Arduino Basics: How to use magnetic Sensors, Reed Switch vs Hall Sensor

This video is the comparison of the two types of magnetic sensors:
- Reed Switch
- Hall Sensor
I am working on a POW display project and I wanted to decide which sensor to use.
Hope you will find this analysis useful. Also If you have any thoughts on this topics, leave your comments below.
The code and all the other details can be found under:
www.hackster.io/mdraber/magne...
Here is the list of used components:
- Arduino Nano
- standard LED
- 220Ohm resistor
- Reed switch
pl.aliexpress.com/item/328053...
- Hall Sensor
pl.aliexpress.com/item/326616...
If you like this content and you want to support me in creating similar videos go to my Patreon webpage
/ mariosideas
Or
www.paypal.com/cgi-bin/webscr...

[@wing2999]

Very informative and helpful. Thank you a lot!

[@urla.tejaswitaruneee2483]

Excellent work and thank you for this valuable information about sensors.

[@marios_ideas]

Give video a like if you enjoyed it

[@kiwinesss]

Excellent, thank you! Keep them coming :)

[@marios_ideas]

Thanks:)

[@thevastenigma2464]

Great video!

[@marios_ideas]

Thanks man:)

[@billgross3579]

You might consider doing your digital read only once and assigning it to a variable. Then use that variable rather than two digital reads in a row.

[@marios_ideas]

Thanks for the hint. I will keep it in mind when writing code for my next projects;)

[@user-in8bz3kd7d]

@@marios_ideas Brother this is fun, if the iron is close, it will sound the alarm, it is even more perfect, because the thief will take the screwdriver, and the key to unlock

[@Joseph-ei7gg]

Very helpful. Thanks

[@marios_ideas]

Glad to gear. Consider supporting my channel:)

[@brandonly27]

Thank you! I appreciate the review. I almost bought a reed switch but then I changed my mind upon watching this video.

[@marios_ideas]

please give the video a like. Helps with youtube algorith:)

[@user-nd8rv4dz1c]

Thanks for your video, can you let me know the strength of the magnet, is it. N35 ?

[@ningcao786]

Regarding that the reed switch doesn't release on 3:14, the magnetic field should be parallel to the axis of the reed. If your magnet is axially polarized (instead of radially), then it needs to be rotated 90 deg.

[@tydshiin5783]

Dumb question, so does that mean that I can purposely make a reed switch(NO) stay on if I wave the magnet at an angle? Trying to make a project to that uses a magnet as a switch that stays on/off

[@paulsharpe3794]

Hi there I have been working with read switches for over 30 years and some times they can stick

[@toqeerahmad7378]

Great Job....،,👍

[@MrBobWareham]

You should try the latching hall sensor!!

[@ryans1972]

Have a GE cloths washer that used a reed switch encased in rubber. I am sure either the vibration or lid dropping broke it. Hall sensor would most likely not break.

[@marios_ideas]

Yes . It definetly seems more reliable

[@bluehong2395]

Hi Mario, that's a great comparison study you have performed here! I have a question, is it possible to use the Hall Sensor to detect the magnitude of Magnetic strength with respect to the distance between the sensor and magnet? Thanks for any replies!

[@marios_ideas]

Not the hall sensor module as this is digital returns 0 or 1. But the hall sensor . But if you use just plain hall sensor like this one pt.aliexpress.com/item/1005002422775127.html you can connect it to analog pin and see if based on the reading you can estimate the distance. Did not try it but should work. Just like using e.g. photoresistor. Let me know how it goes. In a meantime give video a like. Would help to grow my channel

[@patrickmaartense7772]

yes you can, there are ANALOGUE hall sensor modules, these will output a value that determimes the fieldforce. the digital modules use a threshold value internally to report LOW or HIGH I used that te replace a noisy potmeter by mounting it between two magnets , the rotation it makes in the magnetic field can be easily translated to a rotaion value.

[@Tyler-pj3tg]

I am going to use a hall sensor to search for Josephson Junctions in aluminized mylar space blankets.

[@tshxxmx]

Hi. This is pretty helpful. Wanted to ask if I could use the Arduino Nano to implement 4 magnetic sensors.

[@marios_ideas]

You can have as many sensors as you have input pins available

[@mikewelch3903]

Could you design an Arduino Nano/linear Hall Effect circuit (KY 024) that powers about 8-10 LEDs, one at a time, depending on how far the magnet is from the sensor? I need this circuit. It would be useful in showing exactly how far the magnet is in its movement. Each LED would indicate a different distance, as the distance changes.

[@marios_ideas]

You have to use just a plain hall sensor like this one pl.aliexpress.com/item/1005003406316017.html connect it to ananlog pin and read the value off that pin and then write few if statements saying if the value is in that range light up this led etc

[@adhismandiri88]

Gimna cara sambungx alat itu dgn tombolnya jam DC mini bos ? ( Tombol / saklarnyanya di gnti Reed switch magnetikx bos )🙏

[@patrickmaartense7772]

the biggest advantage of the hall sensor is frequency , I use the sensor to measure rpm as well, a reed switch would be useless for that.

[@marios_ideas]

Yes. In one of my videos I div POV display on the old fan using hall sensor. This would not work with reed switch

[@sevdev9844]

Could it be, that the repeated testing of the reed switch turned the metal magnetic for a certain amount of time, and it just didn't work because of that. In that case the sensor would still be useful in cases, where the sensor is only triggered occasionally (and safety doesn't matter).

[@marios_ideas]

That may very well be the case. This is also the cheapest one. I know they are used in e.g. watching machines

[@rawyin]

It's possible your problem with the reed switches was the strength of your magnet.

[@marios_ideas]

Not sure. If it got stuck moving magnet away did not fix it. Do you mean the magnet was to strong?

[@rawyin]

@@marios_ideas On small relays I've had a couple ruined by overly strong magnets. One that I use for a sensor I now have placed 3" away from the very powerful neodymium magnets in the application after destroying another.

[@kiwinesss]

Now I just bought a bunch of reed switches and hall sensors from aliexpress for my own experiments. They are ridiculously cheap there. I bought a few of each because you never know how many will work or not. Do you get yours from aliexpress too?

[@marios_ideas]

Thanks for subscribing:) Yes, I get most of my stuff from Aliexpress

[@chrisvaccaro229]

@@marios_ideas How long does it usually take you to get stuff from AliExpress?

[@marios_ideas]

@@chrisvaccaro229 Anything from 30 to 90 days. If you order bulk of components for future projects it is ok but If you want something quick then not so much:)

[@hendriokysafata2779]

permission to ask sir, if we want to make an object fall timer using a magnetic sensor, what is the program code like?

[@marios_ideas]

Not sure what you are trying to do. I can advice but I am not going to write the code for you

[@hendriokysafata2779]

@@marios_ideas thanks sir... I will make a falling object time measuring device for viscosity practicum

[@Crisdapari]

I arrived here because I have reliability problems with magnetic switches too. I'm using a water switch level that worked fine with two small DC 3-6v motor pumps in series, but then I replaced with a brushless 12v 4.2w pump and now very often doesn't turn off. Both configurations draw similar current (less than 0.5A rated for the water switch). I wonder if it's some induction problem or just a mechanic problem inside the switch, but I tested with few different switches and the issue continues and I trying to find why... I wonder what kind of reliability problems did you had with your magnetic/Reed switch.

[@marios_ideas]

Have you tried to use Hall sensor instead. The problems I had are visible in the video. Reed switch is a mechanical switch and for whatever reason every now and then it was not releasing after removing magnetic field. With hall sensor I created POV clock on the old fan with 500RPM and hall sensor was properly switching 500 times a minute . So they seem to be much more reliable

[@maxrizzato]

What about using MR Sensor, instead? Low power compared to Hall sensor, and as rugged and reliable as Hall sensor, also has high sensitivity, and is reliable.

[@marios_ideas]

Can you provide to the link to the exact sensor you have in mind

[@ianthehunter3532]

What happens if you put a magnet directly on top of the hall sensor?

[@marios_ideas]

Hall sensor reacts the same way no metter which direction you you approach the magnet from

[@KW-ei3pi]

Thank you. Very good information, and very well presented. I've searched your videos and am surprised that you haven't made any videos of Arduino control of Stepper Motors and Drivers. A very common usage. Video suggestion: (My project 😊) Arduino control of NEMA 17 Stepper w/driver, ON/OFF switch to power the system, momentary switch for FWD Direction, momentary switch for REV Direction, Potentiometer to control motor speed, Rotary Encoder to rotate motor a given number of steps via code. Thanks

[@kingsleykronkk3925]

Many different reed switches I tested failed also. Some not go off, some not go on. 2 pin reed switches N/O and 3 pin N/O & N/I all failed approx 30 - 50 % of the time.

[@marios_ideas]

I also show in my video that they are not 100% reliable. In my projects I go with hall sensor. If you check one of my videos where I build POV display you would see that malfunction like this if I was using reed switches would completely mess up this project

[@tihruytssgjjvsavcxtbvhj3429]

Did you ever find reliable ones? I am in urgent need of a reliable reed switch.

[@kingsleykronkk3925]

@@tihruytssgjjvsavcxtbvhj3429 Don't trust them on critical curcuits. Reed switches are only reliable if you test many and discard the inferior. They are suspectable to quality mechanical variations when made. They only good for very small milliamps and when used in consistent repeated similar situations with no variations. Example if the magnet sits a long time beside the Reed .. or not .. it effects the magnetic effect sensitivity.. you got the picture.

[@ianthehunter3532]

How big is each of the boards you showed?

[@marios_ideas]

I am on holidays. When I am back I will try to measure them for you But I guess they would be something like 2x4cm 3x4cm

[@ianthehunter3532]

@@marios_ideas My goal is to make a matrix with them, you think using shift registers would be my best shot?

[@Mr.ri4i]

Is it possible to somehow do a kompass out of this

[@marios_ideas]

Not sure How this would work

[@vasanthvijay6339]

Hi im vasanth from India I need your help if hall sensor contact with number of magnet its shown 7 segment display (like 1 magnet shown number 1 if i contact 3 magnet its shown number 3) please explain how is it and code

[@marios_ideas]

I do not believe this is possible as hall sensor reacts the same way to magnetic field so you cannot react differently to different magnets. Not sure ehat your project is. Normally it sounds like the use for RFID modules

[@vasanthvijay6339]

@@marios_ideas thanks for reply and is it possible to do reed switch sensor

[@marios_ideas]

@@vasanthvijay6339 Same thing. You would have to do it other way around. Multiple sensors and one magnet. Then it would work

[@vasanthvijay6339]

@@marios_ideas tq

[@faysalmahamud6309]

How I get this two types of sensor?

[@marios_ideas]

There are links to Aliexpresss store in the description of the video

[@mostafasohrabi5634]

exellent

[@marios_ideas]

THX:) Give the video a like if you enjoyed it

[@johngrund2567]

Were you ever able to determine if the trouble with the LED remaining on was due to the sensor (quality) or a result of the way the hardware is interpreting & processing the code? I'm extremely new, but watched an amazing video on interrupts . . . and watching this did give me the thought that a possible solution could involve utilizing an interrupt. I'll link the video here: kzbin.info/www/bejne/aJzVZnRpapV7bac

[@marios_ideas]

The problem is strictly due to read switch not releasing . Maybe there are better quality parts out there . I bougth is from Aliexpress. But this shows that this can happen so it is not as reliable as Hall sensor

[@marios_ideas]

I have not worked with timer interrupts yet. I have on evideo on External interrupts but it is old and I would do it differently now. Got more profficient with video and sound editing:)

[@uvwuvw-ol3fg]

@@marios_ideas Could try adding some 1 kOhm resistor in series with it. Mine started to work with 100 Ohm but more is better theoretically. Decided to use 1 kOhm for better optimal input impedance and noise immunity. Seems weird that even the circuit provided with the reed switch might draw some capacitive inrush current which partially welds the contacts.

[@Tyler-pj3tg]

What about analog encryption for communications? Two of the same tape recordings on two nodes. Analog encryption saves a lot of energy for video transmissions. If you turn off encryption on your router. Your phone's battery will last twice as long.

[@marios_ideas]

This probably was meant for a fdifferent video. Right?

[@mohammadsaiful5099]

Bm

[@richardpetersen2747]

You only used 5 mA instead of the 15 mA it recommends.

[@marios_ideas]

Please Give me timestamp in the video So i can check. This is the very old video ,

[@jacobclark89]

☠️ I've been experiencing extremely dangerous episodes of the motor not stopping on my ebike as soon as I turn the throttle , related to high humidity conditions ! I think it's because the humidity increases conductivity of the hall sensors in the throttle . can you recommend a good throttle ? I think the manufacturers are going to have to make them water proof. I experienced the same issue with a different throttle , battery and controller. just using the bike after a rain storm is enough to cause the issue. We must have a throttle will a switch to cut power ! ☠️ Also stop using hot glue on the Hall sensors ! It melts were I live ! And make the throttle not Fall apart so easy , and they need to be made with softer grips or made to accept normal grip's.

[@marios_ideas]

Sorry I have no experience with Throttles. I might look at this topic in the future but am in no position to give any recomendations:) Especially if your life depends on them

[@jacobclark89]

@@marios_ideas Thanks, lm not at all asking for advice , but I would like to know if you were me what would you do ?

[@jacobclark89]

@@marios_ideas I'm going to try some dielectric greese between the magnet and sensor .