The world needs more science teachers like you!

@kevingauthier2367

6 жыл бұрын

inaicrnd Agreed

@_earlyworm

6 жыл бұрын

bruce yeany nuff said

@ericgarcia6543

6 жыл бұрын

yes So true

@GiancarlosToro

6 жыл бұрын

"Yeah science!" - Jesse Pinkman

@FoxyGrandma915

6 жыл бұрын

Could use a little more organization tho >_

The best part of the video is your well resourced workbench, which is a hobbyist's paradise. Keep working with new projects. That corner of your home will never let you age.

Who didn't like this??? Kids need this back in school. They have no idea how stuff works and how to fix stuff now days. If they can't fix it with a computer, they think its broken. Great Job!!!

@DaveBodnar

6 жыл бұрын

Thanks for the kind words, rc_farmer48 - it is appreciated dave

The whole presentation is wonderful... but, the 'waiting' propeller when the video is loading blew my mind... in a good way. TERRIFIC :) I can't wait to do this myself. Great job.

@MGSLurmey

6 жыл бұрын

That's called the buffering icon and indeed, KZread does change it to be a fidget spinner on videos with "fidget spinner" in the title. That's just how popular these things got! Mind-blowing!

When I was a kid back in the eighties, I used to fiddle around a lot with a battery cel, a small bulb, a magnet , a dc motor and some wires. I was doing science and I loved it. Till they taught it at school as "Physics". then it got boring. I dropped the class.Never would have happened if I had a science class that was like this. I only rediscovered my love for it five years ago. My schooling screwed me! At the moment I'm into building rc gliders and I built my first pulse motor just this year.

@DaveBodnar

6 жыл бұрын

Many folks have similar experiences - fortunately some rediscover science as a hobby at some point in their life - great fun to experiment! dave

@vitoschiraldi9762

6 жыл бұрын

If you take experimenting out from Science, you're taking Science away

@abhishektiwari2101

6 жыл бұрын

"Till they taught it at school as "Physics". then it got boring. " It's fine and good to see things happen, gyroscopic precision for example. But at some point you want to know what REALLY is happening behind the scenes.. unless you know physics, welp. It really depends on your professor - I'm am a mechie here, and I'm absolutely in love with what I'm being taught!

@abhishektiwari2101

6 жыл бұрын

@Vito Schiraldi Completely agree with you :)

@kevingauthier2367

6 жыл бұрын

Congratz bro

Mr. Bodnar, - I just discovered your channel and what a pleasure it was learning about creating a motor with a fidget spinner. I must say that your style of teaching is very pleasant and informative and I enjoyed learning throughout the entire session. At 51 it is often a challenge for me to enjoy the style that accompanies many instructor's presentations. I really like your straight-forwardness. I find that many KZread "instructors" are what I would call BoobTubers who like to perform and make the viewer endure their mindless antics in the name of what some might consider "production value". I guess it could be why Old Guys like myself may be considered cranky and impatient! You Sir, are refreshing and I look forward to learning more from you! Thank you, Pete Peterson O.G. - San Diego

@DaveBodnar

6 жыл бұрын

What a nice message to wake up to this morning, Pete - I appreciate your taking the time to let me know that you enjoyed the video thanks! dave

@ralphrego7470

2 жыл бұрын

@@DaveBodnar I couldn't agree more with RPipxl, I am 63 and I just discovered your channel. Very refreshing, I wish you were my teacher, I am sure the children that you taught must be doing great in life. I do wish you the very best, and may God bless you always.

@DaveBodnar

2 жыл бұрын

@@ralphrego7470 - Thank you for your kind words - Teaching was great fun! dave

This is the simplest and most elegant implementation of a brushless motor I've seen. This would make a good demonstration in Electrical Engineering school

Fantastic, at first I was going to say you built a brushed motor not a brush-less, but after installing the reed switch you made a great example of how brushless motors work with an ESC.

This is the sort of thing that gets young adults interested in science/electronics.. Excellent work!

@DaveBodnar

6 жыл бұрын

Don - thanks for your commend! It is appreciated dave

Thank you for your contribution. You are a very good, straight speaker and easy to listen to and understand, and you know exactly what you are talking about. ✌️

@DaveBodnar

4 жыл бұрын

Kevlar - thanks for the kind words!

you wouldn't believe how hard it was to find a video about mechanical electrical things without knowing what i was searching for. I just wanted to see something like this but i couldn't describe it. I don't think I could have found a better video. I actually learned something, and I've been in school for mechatronics for a while.

@DaveBodnar

6 жыл бұрын

That is good news, Austin - It is nice to hear that you enjoyed the video! dave

@austindovel2139

6 жыл бұрын

Thanks, not allot of you-tubers reply to their commentators. Is it 4 am there too? lol.

@DaveBodnar

6 жыл бұрын

It is, Austin - just got up! dave

Loved the fidget-spinner loading animation- you obviously put in a lot of work into the presentation. Hats off to you, and thank you for this wonderful video!

@DaveBodnar

6 жыл бұрын

You are quite welcome, Vinay - it is good to hear that you enjoyed it dave

This guy is pretty cool. I had a teacher like this back in my day and it really did make a difference to have an educator that makes things interesting. Teaching seems to be more of a talent, some people are natural and take to it.

I was looking at cars then somehow stumbled on your video. Never thought I'd have any interest in using much less modifying a fidget spinner but curiosity kept me listening and I found myself completely fascinated by your work and ingenuity and the manner in which you explain what you're doing. Makes me want to try this on my own. You're an excellent teacher and I'm sure your former students learned a lot and were happy they had you. Sending you a virtual apple. (''''')

Perfect ! Those switches are much larger. Got new ones on Ebay. Thanks so much.

I love this guy he incorporates things that people enjoy into science i think it’s really fun I wish you were my science teacher

Hi Dave, nice video. Check D1 on your circuit with the reed switch, I think you'll find it's backwards. When the switch closes the diode is forward biased by the battery. Nice job on the motors, you are a good teacher. KZread needs high quality teachers like you.

@DaveBodnar

6 жыл бұрын

It is good to hear that you liked the video - it was fun putting it together. You are right about the diode - I corrected that image on my web page. Good eye! thanks dave

That was very exhaustive and educating explanation on this matter. Many teachers in this world should learn from you how good teaching is done properly.

@DaveBodnar

5 жыл бұрын

That was very kind of you to say, Pasi thanks! dave

@pasimakila6567

5 жыл бұрын

@@DaveBodnar You're welcome and you really deserve it. Keep up your good work.

lol the loading symbol is a fidget spinner

@stumbling

6 жыл бұрын

I noticed that too! Seems to be for any video with "Fidget Spinner" in the title. haha

@journeymultimediainc

6 жыл бұрын

Yeah, that's clever!

@nicewhenearnedrudemostlyel489

6 жыл бұрын

man, having internet other than 1gb fiber must suck. lmao. i having seen a loading screen in two years.

@awesomestuff9715

6 жыл бұрын

NiceWhenEarned RudeMostlyElse lol

@fern586

6 жыл бұрын

lol liar

Great. I have never understood how brushless motors work but this was perfectly explained.

Excellent tutorial, love your teaching style and demonstration. I’m going to be replicating these experiments with my son in hopes that he’ll catch the tinkering bug. Thank you sir!

@DaveBodnar

5 жыл бұрын

You are quite welcome! I hope your son has fun with it, too! dave

Thank you for posting this video, I've been fascinated with magnets and motor since I was about 8 years old. Peace.

@DaveBodnar

6 жыл бұрын

That is good to here - thanks for taking the time to post. dave

@jeffreyalbin7056

5 жыл бұрын

This is what I have been looking for Don't think diode for timing but prevention is cure . THINK SWEET SPOT AND HARNESS KINETICS /ENERGY . A COUPLE PEDDELS IN MORNING A COUPLE AT NIGHT ATTACHED TO SOME TESLA FACTS . NUFF SAID .

We need more of these teachers in high schools in the US.

If you use bifilar wound coils you can just about wipe out the lenz effect. This becomes more important if you add a coil like your drive coil with a bridge rectifier for power. to power your motor. Try it before you say it can't work. the bifilar wound coils is the key. The bifilar wound coils will get rid of most of the loading effect. I recently found a patented generator that makes use of this effect. just use 2 wires while you are winding your coils and connect the 2 circuits in the coil in series, it's just that easy

just found your videos. you're my new favorite teacher. thanks!

Good video, one can see that you are a good teacher, clear instruction, thanks

I wish I could have science teacher like u !! But it's never too late to learn something new, thank you for sharing the knowledge sir ! 😊

I loved this! I'm sure my children will love it too. You earned yourself a subscriber. Thank you and greetings from Portugal.

@DaveBodnar

5 жыл бұрын

That is very nice to hear, Vitor - thanks for letting me know Have Fun! dave

You can also add a small neon bulb across the coil - this will reduce the back EMF stress on the switch (either the mechanical or reed) and will also produce a cool rhythmic flash in sync with the motor (reminiscent of a spark plug firing). The collapsing magnet field in the coil (when switched off) will produce enough energy to flash the neon bulb (which takes about 60 volts or greater) - demonstrating the relative strength of the back EMF compared to the low voltage you are using to actually operate the motor.....

I was just about to suggest an optical and a hall effect transistor when you mentioned something there at the end. Since you will be using an optical sensor there is no reason you couldn't count those pulses with a scope, or better yet a MCU like an Atmel (arduino). That will give you the RPMs... Neat video. Thanks.

@DaveBodnar

6 жыл бұрын

Right you are - see the 2nd video for more kzread.info/dash/bejne/nJqAt8Vwma_IoJM.html dave

@michaelblanco1214

6 жыл бұрын

Atomkey Sinclair /

@meestermole2412

5 жыл бұрын

@@DaveBodnar oh awesome.

Great presentation, Dave. If you want to protect your switch from back EMF, you might want to consider replacing the diode to a capacitor. That will allow you to run the motor in both direction. For example, a 10nF capacitor, rated for 250V would be ideal for this application. Keep up the good work!

@DaveBodnar

6 жыл бұрын

That is a good suggestion - I may give it a try! thanks dave

Dave, great video. Just discovered your channel. I am sure that you positively influenced a great many students. I will pass along your channel to my grandson who would rather tinker in the workshop than watch TV or play video games. I am now a new subscriber.

One question that comes to mind is regarding the power of the motor. Will it have enough energy to do some work? Also, will larger magnets or maybe a larger coil increase the power?

excellent video. Very well spoken and everything explained well. 150 people failed science.

@DaveBodnar

6 жыл бұрын

Appreciate the comment, Geo - thank you! dave

11:37 reed switch, back imf, and diode use tip! thx!

This is cool! I've thought about making a motor for a while now and this video has given me some ideas. Though, I have to say that while it's not technically brushed, using a switch of any kind really serves the same purpose. I was dumbfounded when I saw a "brushless" DC motor for the first time and couldn't figure out how they worked. When I finally did learn that it's just simple electronics turning the magnetic field on and off rapidly, I was a little disappointed.

Pretty cool. Ive seen channels make these spin with mechanical input, and they go so fast they destroy themselves. You should design an electric motor like this fast enough to fail catastrophically. THAT would be an epic video.

As an electronics dummie I learned a lot of cool things from this video. Very inspiring, thank you :D

@DaveBodnar

6 жыл бұрын

That is good to hear! thanks dave

I'm totally into videos like this, please make more

Very nice explanation. I wish a had a teacher like you in highschool.

This man is going to rule the world with science and fidget spinners

Can we generate,free electricity, energy,or like solar energy,wind energy,and all,or some with,man power and spinner combination?

I think if you wind the coil back and forth it makes a much weaker electromagnet - the coil going one way produces a field that cancels the coil wound the other way.

this man deserves a noble prize ...

lOVED THIS AND A THUMBS UP BECAUSE OF NO ADS!!!!!!!!!!!!!--------------Ernest E. Johnson

What would happen if you put 3 triggering magnets? Would it triple the speed, or at least increase it?

@DaveBodnar

6 жыл бұрын

If you also added two more coils it surely would have more torque, perhaps more speed as well. dave

@wh00per--

6 жыл бұрын

More torque for sure, the speed depends on the pulses energizing the coils :)

@DTXBrian

6 жыл бұрын

Yes and no. The pulses are determined by the speed of the rotor, so in theory, if the rotor could be made to spin faster, the pulses would speed up as well. If the switch were in the optimal position, the limiting factors would be friction, air resistance, and to a lesser degree eddy currents and hysteresis. All things equal, increasing the torque of the motor would enable the motor to spin at a higher limiting rotational velocity. Actually, what's important is to increase the rotational impulse, so either increasing the torque or increasing the duration over which the torque acts would yield benefits. So using a variable frequency alternating current could significantly increase the speed of this motor.

@jaysiddhapura

6 жыл бұрын

I think number of fidget spinner arms has relation with speed !! And torque is related to how much voltage u r supplying the coils

Close to sixty years ago, I remember building a motor from nails, copper wire and a big old battery. My grandson is about the same age ... there's a fun project.

relating a trend to basic motors, love it.

i love how your desk looks

@DaveBodnar

6 жыл бұрын

My desk (and whole shop) is a busy place - not messy, just busy! dave

@meestermole2412

5 жыл бұрын

yeah its awesome

Really cool! Makes me reconsider fidget spinners. I would suggest getting rid of the microswitch and using an Arduino to control the power to the electromagnet, coding it to use the PWM pin would allow you to control how many times it turns off and on without robbing power. Thanks for the great project I may have to introduce this to my 7th graders.

@DaveBodnar

6 жыл бұрын

Cameron - I have experimented with using an Arduino without too much success - The Hall sensor and phototransistor (both in part 2) gave me the best results - if you get it working with an Arduino please let us know. dave

I am very surprised by this great video. For english speakers in the world, please more electronics videos. I subscribed to you especially from Germany with the best recommendations. Thanks! P.S.: in your video you made a mistake in the circuit description, the diode is connected the wrong way round.

Just a thought, and you may have discussed this further in the video but a hall effect sensor would work too.

@DaveBodnar

6 жыл бұрын

Edward - I did use a Hall sensor in part 2 - see: kzread.info/dash/bejne/nJqAt8Vwma_IoJM.html thanks dave

Thanks I wish you demonstrate the simple coil emf sensor When a magnet moves next to the coil, emf can be used to signal the main coil

@DaveBodnar

4 жыл бұрын

This article may be of interest to you www.trainelectronics.com/Pendulum/article.htm dave

I love intelligent people doing things like this!

Cool project! I suggest you use a hall sensor from a brushless DC fan from a computer. That way your motor lasts longer and has a quicker reaction time to operate the electromagnet.

@DaveBodnar

6 жыл бұрын

Good suggestion ! Have a look at the 2nd video where I do just that kzread.info/dash/bejne/nJqAt8Vwma_IoJM.html dave

@Bandicoot803

6 жыл бұрын

Oh! How did I miss that!?

thanks for posting. good work. here is a some very late info for you and your subs. Hardened steel should NOT be used as the ferrous-metal core of an electromagnet/solenoid. why. at some point in the future, the steel will become Permanently magnetized. the presence of a permanent magnetic field in the core material will Adversely affect motor performance. compare the silicon steel used in transformers, etc. instead, any kind of mild steel would be a better choice for the core material. a few nail shafts, in a bunch, could be used. cheers

Thanks Dave. I love learning and you're a good teacher!

@DaveBodnar

6 жыл бұрын

Earl - it is nice to hear that you liked the video - thanks! dave

this is the only fidget spinner video that i have actually enjoyed

@DaveBodnar

6 жыл бұрын

Glad to hear it, Josh! dave

neat little video for starting a day. i love people spreading knowledge

Fantastic! Keying up no. 2 right now.

Conveniently,, the sewing machine from which you took the bobbin has a variable bobbin loader.

Great video! Why are all motors not brushless? Doesn't seem hard or expensive to build.

He did a brushless motor with no ESC and 1 coil what a genius!!!!

In the diagram at 9:48 the diode is the wrong direction and it will conduct current instead of letting it pass through the coil. Reverse either the diode or the battery.

awesome. I'm all for anything to make engineering approachable to the masses and you did an excellent job with this video!

@DaveBodnar

6 жыл бұрын

Thanks, Andy - appreciated! dave

Congratulations Dave, I think this is a really very interisting experiment for electronics beguiners!

@DaveBodnar

7 жыл бұрын

Thank you for your kind comment, Emerson - it was fun putting it together. dave

If you take a fidget spinner and spin in up in your hand you can feel the gyroscopic effect, but if you put two side by side and spin them opposite directions it cancels out the gyroscopic force. That's the kind of thing that fascinated me. What grade(s) did you teach? I was guessing 6th.

@DaveBodnar

6 жыл бұрын

Yep, 6th for 17 years! dave

I'm interested to know if this would work with an LED persistence of vision spinner. They can be programmed to show the speed but I'm not sure how fast they can spin before the image destabilizes. Also, I wonder how much of a load these can handle, say, if you hook it up to a set of gears, maybe on a toy car, or what if you hook up several spinners on a drive shaft?

@DaveBodnar

6 жыл бұрын

Elvis - if you balanced it very well it could be spun by the fidget spinner - the issue would be getting power to the POV part (unless you added batteries directly to the POV) - give it a try! dave

love the video. Do u have any idea on what the winding and the AWG size of the windings can effect in the motor. i am really into brushless motors that are used for racing drones.

@DaveBodnar

6 жыл бұрын

Fritz - I don't have any data on wire size but I am sure that it does change things - if you do any experiments let us know what you find dave

is this an example of the magic 1.1° angle you have to have for semiconductors to?

I was wondering if there was a reason why you didn't show close shot of the wiring of the microswitch and the reed switch, unless each one is a two wire switch like a light switch of a house. But for some reason I think they are more than a simple two contact set up, maybe three or more? Also I was wondering if you had the coil pole end the same as the magnet pole ( repulsive force) or opposite or perhaps that doesn't make any difference except it would just cause a change in the position of the switches? Furthermore you said it maybe a good to install some sort of diode with the reed switch so it doesn't get quickly corroded. Is a diode a simple two wire connection that is installed to what wire in the reed switch you said? Thank you very much.

super cool but would it generate enough power to compensate for used power?

The smoother you make the two contacting surfaces the less friction you would have to worry about which means the faster it will move

Starters use a brushed DC motor, so what uses a brushless DC motor? Desk fans maybe? Just wondering.

Use a magnetic reed switch, just make sure it's beefy enough. Maybe have it operate transistor. Overall great job!

That is pretty good. What would happen if you put a wire wrapped in a toroidal shape around the circumference of the three spinners and run an electrical current through the toroidal shape? The current could be controlled by a computer to run at a desirable speed. Could the speed of the spinners be controlled by varying the electric current?

@DaveBodnar

6 жыл бұрын

Thomas- that sounds like what it would take to make it a traditional brushed motor unless you found some other way to power to the coils you describe dave

A fascinating video, thank you. Even though I "kind of knew this stuff", it's great to see it done, and explained so clearly. Also, thank you for not saying "go ahead and"!

@DaveBodnar

6 жыл бұрын

It is nice to hear that you liked the video - thanks! dave

I might just use a relay coil by taking apart one. They're cheep and come in different voltage ratings.

@DaveBodnar

7 жыл бұрын

Not a bad idea, Douglas - let me know how it works for you dav

ouch did you get that cut on your hand from sticking your hand in your hand made motor while it is spinning????

a couple questions sir...what was the supplier you used for the neodymium magnets, what was the "N" rating and did you look to see the ABEC rating on the central bearing, you mention 7 volts (DC), but at what mA ???. I have been working on a special project and am looking forward to maximizing efficiency

@DaveBodnar

6 жыл бұрын

Good day - I used a number of sources for the magnets including www.kjmagnetics.com and Banggood.com I have no record of the "N" rating - sorry. I did not take readings on the current draw that I recall - something that you can easily do when your build yours! enjoy dave

Thank you so much! I'm inspired! now Off to the LAB!!!

the only problem with this "motor" is it doesn't have a rotor shaft, so it cannot do any work, otherwise its a good example of a salient pole permanent magnet dc motor. this design could be adapted to demonstrate a synchronous compressor for power factor correction. for brushless though: you could use 2 spinners as the bell ends, and drill a hole in a bar magnet to make a 2 pole rotor with a threaded rod shaft (using nuts to secure everything) then use the reed switch and the coil to run it. or maybe use 2 coils with separate reed switches for more stable speed. then you can attach a load to it to demonstrate the motors usability, like a fan.

@A_Man_In_His_Van

6 жыл бұрын

It is doing work..its spinning that infernal fidget spinner. Lol.

Very good video. I am currently a science teacher myself. Great clear explanation, subscribed and looking forward to future videos!

Cheers from Aotearoa NZ.

Very good! I would have never thought of such a project!

Impressive how that concept was gorgeously explained ! Great job. It makes me wanna build one for my son ! :)

@DaveBodnar

6 жыл бұрын

Go for it - I am sure that your son will enjoy it & learn from it, too! dave

This man is amazing your a great man and i respect you very much. Your immense understanding is highly obvious. God bless you.

That was fun to watch, thank you.. I have to imagine you must've been/are of the more appreciated teachers by parents, and the students of whom enjoy the subject, and intriguing enough to cause the appropriate attention from the more laxidazecycle, I hope, as well...

Nice informative video - no nonsence or BS -

Wonder if it would move faster with a larger coil??

You may not be familiar with the colloquial abbreviation "AF", but this video is cool AF.

Just remember, it is NOT "electrical tape" it is sticky plastic tape, and must never be used for anything remotely electrical. After a time, the glue softens and can cause a fire, due to short circuits when it fails.

Me at 23pm: it's getting late. I should get some sleep. Me at 3am:

What if we had one of these systems built into the spinners and use it as a generator for smartphones. Great video i subscribed.

use a hal effect sensor. its much faster. the reed switch is mechanical and cant switch very fast or they would have used them in brushless motors industrially. there is also many other sensors that can work like infrared diode or ldr or many other types. you can also use leds by using two leds. a led emitter can work as a light detector by use of a amplifier circuit like the use of a transistor with the led by sending current trough the led but not enough to make it lid very bright. then light shine on the led, the voltage in the circuit increase a little is just enough to act as a trigger to increase current in the drive winding. by using another led when the leds are in straight line with each other, then detector led increase current in the drive coil, by letting the spinner block the light path of the leds, the current start to vary in the drive coil and the motor will run.

@DaveBodnar

6 жыл бұрын

Have a look at video #2 kzread.info/dash/bejne/nJqAt8Vwma_IoJM.html thanks dave

I enjoyed your clip. I see you as the new Mr. wizard yes I grew up watching him. I think he started around 1958 ? Can you show me how to make a wind turbine out of a 3 speed celling fan ? If so thanks. Lee.

@DaveBodnar

5 жыл бұрын

Lee - glad to hear you liked the video - it is fun putting them together. Not sure about the wind turbine project - perhaps someone has done it and posted a video?

How do the magnets not fly off at that speed? Ahh, you mention glue or bolts in the subsequent videos. Either I didn't hear/remember that in this video, or it was done without being noted.

@DaveBodnar

5 жыл бұрын

They come close to flying off! Have a look at the latest video that shows how I bolted magnets to the spinner when it spun at 5000 rpm - see: kzread.info/dash/bejne/gI2amqqwdpStZbQ.html dave

Now THAT'S a workbench!

What reed switch are you using, also how do you keep reed switch from arcing?

@DaveBodnar

3 жыл бұрын

I used a generic reed switch that I had in my junk box - I, too, thought that arcing would be an issue but it worked fine for quite some time dave

when they gave me the reed switch with the educational kit i was thinking what to do with this. now i know !! thanks !! :)