Using Rotary Encoders with Arduino

[@noobdernoobder6707]

Finally a channel that does not stall two sentences worth of information past the 10 minute mark to allow more advertising time, but straight to the point explains what has to be explained, and that's it. KZbin as it should have been. Thank you and well done, Sir, I learn a lot from your channel!

[@altamiradorable]

I'm far from being a beginner but I enjoy so much your videos ! It's a clean job ! The filming is excellent, the audio is crisp and your explanation is alway accurate and simple ! A real paradise for robotics enthousiasts ! Keep on the good job !

[@1973darrell1]

HI I am building a CNC machine can you help me to set up a code and what drivers I need or show me some codes to try it out with?

[@asapatheist]

the room noise cutting in and out every sentence I wouldn't necessarily deem "crisp"

[@WistrelChianti]

Yes it was good. If I could make any suggestions I'd say to avoid the "blue like" wire on the "blue like" background (or emboss it) and, when explaining the state detection, reference back to the signal wave form would have helped a little bit.

[@asapatheist]

@G Guest fine, yes, crisp, no.

[@vasantkerai6814]

Vasant Kerai from London, I am very interested with these projects many many of them being a electronics engineer for 40 years now retired, love to know arduino project more about kits available to assemble, to demonstrate and learning, please a list of many many projects available,and easy to assemble.my email [e-mail]

[@rogerbeck3018]

my 62 years have enabled real pleasure watching AND learning from your production - very many thanks; I'll be back

[@obviouslytwo4u]

The internet is great so learn about the true suffering of slaughtered animals that's if you really care about the planet

[@Heathmcdonald]

@@obviouslytwo4u dude, what about the suffering of PEOPLE? it takes a real sociopath to care more for a dumb beast than a being as complex as a human. Not to mention ppl smell so much better during sex than the equine verity you are fond of.

[@JonSpink]

@@obviouslytwo4u It has great recipes too.

[@coronelkittycannon]

​@@obviouslytwo4u what is your problem?

[@marcelbron6128]

As an avionics electronics technician I have to say that I really enjoy watching all of your very clear and to the point explanations. Keep up the good work Bill, it's really appreciated 👍👍👍

[@keyurkulkarni2417]

My grandpa has a difficult time figuring out if he has held his smartphone straight or upside down.. And then there is you who almost has technical knowledge to build a smartphone.. Hats-off to your explanations, better than most stuff seen on youtube..

[@RDarrylR]

I have to say you have some of the most detailed and well produced videos for arduino and electronics on youtube. I really hope your channel catches on even more and your subscriber count grows immensely. The majority of stuff you show i have learned from others before or on my own but you go in much more detail and i always pick up a few new things in each.

[@CarlosChavez-gs1ld]

I agree 100% with many of the comments here. Your videos are always straight to the point, little to no fluff, and easy to follow. Well done.

[@typheousvenom1335]

What a wonderfully perfect video. Clear, thorough, concise with no extra baggage. I really love your format. Keep up the great work!

[@Android-vi4ph]

Always i wonder how you teach like a 100yrs experienced in every project. Wonderful and crystal clear explanation. Thanks for all videos.

[@Rogueixpresents]

Man I love your videos. Thank you for your time, keep up the good work sir!

[@HardwareUnknown]

It's a bit ridiculous how much useful information is packed into your videos. I just watched the one on stepper motors, then this one, and already I feel I have a good enough understanding to get started with my own basic project. I like that you go through the theory as well as the application/code, both at a good pace. Every part of the video has a purpose, and I learn a lot from them throughout. Thanks so much for the lessons.

[@kineticpaintings]

Well done Bill. You are my go-to KZbin channel for arduino and motion control stuff. Your explanations and visual coverage of the topics are excellent and so helpful. Many thanks for this one, just needed to get get my head around rotary encoders for a CNC mill that I have been rebuilding.

[@dougb1542]

Hands down the best channel on youtube for electronic tinkerers! Your videos are very well done. Clear and concise explanations are so helpful to a person wanting to get back into electronics after several years. Thankyou Sir!

[@brandonmakridis1565]

This video is a great resource, but I would like to point out a couple things that people might get caught up on if they try to follow along. The CPR value for quadrature encoders is typically for reading rising and falling edges on both encoder channels. So, if you are only using 1 channel and only looking at the rising edges, you will probably need to divide this value by 4. Also, most encoders are directly reading the motor shaft and not the output shaft of the gearbox, so you will need to take into account the gear ratio when calculating the RPM of the output shaft (e.g. if you are using a 30:1 gear ratio, the motor shaft turns 30 times faster than the output shaft of the gearbox).

[@artthurman3446]

Nice job. Just what I was looking for. I am a newby Arduino project guy, but have been in manufacturing control for 35+ years. Concepts easy, hardware/firmware constraints require learning. Fun! I am building a wooden boat with Arduino control of throttle and steering. Not a model...it is 16 foot. I want everything super light weight. Your videos will all help.

[@captainpugwash4100]

You are right about jamming the rotor too often, but we do this every day as part of the Factory Acceptance Test on large electric motors. It is called the “Locked Rotor Test”. The rotor is clamped to the housing and the motor is powered up to full power for a second or two, and then the internal insulation is checked for shorts. But we only do it once per motor!

[@saturdayscience5540]

No doubt I'm not the first to mark a slight error; at 20:20 you say the phases are about 180° yet they are 90°. I really enjoy your videos; thank you for taking the time to prepare, record and share these videos.

[@naboulsikhalid7763]

as usual, a great explanation that makes electronics and programming easy. Thank you very much for helping me to evolve, to become well educated. No price will be enough.

[@dryan8377]

Thanks for this. I've been out of arduino for about 10 years now. Did some huge projects (17 code pages+) back then. This was very helpful!

[@alfredocliftong4376]

Realmente es muy buena tu explicación. Lo mejor es tu inglés ya que no es necesario traducir para entenderte. Your explanation is very good. The best thing is your clear english since it is no necessary to translate to understand you

[@RickSaffery]

Sir, your channel is increasingly becoming my go-to resource for all things Arduino and ESP32! Your excellent content and outstanding production value brings me back for more. You're top 3 trending towards #1.

[@gangleweed]

I'm not into Arduinos or Pi' s but I still found it very interesting on how to control a servo motor in precise steps.......this could lead onto another interest if the yen for more projects gets into top gear and I might yet get an Arduino to learn more. I have to say that the video was very well spoken and extremely clear and to the point with exact placing of the various components and the results of the variations.

[@EsotericArctos]

I always enjoy watching your videos. They are well presented, explainations are given, without too much waffle. Easy to understand for newbies and those wanting to learn, but equally enjoyable for more experienced people as there is no waffle to detract from the content. I hope to see many more videos from you as all that I have seen so far have been of very high quality.

[@DiscoverRajivVlogs]

It's just basically 2 switches left and right also one for middle switch. Only difference is that it rotates, while switch needs to be pressed. Good job.

[@NathanBuildsRobots]

Great video, just what I needed for my balancing robot. I like how you added real world examples of rotary encoders in things I use every day.

[@memylastname9972]

Another great video. I love how clear your wiring diagrams are. Thank you.

[@robytryall]

Awesome tutorial! There is only one thig I want to point out, for people who use only the rotary encoder without the pcb module, you need to have pinMode, inputCLK and inputDT set to INPUT_PULLUP, otherwise it won't work.

[@mcotherman5957]

Great job with the production quality! Your videos show you put effort into your work!

[@teodorpironkov4589]

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[@RickSaffery]

Your videos are terrific! It's a combination of your informative content and superb delivery that make for a compelling channel. I'm excited to view them all, past, present and future. Please keep them coming!

[@ZhaoGongZiDepcb]

Thank you very much for your detailed sharing. I have been working on a project related to encoders recently, and this video is very helpful to my project.

[@fernandolobinho2752]

Hi, thank you for this intuitive and useful video. It was my intention to use a pot and "AnalogRead" input to generate decimal numbers but as I've for long time a encoder so let me play with it, ;) Many Thanks

[@dasficus]

You remember my electric engineer Teacher, good explaination and plenty of passion ...

[@danielvanschalkwyk3749]

This is just what I needed to see for my Mechatronics project. Thank you so much for the brilliant video.

[@northshorepx]

Wow Mark, that's explained exactly what we need to control the robot very well.

[@benhurvillarcanal]

This is a lecture of how to lecture. Great video. I'm glad I found it.

[@chrislusbytaylor3197]

You detect a rotation only when the inputCLK pin changes. You could also test the inputDT pin to see if it has changed. This would give you twice as many detected rotations per revolution which, in many applications, would seem preferable. The logic is only a little more complex. You have to record the previous state of both pins and enter the pulse routine if either changes.

[@boontecklee592]

You are absolutely right and it is good you brought up this option. But it should be trated as a special case when you want to detect input changes faster than the clock speed. In most cases, it is unneccessary, as it will consume extra processing power of the microcontroller, especially when you may want the controller to handle other functions.

[@dougsteel7414]

They're really useful for when you want to externally influence a user parameter - I realised this making a midi CC device, where values are set from a document, and you want to make deltas . Otherwise you need motorised pots which cost a fortune

[@uriahfindley6231]

thank you for teaching me step by step how to do this. excellent video!

[@mpsadre132]

This video is still relevant for newbees like me, thanks.

[@victordanielcorrearamirez9390]

As always, good explanations and good ideas for our projects. Thank you so much.

[@DaruoshAghajaney]

Nicely presented video and enjoyable to watch even for someone who is experienced and watch it for fun. However I was expecting to see how to handle the rotation when MC is busy with other stuff like reading other sensors or adjusting different motors speed. Interrupts are very important part of driving rotary encoders and I hope you cover them in your future videos. Thanks again.

[@imappami]

I agree. The microcontroller is busy all the time checking for changes in input. A better approach, using interrupts, can be found here: kzbin.info/www/bejne/enOQnXaDr9yiaKs

[@pauljs75]

I like the ones that function like jog-wheels with a momentary push button. Pretty good at doing complicated UI stuff with minimal interface, but not pushing a button 500 times or holding one down a button that has some kind of acceleration that always overshoots. Something seen in the better designed car stereos, but seems less common in other stuff.

[@Vikijangir]

Great job Sir, no word to appreciate your work. Thanks, for so much informative and clear tutorial.

[@ismaeeladebayo3663]

this is my number one youtube channel. good job sir

[@fantasticphil3863]

If you set up the code to detect changes from both the CLK and DT inputs, you can double the resolution of the rotary encoder, at the cost of simple code.

[@mjwalter2537]

Have learned a lot DroneBot Workshop! Building a animal feed mixing system now.

[@kennethpetersen8912]

You did again I love your videos I've learned a lot from Bill. Great job

[@baxtermoonga9145]

Very clear to understand ❤❤💯

[@infinytower3317]

As always, super great educational video! Thank you so much! 👍👍 🙏🏻🙏🏻🙏🏻

[@kimkouki6804]

thank you for your videos , it is very explicite , please do much videos like this

[@goddlediddles]

I have watched most of your videos, and I have to say they are absolutely excellent - they're clear and very detailed. You've made me very enthusiastic about using Arduino. I wonder could you answer an important question? When controlling a stepper motor remotely, how long can any of the cables be, either to the motor or from the rotary encoder. I need to remote-control a stepper motor from a distance of 15 meters. Many thanks, goddlediddles.

[@omarherrera1786]

First time here and this is a golden channel. Awesome video

[@ranaimran5387]

Your every video is informative and i am very thankful about your work,please keep it up

[@michaelhawthorne8696]

Nice video as usual...very polished with clear and precise graphics...

[@DanielStJohn-hc7mh]

Great Job! You are outstanding. It was hard to find where to start. You make everything so simple. Thank You.

[@IvoBallie]

Great educational video. It would be nice to see a sketch using the rotary encoder to control the speed of the motor instead of the pot.

[@user-cf5ev3pp9o]

Any advice appreciated 👍

[@Zorgens]

Awesome.! So clean. You are one of my favorite channel.

[@trespatterson7521]

I instantly subscribed. I've been looking for a channel like this!

[@suraiyaanjum2907]

Also check paul McWhorter channel

[@gabrielesabbatino2460]

Great video and GREAT explanation! Amazed! You got a new subscriber from Italy :-)

[@Dasgath]

the second code you have published in your webpage for this lesson is missing a { at the "void loop ()" line

[@sandyjohnston9457]

thankyou

[@drewkryger1102]

your videos are so well put together

[@SpeccyMan]

At 20:21 the phase difference between the signals is 90 degrees and not 180 degrees!

[@Marva123]

I thought that as well. I guess he is just considering the time when the pulse is high, which would make it 180, but if you consider the time the pulse is low it would make it 90. Since this is a digital signal and not an analog signal that is continuous, I'm not sure if you account for the time the signal is off as part of the phase?

[@SpeccyMan]

@@Marva123 Simply put, if the signals had a phase difference of 180 degrees then they would mirror each other on the x axis. Phase is taken over the entire cycle of a wave.

[@Johennessy]

it must be 90° since thats how every stepper works. He ment 90° but if u rush trough it so fast u can mistake those two.

[@alejandroleon3170]

Great!!! This is the best channel I ever experienced!!!

[@isidorovazquez6968]

Love your videos and for sure they inspire me to create something else! God bless you!

[@sLazar5520]

I'm about to give up on electronics, everything I make goes wrong, I made this circuit checked ut over and over, it counted down instead of up and only went up in twos 😢😢

[@sammflynn6751]

Sir, your videos are always a pleasure to watch. They are very informative. I had a question. I have 4 rotary quadrature encoders with 2400 pulses per revolution and for my use case it is essential to use them in this high resolution. My question is what microcontroller will be best to read these pulses. If I use ardunio mega, It often fails to count pulses at high speeds (around 1000 rpm x4 -> 160,000 pulses per second).

[@stevenq4859]

Any kind of delay completely ruins this code for the first example, if it misses a step it is just as likely to count backwards as it is forwards. You should make a tutorial for using interrupts.

[@MrRoman238]

Nice video, I've enjoyed. Thanks a lot.

[@dgb5820]

You make the obsolute best videos on youtube

[@TheRokkis]

Your voice is the best ASMR =D

[@jerrysmagic007]

You would have an aneurysm if you saw the mess in my work shop... ... nice videos by the way

[@Nutshell_In_Chains]

Thank you for the clear explanation in your videos. At 14:15 you mention to connect ground of the power supply to ground of the arduino and that it is an important connection. Why is this connection necessary and why is it important?

[@patwicker1358]

Same question.

[@TheUnofficialMaker]

@@patwicker1358 to keep the noise low

[@sd4dfg2]

When a power supply says +6V volts it just means 6 volts higher than its ground, it's a relative value not an absolute value. By connecting all your grounds together you now know that the positive side of your +6V supply really is only one volt higher than the +5V pin on your board.

[@Nutshell_In_Chains]

@@sd4dfg2 thank you

[@ChristianRThomas]

The quick answer is that it keeps all the grounds somewhere near 0V so that the the 0s and 1s fall within the logic ranges - which are pretty easy going as to what counts as a zero and what counts as a one. A more important factor is that multiple supplies are being used and (mostly), these ultimately go back to a transformer. Transformers float unless one end of the secondary(ies) is attached to ground. That floating can be pretty high - I have heard of differences of 60V between components - so if you pin one side of your transformer, and say, the negative of your battery each to ground then you won't get 60V being dropped across a bit of cable. When you look at the problem in detail it's surprising how infrequently the problem actually arises (or how infrequently it burns down houses) but it is potential pitfall where high currents are being drawn.

[@VanDerLaars]

You are an AMAZING teacher!

[@garysenier2440]

I have a question. Why does the inputCLK 4 and inputDT 5 have to be #define instead of just like you would normally do an input i.e. cont int inputCLK = 4, and cont int inputDT = 5;? As the others have said your vids are the most well explained and illustrated. Thanks

[@markvreeken]

Excellent information. Thanks will help me to tackle an upcoming project.

[@alexkart9239]

Bad idea to use the "digitalRead" command for this purpose. You should use the interrupts to be sure that you don't miss the sensor pulses.

[@gfilippou]

Interrupts will only work in cases you want the rest of the code paused while moving the encoder. In some cases that would be the better solution, in others not so much however. I built a macro keypad using this encoder and implementing interrupts for the 2 encoders I have would render it effectively useless, as whenever I turned the knobs it would miss any keystrokes. However encoding for motion control interrupts would be best. But I have to agree with the presenter, digitalRead is the best well rounder for an introductory tutorial like this

[@alexkart9239]

@@gfilippou totally incorrect thesis. Even if you implement the keystrokes processing with continuous polling (which is bad idea itself), there is no any problems coused by the interrupts, because "pauses" are incredibly short. You can lose the keypress event if only its duration was about 10us or even less, which is impossible for the human hand. If you having a long pauses and problems with each interrupt, you probably do it wrong.

[@phillyo51]

@@alexkart9239 Your spelling is completely wrong.

[@alexkart9239]

@@phillyo51 i'm sorry about that. English not a primary language for me.

[@orange_tweleve]

As long as you don't use delays in the code it will be fine( loop cycle on an arduino happens fast enough ). Interrupts are better but not necessary.

[@3nagib]

Another great episode Bill.keep up the great work

[@TomLeg]

The encoder waveforms 20 minutes into the video are 90 degrees out of phase, not 180 degrees

[@David_11111]

subscribed to news letter .. now going back to explore your site.. Thankyou.

[@foldi001]

Tolles Video!

[@damithsm1980]

You make everything simple...Good job..Thank you very much...Love it...:-)

[@simonabboud5987]

I have enjoyed your style of teaching

[@Farm.Modern]

thank you, your videos really helped me

[@ChristianRThomas]

Those waveforms aren't 180 degrees out of phase, though it's an easy mistake to make. They are 90 degrees apart which is why, I guess, it's called a quadrature encoder. I haven't gone back to look at your code but I think that fact is how you can tell from the states of each, compared to the previous, whether it's going CW or CCW. I'd need to think it through, but I don't think you could do that if they were 180 degrees apart.

[@SamPusegaonkar]

Hey, Can you make a tutorial series on ROS? Thanks! P.S: Keep up the good work

[@belenhedderich3330]

Hi I sould have loved to see the use of the encoder with doing menus for arduino

[@CONNIEMALAN]

Thanks for another super video, top quality !!!

[@tomsunnex7215]

Another fantastic tutorial

[@electronic7979]

Useful video 👍 very good

[@baghdadinstitute4672]

Great Channel... Thank you very much.

[@osmantoprakoglu5040]

Perfect lecture, thank you.

[@kwikb]

I agree completely. You could make a video on how to make great youtube tutorials. excellent

[@camicar2698]

Gracias por el video amigo, Saludos desde Colombia

[@ovidiurosu6632]

great job, thank you for yet another very informative & clear video

[@adamjames8546]

Boss, love it

[@wishicouldarduino8880]

Learn something every time I watch this its like nasa

[@azyfloof]

Excellent excellent work, Bill :D I love that you covered both regular and interrupt decoding! I've used very similar code to the first one with no interrupts, and I couldn't quite get it to work right. if I turned the knob slightly in one direction, and back again, the counter would only increment or decrement, but wouldn't go back. I'm wondering if it's because I chose to use pull DOWN resistors instead. I thought I changed the code satisfactorily to reflect this, but it seems not! You code using pull UP resistors on the switches seems to work really well and no miss steps. So I think I'll rewire my circuit and try it :D Also rotary decoding that doesn't use interrupts is PERFECT for things like servos, which interfere with interrupts anyway.

[@Wawawy1994]

Hi, PID motor speed control using encoder will be interesting :D

[@HierNameneingeben]

i want to see that

[@ahmedgaafar5369]

you are a great teacher Sir.