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From a hundred code i found, only from you that can work. Thanks a lot 🙏🙏🙏🙏

Really a good code , you just got on the spot, Can i asq for help, im trying to made the same but for two readers rpm, but my code not work, if any can clear my mind, im lost. Or if you want you can tellme a price and if i can iwill pay you.? Ñ float revolutions=0; int rpm=0; // max value 32,767 16 bit long startTime=0; long elapsedTime; float revolutions2=0; int rpm2=0; // max value 32,767 16 bit long startTime2=0; long elapsedTime2; void setup() { Serial.begin(9600); pinMode(2, INPUT_PULLUP); // set pin to input pinMode(3, INPUT_PULLUP); // set pin to input } void loop() { revolutions=0; rpm=0; startTime=millis(); attachInterrupt(digitalPinToInterrupt(2),interruptFunction,RISING); delay(1000); detachInterrupt(2); revolutions2=0; rpm2=0; startTime2=millis(); attachInterrupt(digitalPinToInterrupt(3),interruptFunction,RISING); delay(1000); detachInterrupt(3); //now let's see how many counts we've had from the hall effect sensor and calc the RPM elapsedTime=millis()-startTime; //finds the time, should be very close to 1 sec //now let's see how many counts we've had from the hall effect sensor and calc the RPM elapsedTime2=millis()-startTime2; //finds the time, should be very close to 1 sec if(revolutions>0) { rpm=(max(1, revolutions) * 60000) / elapsedTime; //calculates rpm } if(revolutions2>0) { rpm2=(max(1, revolutions2) * 60000) / elapsedTime2; //calculates rpm } String outMsg = String("RPM :") + rpm; Serial.println(outMsg); } String outMsg = String("RPM2 :") + rpm2; Serial.println(outMsg); } void interruptFunction() //interrupt service routine { revolutions++; } void interruptFunction() //interrupt service routine { revolutions2++; }

Thanks for this - needed exactly this to test the RPMs on a bunch of brushless motors and this is simpler and more stable than an IR sensor👍

thanks!

you could make ignition timing systems with this

As someone who doesn't know much about electronics, I understood the function. However, I have a further problem. I need a 0 to 10V signal to control a diesel engine. No speed 0V 4000 revolutions 10V. Can you tell me how I can make this happen?

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.

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!

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 ?

Great video. Have you tried soldering with this? I bought one of these to solder microphone leads and I can't get it to melt the solder on the contacts. It seems hot enough when I touch the solder wire on to the iron but it seems that it hasn't enough power to keep hot enough when trying to solder to the contacts. Can you recommend a good soldering iron without breaking the bank?

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

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

Good day! My QC 15 R side speaker isn’t working , is there a way to find out whether the replacement will work or it’s a circuit board issue ?

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 RUclips 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 RUclips, 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. ;-)

2 notes: - One of the screws is longer than the other 3. - Be mindful of the screws when handling them, otherwise the speaker magnet will eat them up and it’s a pain to rescue 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

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 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 👍

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

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.

Awesome video. A great help

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.

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 ?

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.

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

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

Thank you so much!

Cool! Well done!

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

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

thanks for sharing

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.

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

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.

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

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.

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

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

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!! 😁

👍🏼🇧🇷

The Best!

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

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

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.

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

Nice!!

Does that apply with the ss41 sensors?

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

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.