How Motors Work For Beginners (Episode 1): The DC Motor: 032
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- เผยแพร่เมื่อ 25 มิ.ย. 2017
- I explain how the DC motor works in a simply and patient way. I use several experiments that you can copy at home. Then I show a Treadmill DC motor cut open and working so we can see the moving parts!
If you want to chip in a few bucks to support these projects and teaching videos, please visit my Patreon page or Buy Me a Coffee.
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Watch the Whole Series Here.
• Introduction To Motors...
If you want to chip in a few bucks to support more content like this, please visit my patreon page.
/ jeremyfieldingsr
My website www.jeremyfielding.com
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Technical Notes and Corrections
Nothing to report yet.
Resources used in this series
Video references
AC Motors
• AC MOTORS
Motor Basics (three phase)
• Motor Basics .
AC Motors and Generators
• AC MOTORS AND GENERATORS
DC Motors and Generators
• DC MOTORS AND GENERATORS
Brushless DC Motors and Brushed DC Motors Explained
• Brushless DC Motors an...
What is Ground
• What is Ground? Earth ...
What is electricity
• Video
How to read a schematic
rimstar.org/science_electronic...
• How to Read a Schematic
Websites
www.studyelectrical.com/2016/0...
www.leeson.com/TechnicalInform...
www.johnsonelectric.com/en/res...
motors/principle-of-operation
rimstar.org/science_electronic...
www.usmotors.com/TechDocs/Elec...
Induction motor as a Generator
www.usmotors.com/TechDocs/ProF...
Books
Single -Phase Motor series number 723 by Edward Amrein
Not on amazon.
Amazon affiliate links
DC Theory by NJATC
amzn.to/2vMRwDn
AC Theory (get the used one, don’t spend $100) by NJATC
amzn.to/2wjgaNA
Three Phase Motors Series number 724 by Edward Amrein
amzn.to/2fUo217
Innova Multimeter 3320
amzn.to/2x0wQ9T
Tachometer RPM gauge
amzn.to/2x35Bv6
Final Note:
PLEASE UNDERSTAND...I receive hundreds of messages on all platforms (email, Facebook, Instagram, comments, etc) asking for advice, and help with projects. At this volume, I simply can't do one on one advice. I do read all the questions, and if I get the same ones over and over I make videos about it to help lots of people. Thanks for your understanding on this.
In 10min this guy managed to thoroughly explain something I’ve been trying to understand since I was a kid!
Thats a long time to not know of the birds and the bees :p jk
Yaa I was trying harder to understand in colleges n u simply explain in 10 min of our lifetime hardwork
Yeah me too lol. Jeremy is a an amazing teacher.
Man, you are not the only one. I understood it but it was not clearly understood until now. I think that is because they leave out details. When he can physically show you, then the ideas are locked in.
Jeremy is a special kind of teacher. Knowledge passes through him like air through an open window. The world needs more teachers like him !
I am 65 years old and for many years I have tried to get on top of simple electric motors but had problems taking it in. However I just found you on YT and learned more in one video than I have in my previous years. I think you have a great and simplistic way of teaching and explaining making it so much easier to take in. You should go into lecturing as your way of explaining is so on others level where many seam to look down their nose at us laymen who have no idea. Thank you so much.
Hello sir I'm vinay from Karnataka
sir after 12 by taking Electrical and electronics engineering can v work in magnetic train (Japan)...like bullet train ....
While agreeing with you, I hope you meant 'simple' and not 'simplistic'.
@@bayadere8308 ? does it not mean the same?
@@barrynorman3906 Certainly not. Here are a few dictionary definitions: "
Treating complex issues and problems as if they were much simpler than they really are."
"The adjective simple means plain, easy, ordinary, or uncomplicated. The adjective simplistic is a pejorative word meaning overly simplified-that is, characterized by extreme and often misleading simplicity. "
@@bayadere8308 OK I bow to your superior knowledge of the English language. Does it really matter, do you think you have to "mark my work"? Pedantic to say the least. Please mind your own business if I comment in the future as it is not needed. I wanted to praise this not have somebody pull me up because I used the wrong word out of pure innocence. You should use your knowledge for more constructive matters.
I have been teaching my 6 year old grandson how electricity works and how magnets can dislodge the electrons from the atoms and conduct electricity. He was fascinated with magnets at a very early age and this was my opening to teaching him to this point. He is now so far ahead of me in his learning and questioning process that I am always challenged to learn more to be able to explain things to him. Your videos are wonderful and have been a great help. This week we will build a simple dc motor and carry on from there. I’ve always wanted an excuse to make one and now I have it. Your videos are a treasure trove of learning and I’m learning so much from you as well. Many thanks 🙏🏽
This is the best demonstration of basic DC motor principles I’ve seen. Nicely done! You are a natural educator. Thank you, Professor Fielding.
Jeremy, I don't know what your degree is in - mechanical engineering, electrical engineering, applied physics, or something similar - but I feel so lucky to have happened on to your channel. Thank you for taking difficult and intimidating concepts and breaking them down in plain English. I appreciate your low-key and approachable style as well!
This video is great! (As are the many others I've watched so far.)
Thank you. I don't have a degree in any of the above. I am self taught. Thanks for the kind words! I talk about my profession and how I got the job in this video th-cam.com/video/F9gvFkfSfV0/w-d-xo.html
@@JeremyFieldingSr thats awesome. I went to school for mechanical engineering, but they teach you a lot of theories, a lot of equations, derivations, lots of math, computer modeling etc... but this sort of Hands on thing were almost non existent. We did have a Metal Cutting course, where we played with lathes, that's about it. I wish some of these science/engineering programs in college did more hands on stuff, to demonstrate how the theories we learn are applied.
@@JeremyFieldingSr I'm quite impressed you were self taught with the detailed knowledge you gave. That's another proof you don't need a degree to be an engineer!
@@danpt2000 they teach you a waste of time. Padding the basic information in order to charge you more money
@@JeremyFieldingSr - You have a degree from Jeremy Fielding Electrical Engineering University. Thanks a lot for your time.
This has to be the most informative video on motors I've ever seen. Excellent job. Can't wait to see more. Looking forward to how multiple phase motors are different.
really informative videos.
hope you'll explain a generator and the conversion between motor and generator too
The generator video went live yesterday... hopefully you found it helpful. Post any questions you have there and I will try to cover them in the Question and Answer video I plan to do! th-cam.com/video/uf2mI9pYcPg/w-d-xo.html
This video was awesome and makes what is taking place much easier to understand. Thank you, Jeremy!!!
@@JeremyFieldingSr Thank you Jeremy for teaching myself and everyone else, I have learnt and continue to learn so much. I thank you on behalf of the community who you have inspired/taught/helped with your incredible shared knowledgeable content.
Best wishes Sir,
Regards,
A huge fan
Sir, you would give Tesla, a run for the $ hands down !!
I recently started a new job in the electrical field and have no previous experience. Working with massive AC and DC motors, generators, companion alternators. Just starting to watch your videos and thankful for your production of great material !
10:57 When you have so much enthusiasm you just have to share to the world. I love it.
so relatable!
I'm a visual learner and that was freaking awesome!
Hell yeah
Me I want to know it to wind it
I am too! He made things far clearer than I've assumed they are
Can't always understand the theory side of things but if physically shown how things work am fine.
I'm an idiot who cant learn, and I also enjoyed it
Hi Jeremy, My son, an aspiring engineer (still exploring what kind he might like to be), asked me how electric motors work. I understood a little, but not enough to actually explain it. Thank you for this! He was wowed by the relationship between electricity and magnetism. We're going to build a simple motor as a project this summer, inspired by your video!
I wish I had a dad like you,
Don't wait for summer, if you can find small amounts of time each week getting him started.
I joke about being selfish when helping other because it's so rewarding.
Best wishes to a great pops!
Greatest teacher of all time. Making it so simple that even a child can understand. Thumbs 👍 to you sir.
I am sure these videos are being used in schools everywhere. You have a bigger impact than you can imagine.
Some people are gifted at communicating knowledge to others, and you are definitely one of them. From your description to your demonstration, this was the most easily grasped explanation of a brushed motor I've come across.
I don't know how I've never come across your channel before, because it's right in line with my interests, but you've definitely got another subscriber here!
exactly
I've seen videos on this topic with a much bigger budget, but none of them inspired me as much as this video to just try it myself. Great work, Mr. Fielding.
+William Dye thank you!
Agreed! I just recently discovered an urge to learn about motors and electronics at age 38. I've pretty much had no intrest in messing with anything electric my whole life because my brother was electrocuted when he was 15 years old and I was only 5 years old. So it really has me feeling accomplished in more than one way learning how to do this stuff. And this guy Mr Fieldings channel is absolutely fantastic
This is my second video I have watched of yours and, as I see others comments also, I cannot get over how well you explain things. I was definatly going brain dead watching other videos from OTHER people trying to understand anything about motors or anything electrical at all. Motors is what I am focusing on right now and am so grateful for your way of explaining. I can feel my brain working again!!! Just like a refurbished motor!! 😆 Thank you for your effort 🌠
Synrm motors are the future. Tesla switched from induction to synrm motors. LearnEngineering chan on TH-cam
I totally agree with you.
Keven said it exactly how I feel
I'm taking an engineering class besides my dayjob, I can spend hours reading textbooks, looking up formulas etc... Or I could watch one of Jeremy's videos and understand it immediately. Such a clear representation of the physics and forces involved that I, as a non-native english speaker, can understand everything with ease.
Why can't teachers make their lesson THIS interesting and Simple? It would produce better students and fewer dropouts
if they would teach it in 12 minutes .. what will they do the rest of school time
Because they don't understand the concepts well enough likely
I agree, thanks much. Trying to build a motor for a motor bike.
I agree with you, but to be fair, not everything you'll have to learn to become an engineer this interesting.
Because they do not have Btech degree and practical knowledge themselves.Rather they have theoretical and education based degree😂
Three minutes of the video and I have already learned and grasped more information than what college tried to teach me about motors and induction, the practical demonstration is amazingly good, thank you so much!!!
Here here
You are one of the best teaching demonstrators I've seen.
We really do live in a world of accessible education on every subject thanks to the Internet. That said, this video is great example of a priceless, free education on DC motors.
I’m eleven and already want to start engineering because of this
DN08 same, I make robots and I want to be able to my own motor
@@kylelawsuit6356 Because that's the only use I see for making Robots
Aheesh Mantha no, not just for humanoids. I just enjoy making robots in general. It helps me relieve stress, and it’s very rewarding to see something you made do something even as simple as picking up a box.
@@kylelawsuit6356 Hi, what do you use to make your robots? do you buy kits? where do you learn? I would like to build robots with my kids?
Mobility Joy I usually just use whatever I have around my house. Any old toys with batteries, I take them apart. Of course I take out all the batteries to not electrocute myself. I just use what I learned from a 5th grade science class, and experimented with circuits. Of course I watch videos too to avoid hurting myself. The way I learn is kind of dangerous, but so far I haven’t hurt myself. I would recommend buying a kit though if your kids have no experience with building robots. It’s a safe method of learning if your dealing with children.
I am taking a self directed course on building systems, I am currently taking the electrical portion of the program. I have trouble grasping these concepts written in textbooks as I am a visual learner. These videos are the best I can find on TH-cam tube for describing what is going on with visual feedback. Thank you, I can tell you’re very passionate about what you do. Keep it up.
I love your vedios,,,in 5th grade I made a motor two nails in a peace wrapped with copper wire and a impeller rotor that spun in between with a battery wired to coils around nails,,,my teacher was so impressed they made me go from class to class to demonstrate it,,,next I made a light and again class to class,,,my father was air force he invented the landing indicators for the c5 aircraft and was offered a position at NASA,,he was my teacher at home,, smartest man I have ever known,,he passed away 2 weeks ago, at 18 years old I took a mechanical aptitude test and scored at engineer levels. Like father like son.l miss him so much.
Great and informative video. And I love the fact that you keep it down to earth without music and effects and such. Your kind of videos is what make youtube great.
your inspirational for the young black man trying to turn his life around and learn. thank you
This is great! I've been a mechanic for 9 years and had the "general idea", but such a detailed video helps connect more dots together. I'll be having my kids watch this for their education as well!
I just learned more in this video then I did in however long I ever went to school.thank you
Not only are you an engineer, but you are a master teacher! Thanks
You do the best explaining of this stuff of anyone I watch. Simple, straight-forward and SHOW rather than just tell! You are REALLY helping me wrap my mind around this stuff. THANK YOU!!!
4 years at college, and this explained motors better. Thank you.
Hi Jeremy! I've been scrapping for years and always have buckets of old motors lying about, this has inspired me to start building instead of just scrapping. Working on a belt grinder now!
You really have a special talent. This is America's greatest need, someone like you teaching one about the real world workings.
This man is an amazing teacher!!! Thank you so much. My 6 year old enjoyed it. You should make videos on how to cut motors in half and make them work!
Hands down the best video I’ve EVER seen on this subject. In 30 years of hobby dabbling I’ve only now understood how the dc motor operates. Thank you so much!
Jeremy, you are an amazing teacher, I felt I learnt something after watching your videos, it is way better to understanding than having things just on paper, thanks for the post, great job!!
I wanted to take a DC motors course in my EE degree, but just watching your videos seems like a much more applicable lesson. Great videos you make dude!
Excellent introduction to electric motors. I really like your "cut away" motor, that is fantastic! Kind of like Electroboom for people who have seen enough sparks in their lifetime.
What would be fun with the copper pipe/magnet trick is to place a compass on the side of the copper pipe and observe how the magnetic field affects the compass as the magnet passes by.
I had never seen the magnet in the copper pipe drop demonstration. Ran right out to my workshop and played for 10 minutes with that one. I teach 9th grade STEM and will link this video to tomorrow's assignment. They made simple DC coil motors and this will be the explain/explore section. Great job. Many thanks.
Thank you for sharing. I am honored to be a part of a school assignment
The experiment demonstrates Lenz's Law, named after the guy who formulated it in 1834.
"Squirrel in a cage." Perfect illustration. Awesome video. Thanks.
Brother what ever i saw previous videos, you are the best. I am a practical man too and It's much more effective than the animation. Thank you for providing a valuable information and all the best for your work that inspire to learn electrical knowledge.
Jeremy, i've NEVER seen anyone do something like this! EVER. thank you for the DETAILED view and comments. I'm definitely devoted at this point to your videos!
Oh my......I do so love your channel Jeremy! You have taught me so much about a subject I am interested in but was not too knowledgeable about. I thank you Sir.
Great video. It’s wonderful seeing the actual parts rather than a computer generated moving graphic. I’ve never really understood how a motor works. I knew it had a coil and magnets but that was about it. Thank you for making this.
Mr. Fielding, keep doing what your doing. You are inspiring the next generation. Your passion motivates. The world needs more people like yourself. Thank You
Awesome! You have a gift of explaining things with a calm way making it simpler for us older folks. Thank you. Ps am 80 yrs old so u are never too old to learn! But it took someone like you with the gift of teaching in a manner that is perfect to understand.
I like how this gentleman teaches. Unlike many others you will clearly understand the fundamentals of what you should know based on his lucid techniques of teaching. Thank you Sir.
Fantastic video! You have a knack for breaking things down into understandable hunks. Well done. I can't wait to watch the rest.
Appreciate the video as I have nothing but time to learn right now I been teaching my self how to wire tech and I'm going to learn some basics on motors and I can tell you have a true passion for them which makes you the best person to learn from
Jeremy: I just found your videos and have to say "Wow". I dig your style of teaching. Thank you!
You did a wonderful job in explaining this topic. Keep up the great work.
I've been reading and researching forever on motors and magnetic field etc...I literally learned more in 11:46 than hours of reading..this is a subject that sometimes u jus have to see to understand and ur a great teacher..thx for all the time u spent making this video
I so appreciate the way you explain the workings in your videos. I don't think I've come across anything better. You don't waste time getting into things that complicate what you are showing us, which is why people tune in to see your videos. Thank-You, I'm a big fan.
yoooo wtf this beats every single video on youtube explaining this thank you!!
God Bless You, That was the most informative video I've ever seen.
I've been a journeyman electrician for 45 years and I have to say, you should be teaching in trade school. Not just because your good at it, but because you like it so much.
Best video explanation of DC motors I have ever come across I am a novice and I understand it. Well done .
Youre a natural teacher Jeremy and very clever
Dude you rock!!!!!! Best informed, and entertaining video I've seen in years (referring to all your videos I've seen so far) keep up the great work.
hey waaw
What a great teacher! Very steady and calm voice, creative and knowledgeable!
Jeremy I read that you don't have any degrees in this field but you are by far the best teacher/ video instructor I found so far and I just graduated from a trade school as an Electrical Technician and that school didn't teach this stuff anywhere as good as you did in 12mins! Keep this up! You're helping me out so much! Thank you
My friends mom is a college professor that teaches "basics of electrical engineering" to future engineers, masters and phds. I at the time, a student of engineering management replaced her a wall power outlet because she didn't know how, she wanted to call an electrician and i've told her "that's easy, only 3 wires, let me do it", i've done it before and i know how to do it properly (my dad showed me). She is one of the top professors in that university, who also lived and worked in Boston on some projects.
Jeremy, as stated by many others. You have a gift. You are able to effectively explain and convey this incredibly difficult to teach subject. Thank you.
Hi Jeremy, great video. You've got a knack for instruction, so keep it up!
I love the way you explain thing in you videos, I feel a little smarter every time I watch one.
I am very happy to see this video laboratory which maked me understand the principles of the electric motor. At 61 years of age and on retirement I imyend to do a cpurse on motor vehicle elecyricity. Thamks for your wonderful course
Superb explanation ....................Thank you
You are a freaking genius
You have finally explained all the elements required (and their properties)for the production of electricity in a way that I can understand it. And I have been curious for all of my 53 years. Thank you!
Thank you sir. We need good teachers like you. Eye opener.
You are the guy.......
I looking for.......
Now you are my master.....
Superb
Thank you for the kind words 😀
thank you so much for doing these videos and building things like this to teach us. You are very good at what you do keep up the good videos
Good day sir am interested in your program......... Pls this is my number-+2347062261747 am a nigerian, my name is kelvin, am an engineer by profession........ I want to know u more can I have your contact.
This is my email- kelvinjka123@gmail.com.
I am so glad I looked this up in TH-cam. I am currently in a AC Fundamentals, and a Motors, Alternators, and Generators class and I was kinda lost and the way you show it while explaining it has helped me tremendously!
What a great video! You are a natural teacher :-) I've subscribed and look forward to learning more.
Jeremy, I'm an EE senior and I've been confused about how that works for years. In class we immediately go to Maxwell's equations or some equation where we have to calculate the turns, current, or something along those lines but I've never got to see how a real, usable motor works. At the end when you had the magnet under the rotor and you switched polarity, I started talking to you through the computer screen saying, "take away the magnet, take away the magnet". I needed to see for myself that the current could still be present but there had to be a magnet for it to rotate.
C Collins I agree. He makes things seem much simpler for the sake of knowledge. Love this dude.
P.S. I'm an EE sophomore and am deeply interested in this kind of stuff!
@@Anas-gc7nh Jeremy has demonstrated Faraday's Law, one of the four Maxwell's Equations.
I loved each second of your video. The way you explained the basics was too much useful. It saved me a lot of time and now I am clear of how a brushed DC motor works.
You've done a great job explaining how a motor works. I love it. I am going to show this to my wife because I think it will give her a good understanding ... If I had kids I'd be showing them as well. Thank you for a great display as to how a motor works!!!
You explain so simple... WOW
Thank you!
Wish you happy 2019 long live with health
Best demo I've ever seen of how a brushed DC motor works. Fantastic job!!!!
I hate my teachers that they couldn't do the jobs they were supposed to. They regurgitated textbook words, never making it fun. I am so happy TH-cam gives us second opportunity to learn from the best again. Thank you so so so so much. Electricity and magnetism (Physics 2) were the topics I actively tried not to study and just pass exams by choosing other topics (when we had options to solve 2 out 4/5 questions). You get my like and a subscribe. If were a billionaire you would get my $$ too.
This is my second time watching one of your videos. I commented on the first if the next one was as good as the first then I would subscribe.
I just subscribed. You are an outstanding instructor. I had a physics instructor in college that was just as good. That was a long time ago. This was fun, and I didn’t have to take a test! 😀
why isn't this being taught to kids in school. so they can invent
I wish someone had taught me this. My son's will be pros... that is for sure!
Ha funny I am researching this with some 5th graders in Beijing as part of our Expo project. They are looking at Alternatives to Coal usage and need to get a better understanding of electricity generation to understand why alternatives work and how coal is being used.
Some schools do
My school attempted too through physics but never got to look at one or build so this is much better still and I agree
HOLD IT! Your sons? Seems to me I saw a small person with *pig tails*(?) in one of your videos. What's up with that?
Thank you so much for making that cut out/away DC motor !!! I was going to ask why does it run when you put the permanent at the bottom of motor, then you put one at the top and the text on the video said, 2X the speed !!! Thank you Thank you !!!! I wish you were around 30 yrs ago, it would have helped me out so much, Ihad to find you TH-cam channel and watch your videos to make sense of ti all because my teachers, maybe tried to be helpful, but mostly confused me and probably did not know what they were talking about ! Thanks again and keep up the great work !!!
I’ve been trying to understand how the brushes fit in. Here’s a GREAT explanation of how the whole thing works!! Thanks.
Hi Jeremy! Great video, extremely helpful. Inspired by you, I've started picking up things with motors when I see them along the side of the road, taking them apart, and playing around with them. One of the common problems I have is the brushes producing sparks along the commutator. I'm guessing it's because they're not making a firm enough contact and it's causing the electricity to jump the gap. Is there an easy fix for this? Perhaps that's why people are getting rid of these things in the first place... They smell like electricity when ran!
I'll be watching with interest, thank you for all the great videos!
flashpointwhite there is. It's called replacing the brushes.
If you can find replacement brushes, that would be the first thing... It sounds like they are too short and are starting to arc.
Brush motors always make at least a faint arc when running properly. It's from the electricity transfer. When you have an abnormally large arc, it's from either the brushes being too short and causing a larger air gap to need to be traversed, a short in the motor (typically the armature/ rotor but the stator field is possible as well), or an extreme amp draw due to heat generated from overloading (bearing seizure or overtasking are common culprits) or low voltage. Ohm's Law explains the relationship between amperage, voltage, resistance, and heat and how if you change one value it affects the others.
Fantastic video!
Thank you!
You're a great teacher for kinesthetic learners. ❤
Thank you so much for simplifying the explanation of how these motors work! It's as though I can see through the motor as it works now!
I've been an electrician for 15 years and never fully understood the differences in some motors. what I want to know is if their is a motor that ran in reverse generates electricity. and fundamental differences in motors and generators
It will come as part of the series! Thanks for letting me know
Jeremy Fielding awesome video can't wait for the rest. very good at explaining things
That's great to know!. I have several older tools that are belt-driven and use induction motors, and this has helped me start to understand the differences between these and DC motors. I'm looking forward to learning more!
If you run a motor with an outside power source like a turbine or a gasoline engine then it's a generator. If you use electricity to rotate the generator to do work then it's a motor.
Would it be correct to say that the same thing is occurring but in different directions? Isn't it just a movement of electrons?
you should be a teacher
He is a teacher.
Gr888 job, only a few are given the gift to, explain, difficult to understand physics principles in easy to understand and follow tutorials. You are one of those who have that gift.
Thank you so much for articulating things I've had so many questions about. I've been a scrapper for years, before that I've had no clue how things were put together. Recently I've wanted to know WHY things work, and how I can re-use things. I've just discovered your videos tonight and I've learned more tonight than I have in a good while.
Absolutely brilliant!! Echoing others, I'm 64 and was always a bit fuzzy on motors, AC and DC. Jeremy, you have a precious gift, one that is rare to be able to unpack the concepts involved in motors and generators and in plain language along with your simple demonstrations/teaching aids, explain them. A big thank you. Please carry on demystifying the world for us less gifted but curious ones.
I just had a curiosity question about start and run capacitors and I ended up in one of your videos. You are quite articulate and knowledgable, and I was hooked. You mentioned in video 3 or 4 that you have a series of videos so I went to video 1. I must say well done. Most mechanics and electricians are hands on and prefer being shown versus reading in a book. Your tests using bench made motors and cut open housings really drive home visually what you are explaining. No music, no bs, just well articulated accurate information. I hope you are teaching this at a votech school. Thank you Jeremy.
After struggling to understand my MSc course notes on motors I stumbled upon your channel. You're a natural teacher, thanks very much!
ABSOLUTELY AMAZING&CRYSTAL CLEAR! Thank you for your work in here and for what you did! Just GREAT!
You are a natural teacher mate. Thanks.
I hope you are teaching young ones at your neighbourhood. This is great.
You are an incredible teacher. You break things down so beautifully and understandably. Your style of teaching should be the standard. I wish every high school and college was filled with teachers like you.
You are simply amazing! Thank you for all the time you take to share your understanding of how things work.
i love this stuff. i worked with electricity all my life. first i was in radio transmitter repair when i was in the air force then i had a 40 yr career as a lineman for a power company and now retired. i'm learning about how much i forgot and these videos are a great review. thnx so much.