LESSON 28: Tutorial for Programming Software Interrupts on Arduino

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This lesson shows you how to take your Arduino Projects to the next level by learning to incorporate software interrupts. You can find the code and links for this lesson at:
www.toptechboy.com/arduino/ard...

[@Fogaata]

Master of Masters, great patient delivery. Thank you for extending a hand to us beginners. Much appreciated.

[@prathameshbarik]

That's really amazing teaching. Thank you so much. I had difficulty understanding this concept from a very long time. Thank you.

[@bassman2162]

I watched the 68 lessons on the Arduino. I looked at this group of 36 lessons and thought it was a an old duplicate version of the 68 lessons. Boy, am I glad I decided to go through these as a review. There is so much more to learn here. I hope others will see this and not make the mistake I nearly made, skipping these 36 lessons.

[@robertpendergast2620]

Another excellent tutorial. I enjoy your excitement when the sketch works too.

[@user-st1ml9rl6b]

I feel so grateful for his awesome video and he's so passionate about teaching useful things even though he doesn't really have to. I can also learn that kind of things from his tutorial

[@BRIGHTLIGHTSIDE]

Paul, thanks a lot for sharing your precious knowledge. You're a great teacher :)

[@richardankur3703]

Sir keep posting your video. Your lessons are the best.Love from India

[@paulmcwhorter]

Will do. Thanks for the kind words.

[@abbasahmad9681]

Sir i need help plz reply me its about arduino timer interupts

[@waynewelshans1172]

Paul, fantastic video series! Happy to see you back (without the cough;)) and keep them coming! 2 big thumbs up from me

[@andrewferg8737]

Great lessons. You've really helped me progress in Arduino. Thanks!

[@ryansfamily]

Thank you! I watch all your videos and have learnt so much.! Please keep posting these

[@siddheshgawali7764]

appreciated that u are showing steps for downloading and installing library

[@1DR31N]

What a great explanation carried out with patience. I enjoyed it a lot.

[@danjunk-DIY]

Now I understood the actual concept of an Interrupt ! I did it on my Arduino R3 just now. I am thrilled.

[@lucamorini4072]

Mr. Paul, really tahnk you for your help! In this quanrantine I have learnt so many things thanks to you!

[@WaqasKhan-nd6sj]

Really a next level ......much improved and step to better performance and accuracy. thanks Mr , Paul.

[@dirtycrazy1361]

Best video lesssons ever. And hoping more lessons from this playlist. Sir, keep uploading and we are pleasant be your students!!!!!

[@Marva123]

"Look at that, BOOOMMM, we programmed an interrupt", love the enthusiasm.

[@yuriu8]

OMG Paul. mate you nailed it. It's amazing how you explain this I read a lot of articles and watched a lot of vids buy how they explain is absolute rubbish. it like I am an expert they expect me to know everything before I watch the video. Yet you explain it in a very understanding way thank you.

[@loptica62]

Now this is what I've been waiting for! Great stuff!

[@rodnolasco]

Sir, two thumbs up. The best ever explanation. Thank you so much!

[@aberateklehaimanot9804]

Thank you very much Sir.Your tutorials are the best.Thanks again for sharing.

[@TheZooman22]

Thanks for a great lesson. That worked out very well. I needed a quick overview of interrupts for an extra credit project in my class.

[@paulmcwhorter]

Glad it helped!

[@barunbasnet]

Always come back to Paul for the basics.

Very good and thorough tutorial on software interrupts -- big thank you!

[@TonySwitzerland]

Excellent tutorial, clear language (perfectly understandable also for non native (E-) speaking folks). Thank you so much!

[@lhoussainhamadi8414]

Thanks for all the courses you're providing to us.

[@paulmcwhorter]

Glad you like them!

[@RishabChouhanFilms]

Your lessons are the best sir.... Plz dont stop.....

[@bunberrier]

Nice! My appreciation for Arduino continues to grow.

[@patfacunla1687]

Actually Paul, I have a stumbling stone for years that I am trying to solve. Now that I have seen your video I myself cannot believe that it is this so simple!! Booom thanks for teaching paul !!!

[@ramink1990]

thanks for sharing, the world needs more guys like you.

[@First.Last.99]

Amazing intro to the cideo! For real, learned so much thank you

[@rho35100]

Hi Paul. Glad to see you are back in to the Arduino tutorials. I will need to pick that up my self again

[@paulmcwhorter]

Yes, I have spent some time on the CAD software. I really think being able to design and print mechanical things for our electronics projects is a cool capability. So, I dont think time on Fusion360 was wasted. Hope to do a little more Arduino now.

[@rho35100]

Paul McWhorter . Absolutely right The fusion 360 lessons where great and now I don't use inventor anymore, only Fusion360 , I even bought the License because I use it at work . And bought a 3dconnexion 3dmouse to work with it. Best thing ever

[@EddieFox]

@@paulmcwhorter Hello. I enjoy your videos and I merely tinker with code, knowing not even the basics really. I'm asking if you would consider helping me with some code? A friend asked me to build him a speedo for his model boat racing club. Like a fool I said, "yes" but I couldnt tell you how many rabbit holes and dead ends I've been down. I've finally found a code that sorta works but won't quite fit my (our) need. Part of it is to do with interrupts which I'm just not bright enough to sort out. I won't give the code or problem here because I ask politely and await your reply. (I've some technical knowledge. Check my channel if you have time.). God bless you anyway.

[@DucatiMTS1200]

Many thanks again Paul for an excellent education video. I'm starting to really enjoy all these videos. 👍👍

[@320mb]

We are out here, I'm glad to have Learned more about Interrupts..... I played with this Sketch and had one Led blink at 1.5 seconds and the other blink every third of a second... Oh and I did use a variable for the delay as learned from newer Lessons. Thanks

[@santoshkawale21]

Heartily thank you Paul McWhorter :)

[@Sinister_Reaper]

Best teacher ever, i've spent months and months trying to learn programming and have watched hundreds of videos and i learned more in the past 2 days watching your videos than i have in the past 4 months, your videos are much appreciated!!!

[@paulmcwhorter]

Happy to help!

[@Sinister_Reaper]

@@paulmcwhorter i had a couple questions about a project im working on to build an ecu for my grandpa's truck he passed down to me, the ecu was water damaged and i havent been able to find any companies that were able to rebuild it. I feel i've got the injection side of it worked out but the injectors run on a hydraulic system that runs off motor oil, there is a high presssure valve that feeds the injectors and runs off an icp sensor that regulates it, i know the factory bases the pressure off of rpm, on cranking it requires 1v and from the valve should make 250psi and at idle 750 psi and up to 3000psi at redline, i was wonder how i could do this based on the cam hall effect sensor? I'm struggling with figuring out how i would program the variables

[@franciscalderbank8623]

Thanks Paul for an informative tutorial. Subscribed.

[@TheJavaSync]

I come across your video very late, sir, since I'm just hobbiest (not real programmer), your teaching is very awesome, Thank You very much

[@AshutoshSahuMRM]

Thanks sir, for such an easy to understand explanation

[@anwertalibakraa748]

Thank you Mr. McWhorter , This was Helpful and all your lessons Helps me out , Keep the GOOD WORK ^.^

[@surajd2366]

sir, thank you for continuing the playlist. pplz keep posting your videos.

[@great136]

sir we love your teaching,i first learned arduino from you,sir pls teach us to the end of the arduino,god bless u sir

[@zalllon]

Really good teaching and explanations, I enjoy the way you present the information. I realize this video is quite old now, but I only just started getting into Arduino as of three weeks ago. Before that I hadn’t even heard of it, and I’m only familiar with programming because I use it in Microsoft excel in Microsoft access.

[@studentofedison421]

Hard topic explained in a crystal clear way, thank u so much

[@paulmcwhorter]

Glad it was helpful!

[@sourabhsharma9070]

hi paul!.. LONg time........ur tutorials are the best on youtube.,and plz keep making them.

[@jaccosam]

Thank You !! Great lesson. Please continue.

[@Thefarnworth1]

A most excellent tutorial, once again thank you.

[@tinnguyen1375]

This is exactly what I was looking for the last few days!! I was wondering how to dim the different colors of the RGB Led independently, so the color change randomly. Thanks!

[@michaellmanashrove2615]

Thanks for all the hart work you are one of the best teachers Keep going with the good work

[@dmeadows11]

The Best of all the internet and that is big, These lessons are just Fantastic

[@MrKvarkk]

Paul, thanks for your great work. It would be great if you shoot a series of lessons on low-level Arduino programming - working with port registers, hardware timers etc. I mean direct Atmega registers usage, without any libraries.

[@alejandroperez5368]

Great tutorial, keep making more Arduino videos please!

[@AliRashidi97]

That was great!!! I suggest you add these few final lessons to "new arduino" playlist.

[@supersuperintendant]

My favourite teacher on KZbin :)

[@peterryder7874]

def giving this a thumbs up .. well done

[@paulmeistrell1726]

Thanks for the lesson Paul. Introduction to another #include!

[@christianhdez]

I like the way you teach, thank you.

[@alanlacey9437]

You Sir are a great teacher

[@kavindugilshan]

super clean explanation thank you sir !!

[@sameerk12982]

Thank you Sir for this helpful tutorial...

[@andymouse]

great stuff Sir !...……..this has got me thinking...……….cheers

[@srinivasprasanth8703]

thanks for your excellent explanation sir.

[@soloveyandriy]

Hi Paul, Thank you for your lessons! They are the most comprehensible tutorials on Arduino that I`ve encountered on the Internet so far. I feel jealous of your students :) I have a question on this one. How many interrupts can we use in one an the same program?

[@Steve-GM0HUU]

Very informative - thank you.

[@zekeriasvarg530]

I like using millis() and do the thinking from a-b my self to not get confused , but I understand that people like to put in librarys.

[@gfodale]

@ 15:26 you state that void denotes a function. In truth, void denotes that the function has no return type. The parenthesis after the function name is what denotes an actual function.

[@richardalford1740]

Is this part of a HS class? Damn, may need to go back to HS. lol. Have EE degrees and spent my career as an applied mathematician in Geophysical Research. Watching this series I'm beginning to feel like an EE. lol. Keep up the great work. It's a great time to be alive.

[@imretoth8150]

me : Oeh a new Paul McWhorter vid, automatically checks it out

[@kashifnoori6834]

Amazing 👌! Love from India 💞

[@mtzmechengr5781]

Nice explanation!!

[@gabrielefugazzi579]

Amazing lesson

[@maniacatthecontrols]

Thank you this should help with what I want to do. I want to monitor a battery charger. It has a slow flashing LED's to say it is charging a battery but it flashes quickly if the battery is not charging. If it is not charging, you usually need to disconnect the battery and reconnect it again. Sometimes it starts to charge then gives up in after a minute or so. Then you need to try again and watch it for a while and see if it's going to keep charging. Sometimes you need to disconnect and reconnect the battery a few times before it will charge so I thought I'd use an Arduino to monitor it for me and a relay to disconnect and reconnect the battery. Then maybe add a sounder to say when the battery is charged when the LED stays on. So I'm reading what the LED is doing, rather than writing to it but I think I can work out how to do than from your videos. Thank you very much.

[@alexk6585]

Salute to the gentleman! Makes it easy to understand! Any chance you can do a lesson related to blynk(app) coddling?

[@jenniferw8963]

1:45 you could set the delay for 250ms (instead of 1000ms) for the yellow led and use a counter variable for the redled. Increment the counter every 250ms. Once the counter reaches 4 you'd turn on the red led and set counter back to 0.

[@MadMrQ]

Really interesting lesson.

[@paulmcwhorter]

Glad you enjoyed it

[@engineereverything9055]

excellent video !

[@TimConnor]

I must say you seem to be an awesome teacher with lots of patience, keep up the good work

[@YouCanFixIt]

Thank you for taking the time to explain could you use this to grab input high or low from another pin to use as a trigger to turn off another pin. As opposed to using mills function.

[@davewreski6900]

Sinply put : Great Thank Paul

[@abdurrahmandogan621]

Very clear explenation...

[@jamesriopelle5197]

Thank you, prof. McWhorter. Trying to figure out relationship between LEDStatus ="OFF" and DigitalWrite(YellowLED, LOW); Also am trying to figure out how to apply these principles to my own mission--to program arduino to read time intervals between a series of photogates with intention of measuring rate of slowing (derivative of speed) of a ball that has rolled down a ramp onto a flat continuation of the track; comparing balls of different materials (densities).

[@toptechboy007s]

thanks you SIR Paul

[@davypeleman3672]

thanks very good lessons

[@billgaytes6845]

For someone is trying to learn 'C' after spending decades in assembler this is the best tuition I have ever seen.

[@hobbytronix]

Hai sir

[@erygion]

Great video Mr. Mcwhorter. Learned a lot, software interrupts are fairly new to me. Only thing I'm confused on is do the two loops run one after the other (linear) or separately in the code? Can two loops run at the same time ( I know arduino only has one "core")

[@mechsparks]

Awesome video 👍

[@Skilteskoven_Decal]

Keep up the good work :-). Suggestion: How about replacing all the code in your interrupt routine with this: digitalWrite(YellowLED,!digitalRead(YellowLED)); that would make the code a bit shorter :-)

[@nischalsehrawat2130]

Hi Paul, Can you make some videos about sensor communication protocols like I2C, UART, Single wire communication etc please?

[@Fernando53RJ]

Good Job! Thanks a lot!

[@paulmcwhorter]

Glad it helped!

[@ingeborgsvensson4896]

Great video, thanks. What if the main loop generates a for example 1 kHz PWM signal, will the interrupt cause it to slow down a little causing it to become effectively 998 or 999 Hz for instance?

[@bassman2162]

I am interested in setting up a weather station using the Arduino. I had wondered how to get events to interrupt the main flow of the loop. I can see that I will need both software and hardware interrupts.

[@reneg5325]

would be nice also to get the info how to use a new library, how do we know what instruction is supported by a new library

[@lamorimferreira]

First of all my congratulations for your videos! I have a question, why there isn't a return in the second IF from the void BlinkYellow function, it returns automatically?

[@danljohnston]

Hey Paul, Using a Nano, can I have 2 interrupts at the same time? I want to get 2 RPM reading using Hall Effect Sens. Thanks for making these videos for the Adruino. Great for us who will never be "programmers".

[@EverythingPianolla]

THX!! :D

[@TheVaskrsija]

Turning two ore more LED's on/off simultaneously, by using only delay, it's not complicated, it can be done very easy, so for this purpose, we don't need to use interrupt at all, but I agree, sometimes they can be very useful. Thanks for the video.

[@anuragagarwal5480]

Why does the yellow LED keep on toggling even if it is present in void setup(). Why don't it after return statement, go to the void loop() and continue its execution there ?

[@ashkannikfarjam9631]

Hi I really like your videos. I was wondering if there is a way to have timer1 constantly running?

[@VipinKumar-mf5lv]

Sir, can more then 1 interrupts can apply in single Arduino program. The code you write use of single interrupts to blink a single led. If I want 3 to 4 interrupts led ON and OFF along with main loop running. Interrupts can work.

[@tobechukwublessed4274]

Hello Mr. Paul, thanks for your video. I've been searching for this, and it really does help. But, can I still use this approach to control three different actuators (one servo, one linear actuator (through 4channel low trigger relay) and another DC submersible water pump (through 1 channel low trigger relay). I'm seriously trying to figure out how to control these actuators simultaneously. It's definitely going to involve hardware interrupts cause, the sensors attached to these actuators through the Microcontroller (nano) will change state occasionally. Could you assist me, if you've gotten a grasp of what I want to do, I'd really acknowledge that!