One of the most useful, interesting, and straightforward video. A hidden gem 💎

Hay Bruno! Thank you for actually explaining the code. You made a light come on as to using interrupts that I've been struggling with. Thanks,000,000 for helping me understand Arduino code better. - k -

excellent! It's very useful for measuring rpm

Clear and easy to understand video.

Wonderful video. We'll done. Great application of HALL sensor

la mejor explicacion que encontre, ademas fue entretenido y con ejemplos reales

Awesome! I will use this to build a windlass anchor chain counter for my boat :-)

I like your dedicated bread board LED with built in resistor and jumper lead extensions. I have not seen that yet. I will definitely be making one. Thank You. You get a Thumbs Up and a Sub for that!! 😁

Very nice! Very detailed and explained tutorial, easy to understand! Thank u

Thanks a ton for this video. The LED indicator trick helped me determine 2 of the 3 Hall sensors in my 13kw PMAC motor's Encoder circuit were bad.

What a lovely video. I subscribed and looked for any other video's because you are really entertaining and creative. And then I noticed you only uploaded three video's. I am sure people, including me, would really like to see more of your type of content. Cheers mate 👍

Thanks. Just used this in combination with a switec micro-stepper motor wired directly to 4 of the other pins so the same Arduino Nano now also drives a dial pointer on an antique RPM gauge for a hot rod. Whole assembly contained inside the original gauge housing, just plug in a USB lead for power from a phone power bank and can also use it for debugging. Really neat.

Great video! Simplest explanation of this use case.

I want to use a similar setup for a Arduino based RC car. Great video

I will use this knowledge for my HUD that i want to make for my car

Nice explanation...great effort..you are great.Thanks

This was very useful. Ive been trying to find out a way to convert one complete rotation of my stationary bikes wheel into 1 mouse click and this seems like a great way to do it.

Nice video, thanks for sharing. I was looking how those sensors are used to detect speed and your video showed it nicely. In the future, I would like to modify some organ pedals I have and somehow measure the speed that the person operating them uses to touch the pedals. This is translated as the volume of the note.

Thank you so much!

Awesome explanation of this particular hall effect sensor. This should get me up and running on a lathe I'm converting to CNC. ***EDIT*** It worked perfectly. I have one of these sending 1 pulse per revolution on my lathes spindle to LinuxCNC as my index phase since my encoder is mounted 3:1 gear ratio with pullies due to size constraints and not being able to fit another pulley the size of the spindle inside the cover. This resulted in the index pulse being sent 3 times per rev, which can't be corrected in the LinuxCNC HAL file. This worked out so perfect. Thanks for the clear details on everything.

Awesome video. A great help

Great video very informative thank you

Thank you for great tutorial.

Good Video. Interrupts on arduino are not my strong suit. Your explanation will help. I have some vintage dirt bikes that I would like to know the engine speed of and this is an excellent starting point. Thanks again.

You really did a good job on this video. If you'd like, I can give you some code that uses the input capture feature of the Arduino. This ability, takes snapshots of the timer register, every time the pin gets a pulse. In the ISR, it only copies the timer value to a circular queue, after calculating the difference from the last pulse value. This means the queue contains period timings, in microseconds usually, but you can get to about 125nS resolution, iirc. At main level, you just pull entries from the queue at your leisure (reasonably, the queue is only so big). The mathematical inverse of the period time is revs per second, just multiply by 60 to get RPM. These measurements are sub microsecond and perfectly measured by hardware, even if you're in the middle of another ISR, it still takes the snapshot right when the pulse edge occurs. Its a great feature of the atmega chips (and others), but the Arduino framework doesn't use it, because it precludes the use of a couple of PWM pins. If you can live with that, its the absolute best way to take precision measurements of pulse timings. Input Capture is the way to fast RPM updates and precision accuracy. Theres a little more to it, like it uses pin 9 for the input pulse pin, you cant change that. Timer overflows occur every 32mS, so that's handled by another ISR for really long pulses. The capture ISR factors in the rollovers when it's calculating the time interval since the last pulse interrupt. I wrote the code about 15 years ago, so ill have to dig up a copy. Its not much, just some register manipulation in setup() and some in the interrupt handlers, but its really small code and lets you capture pulses as short as 15-20uS, yes microseconds, not millis. delay() and millis() are okay for many things, but precision isn't one of them. Edit: I'd really like to see this method documented in a UKposts video, but I'm not gonna make one. 😊 I did it for some guy on the Arduino forum wayyy back. People rarely suggest it, though it's the most accurate way, and very little coverage of using it on Arduino exists on UKposts, that I know of anyway. I first did this with a pic chip about 20 years ago, to time mechanical clocks and watches. I wanted serious accuracy, and this is how you get that. I would be more than willing to talk to you about it further, if you're interested. For all I know you already know all this, but wanted to keep it simple, and I'm making a complete fool of myself. ;-)

Thanks for the tutorial, helped with my application, I was a little concerned when you fired off the mower with you foot partially under it though.

Good work I hope it works with me.

The Best!

Thank you for helping me understand, i am working on arduino with some sensors. But i got stuck in codes logic, your explanation help me understand everything. Lol Now i feel that have information sensor in my mind that illuminate with your video.

I orders 20 of these on amazon... I'm going to see if I can use a tiny rare earth magnet on my rotor in the distributer for the 3144 to detect. I want to datalog rpm but the MSD has a 12v tach wire

Hi Sir, can i just use 12V supply to the hall effect sensor instead of 5v?

Cool! Well done!

That was dead on. Mowers run at 3000 to 3500. Great video

Very nice video. It could have been a lot more exciting though... just after you started the lawn mower with your foot under it!

Hmm, very useful, but how would you do this without delays. I need to read multiple hall effect senors at a high rate

thanks for sharing

Can you use a pair of unipolar sensors to detect direction of rotation? I have seen/read about the arrangement of using two Hall effect sensors at a specific spacing on a ring of magnets (or ring with a circular pattern of N/S), but I’m not certain if this can be done with a simple unipolar sensor or something more complex

Hi ! Very creative demonstration congratulations. I am trying do use an inductor combined with 3144 to create an output when much than expected current flows trough this bobin . Initial tests (with a powerful magnet ,shows that minimum lag is 1,20 mseg wich is to long for my application ,Would you have some solution to minimize this time ?

Great video! Does anyone know what strength/type of magnet I should use? I plan to drill a magnet into a skateboard wheel to measure rpm

I find dozens of wiring diagrams for connection to an ardino but none for connecting to a mach 3 BOB, is that they cannot act like a Normally Closed switch, or they just don’t work on my type system. I really need a wiring diagram for my system. Thanks.

Hi this is perfect, however i have one issue with it. Since it only takes measurement every second it doesnt rly represent perfectly the actual real time spinning speed. And if i take a measurement every 0,5s then it wouldnt be accurate. So i was thinking, do you have an idea on How we could use this maybe with another hall sensor on the opposite side of the wheel so that we can take measurements more often ? And How would the code have to be changed if we added the second sensor. Thanks for replies !

What if I want a faster refresh as 1 second isn't that great, also what if I use more than one magnet (exactly on the other side of rotating thing) What do I need to change in code for that to happen? I plan on using 4 magnets and 150 delay seems pretty smooth, not sure about the mathematics on how to correctly change numbers

great video

Thank You, for the tutorial. Is it possible to measure the presence of 220 volts using the hall effect sensor?

Hello, thanks for the vid, would the sensor work if placed near a spinning 12v small motor ? thanks in advance

Excellent video, do you think such a component can stand a car engine temperature, in case i place it inside a car distributor ?

Nice!!

Does it matter which pole is facing the sensor? Will the led light up no matter which pole is facing sensor?

Is there a way to convert counts to rpm on a display without an arduino? Everyone uses arduinos but you can buy very small tachometers that obviously do not have an arduino inside? Thanks for the great videos.

Thank you for your work ! However I have some questions because I did not manage to make my system work : I need to calculate the speed of a RC car so i have to measure the rpm of one wheel.... I took your codes with a Arduino uno, and a ST022 Hall effect module, I followed the cable connections. The program is charged in the card. I put a magnet on the wheel, made it spinning while placing the sensor close to it. But nothing it coming out of it : the serial monitor returns me " RPM : 0 ". I've tried both sides of the sensor but nothing changed. I hope you can help me

Does that apply with the ss41 sensors?

Don't you need the "volatile" modifier for the interrupt changed variable?

yes exit status 1 #include expects "FILENAME" or

Thank you great video but how does one get to see the programme, many thanks

Hi, i have a question, which parameter should I change in order to put the sensor output on a different pin? (For example 9)

Hi Sir - Wanted to just ask, do I have to use a 3144 Hall-effect Sensor or can I use a different type as I cannot locate a 3144 hall effect sensor in my country. If I use a different type will it still work? Thank you in advance sir

👍🏼🇧🇷

Hey man, I was going to ask if I could use the code in your video for a arduino mph speedometer im working on and upload a video on it using your code for the rpm? Thanks.

Any idea of the maximum switching frequency of the sensor? Thanks

nice video.. but i need more of it. lets say I want to maintain the RPM value of the engine. so if the RPM drop below 600 the arduino will command a servo to pull up the throttle. and release the servo if RPM reach above 600. can you help me to program that? thanks in advance

🎖🎖🎖🎖🎖

Great, could that be placed against the spark plug lead of the lawxn mower to get the same effects instead of using the magnet on the flywheel?

Hi how many max rpm can this read Thank you for your work is very good...

I want to try and use this to detect if my generator has started. Using AC out isn't suitable for my situation so this just might work!

serial output only displays 0 RPM even when there is a magnet that passes by, does this code need to display to an LCD to work?

Is it possible to use an esp32 instead of arduino uno? If yes can you post a sketch?

hi, I tried the code by inserting the brackets as you said but it keeps giving error

rpm=(max(1, revolutions) * 60000) / elapsedTime; //calculates rpm no matching function for call to 'max(int, float&)' error in arduino IDE version 1.8.13

As far as I know these little guy are accurate up to 320,000 pulses per second. ~~

I wanted to measure rpm of 6 .motors.How to do it?

Bruno Borleri 1 hour ago My project is an "RPM counter for a 2-speed engine". I tried your program, your project involves only one magnet so 1 lap 1 pulse, I in mine built a rotor with 6 magnets then 1 turn 6 pulses to have more precision, I do not know if this is wrong, I wanted to modify your program but I have no programming experience, if you can indicate the correct way to change ,then I wanted to remove the fractions of 100 RPM,example if I read 12570 RPM I wanted it to be incremented by 100 RPM,example 12400/12500/12600 etc.with an increase or decrease of 100 RPM, the electrical hardware and connections are the same as your project only changes the magnet that I have built with 6 magnets at 60°, thank you if you can help me in editing the program. Bruno Borleri The electrical hardware and connections are the same as yours. Thank you

Hi, I've just replicate your project and it works, but i need your help. I wanted to measure the rpm of my dirtbike but unluckily the rotor has a pair of magnets instead of one. I've tried to modify the code changing the value 60000 and putting 30000 instead on : ' rpm=(max(1,revolutions) * 60000/elapsedTime;' but it didn't work, it shows me 2000 rpm at idle. I Think the problem is that the magnets are closer to each one, they need to be at 180 degree instead. What I can do? How I can fix my problem? Thank you!

Hi, I've really enjoyed your clear and easy to understand video. I've been searching for some help with a electric motorcycle project I'm working on as a mechancial engineer, but need some help on the electronics and arduino side of things. Would you be interested in some paid work? If so drop me a reply and we can connect. Thank you.

This is a 5v overide

Hey, move your toes from under the mower. You're about to loose them.

I'm sure you did all this to show your wife what real work really is to make a salad! On the serious side I'm wondering if the delay(1000) impacts the performance by not slowing the reading speed

COMPILE ERROR

It doesn't measure an rpm below 60..

Great info. Love your work. I had to add this to the code to get it to work but got it uploaded. Thought id paste it in case you or anyone else needed help. #ifndef max #define max(a,b) (((a) > (b)) ? (a) : (b)) #endif pasted just above the if statement with the max function. Mine wouldn’t compile but the above fixed it. Keep up the great videos. You were super easy to understand and I immediately subscribed. Now let's see if this works.

hi is there an email i can contact you to help on a project ? thank you

Nice, very cool❤🇧🇷😉👍 "@arduinomaquinas" thanks you 👏👏👏👏👏👏👏 subscribed