowland6936]

Back in 1985 I built a robot with a rotating sonar system, using ultrasonic transducers very similar to those used today. While rotating, the sonar was pulsed once every degree. Over one weekend I spent a lot of time testing my sonar with my head a few feet from the sonar system. I had no idea that a 40KHz pulse, which you cannot hear, could damage my hearing, but that is what happened. In one weekend, I permanently damaged my hearing and it has only gotten worse over the last 35 years. Later I calculated the SPL (sound pressure level) of that sonar’s output pulse from the amplitude of the signal and its data sheet. I found the sound output of that transmitter was about 125 db. On my current robot I have three HD-SR04 boards which I use for collision avoidance. I measured the amplitude of the transmitter signal and from the 40T/R transducer data sheet I calculated the SPL of the 40KHz output sound of the HD-SR04 to be about 115db, which is still loud enough to damage your hearing. So please keep your head far away from the front of the sonar board.

[@RachelDeBarrosLive]

Great tip! Some people have said that their pets don't seem to like them either. Luckily all my projects are in the garage!

[@TheUnofficialMaker]

sure it wasn't the rock concerts?

[@phtskllz]

Wow I never imagined it would be so loud, that would be nearly as loud as a jet fighter taking off of the runway.

[@joshmack4312]

Hello, Ive been watching your videos and feel like I could really use your help on a project. I am a very beginner. Id like to use the motor cards you mention or something similar to control some small 12vdc motors. But I need it integrated into an hmi screen instead of the arduino. @RachelDeBarrosLive

[@thatboy799]

Was literally hoping you'd do do a project with this because I want to use it. Thank you, love your channel!

[@indiedavecomix3882]

I'm just getting started with arduino (my first kit arrives today!) And I'm already planning a mousetrap box using these sensors, some sort of door closing apparatus, alarm and light. Big project for a 50 year old who's never coded anything in his life. 😂

[@ronaldcarey5708]

Rachel...I subscribed for the content, but I stay to soak up your boundless enthusiasm!

[@Thunderbyrd.]

What's up Rachel ! Loved watching you fixing cars on tv, so glad you have this channel!

[@PRR5406]

Rachel: This was the best tutorial I've had thus far. It was useful, well explained, and you shared the code while I was following. I'm a retired teacher, and this is my style of learning. Please slow down your dictation by a few microseconds (see, I learned). I am very anxious to learn more using the UltraSonic sensor.

[@miketrissel5494]

Much better video than the last one I saw. Easy to follow, good continuity. Good reading rhythm😀👍👍. You could tell you put a lot of time in the prep work, to help us follow along. Mike

[@gamingwithtasir581]

I don't know why you have low views your video's are so helpful I'm beginner but understood it easily. I hope i could access your live workshop.

[@SwatiMathur-zs3rs]

this is the best arduino video ever!

[@shakejones]

another brilliant video, cheers mate!

[@jaykay2349]

Your videos are so easy to follow and you make things so easy to understand. Could you do a video on relays?

[@jansmit4628]

The very first setting of trigPin to low should only needed to be done once, so could by just in fron of the loop. This saves some processing time.

[@ShefaliE]

I love watching your videos, they are easy to understand, even though english is not my mother tongue. About the last question, I have a bit of a fun example, it's from "My little pony", in the episode "It's about time". Loved watching MLP with my daughter, now she is more into games, which is equally good. 😊

[@stevendemonnin2025]

Thanks!

[@RachelDeBarrosLive]

Thank you so much! So kind!

[@Hamster-but-cool]

Your such a great teacher❤

[@airhammer6203]

Check out this nerdy information from this gorgeous lady. Rachel , you're doing some nice work, as always. Proclaims aside, notwithstanding one way or the other, I've enjoyed your work over time. Years later, I realize I may have missed something, but I'd like to see you vroom vroom again. AirHammer out!!

[@abualbushribrahimhusseinmohame]

Awesome as usual , thank you for the effort😍

[@RachelDeBarrosLive]

Glad you enjoyed it!

[@Byt3me21]

Ok I subscribed for your positive energy and apparent skills.

[@RachelDeBarrosLive]

Thanks for subscribing, I'm happy to help!

[@norahalanzi2269]

Thank you Rachel 🙏🏻❤️❤️❤️❤️

[@steverileyretired]

Thank you very much, always wondered how it worked

[@scottkrieman8108]

Rachel I just found your channel and love it! Someone told me I need to use an Arduino board for a project I'm trying to build but I don't know how to program one to do what I need it to do. I have a 12 volt DC motor I need to make turn on for three seconds and stop for five seconds then turn on in the opposite direction for three seconds and stop. This is for a slingshot auto resetting target I want to build. I would like to know what Arduino board to buy.

[@andreaswolfesberger6140]

always love your videos - thank you

[@RachelDeBarrosLive]

Glad you like them!

[@stevendemonnin2025]

you are so much fun! Even when you send me back to High School.🌹🌹🌹🌼

[@RachelDeBarrosLive]

Thanks for watching - now to find a new flux capacitor for my Delorean 🤣

[@graemebrumfitt6668]

@@RachelDeBarrosLive Colin Furze has a Delorean ask him, he's digging an underground carpark for it with a raising turntable! Colin is crazier than you in a wonderful way😊 GB :)

[@PRR5406]

Rachel, I am slowly dying while I await the next KZbin tutorial on pairing the ultrasonic sensor/Arduino with other functions. I have a project in which I wish to use the Ultrasonic to start Arduino to run a series of 12 volt LED signal sets (i.e. green, yellow, red). I need you next tutorial . I'd hate to break up our engagement over such a small thing.

[@Olli20084]

ey buddyboy, im the number 1 rachel glazer... iv'e been a fan since 2015 so you cant match me!! just hang up your boots punk!!

[@jamesmoon5632]

Love watching your videos well presented

[@RachelDeBarrosLive]

I appreciate that! 👍

[@scotthouston7873]

Can you do a video on how to make things happen in a range? For example I want my sensor to do something between 20-30cm and something else 30-40cm etc Thanks

[@bossdon8828]

Keep it up ❤

[@RachelDeBarrosLive]

Glad you enjoyed it!

[@JamesConway-s9q]

Thanks for your videos and they are really amazing anyway you must know your great with electronics.😇😍🥰👍

[@TheUnofficialMaker]

who wouldn't go back to HS if she was the teacher! great job. I tried this on my entry gate but doesn't work on detecting people.

[@RachelDeBarrosLive]

There are a few drawbacks to the ultrasonic sensor that I didn't go into in this video. I'm doing a another video on PIR vs ultrasonic sensor vs IR sensor to cover their pros and cons. Sometimes the ultrasonic sensor has trouble with curved or irregular surfaces. For a motorized gate, many people use an IR sensor instead. It goes LOW when an obstruction (like a person) is detected. You can use that to either pause the gate or make it open if it detects something in front of it. What are you trying to do with your gate?

[@paulkeenanmusic]

Fantastic video!

[@herrpriller9299]

Instead of using a breadboard, can I just solder the wires and parts?

[@PrinceBoji]

this is awesome

[@peterfireblade8120]

which library do you use ?

[@jackpenny8746]

great video.

[@graemebrumfitt6668]

Rite Rachel Dudess, Always knew this could be done just to thick to figure it out! 🤔 TFS, GB :)

[@RachelDeBarrosLive]

Happy to help!

[@ArduinoMind]

Can you make a transmitter and receiver with 0.96 inch oled display

[@dharmendrarawat784]

Which Arduino use esfasific no. Of Arduino

[@michaelgarcia5493]

Rock on 🤘🏽😎🤘🏽!!!!

[@warenmann1042]

To answer the question @15:04 about Future self going Back to past self with good news.. "Back to the Future Part II" when Biff goes back to take his younger self the "Grays Sports Almanac"...

[@creativeamar1611]

Mam do something with hx117 load cell

[@naeemhaq3504]

Nice video as always. Do you make video if I give you my content?

[@scottmerriman8549]

Great!

[@RachelDeBarrosLive]

Glad you liked it!

[@jimfrozen521]

Math class 1.5 x1.5 = one times one and a half times one one and a half lol love you

[@thomastegen8020]

Finally google Rachel because she looked so familiar. She was one of the ladies on three girls garage!

[@jyvben1520]

A millisecond is 1/1,000th of a second. A microsecond is 1/1,000,000th of a second. The ratio is 1,000 to 1. Therefore a millisecond is 1,000 times longer than a microsecond.

[@DBB-KE5DUO]

The downside to this sensor is the resolution! Lidar is much better for resolution, but the code is a lot tougher!! 😊😊😊

[@RachelDeBarrosLive]

I have to try that next!

[@mikebond6328]

I think of lie detector whenever I see Lidar. Like when we were teenagers my mom’s uncanny ability to tell that yes we had been doing things that we were not supposed to do last night.

[@DBB-KE5DUO]

@@mikebond6328 🤣😂

[@jimfrozen521]

🤔

[@kikinlozano958]

Haz otro canal en español. usa IA para traducir tus videos y así de fácil duplica tus vistas.

[@jimfrozen521]

Please ,play the violin again

[@jimfrozen521]

So sorry I was listing to CAT STEVENS Angelsea Don't worry Halloween is my Bag I still stay silent your phone booth said it al total class !