An Introduction to Logic Gates

[@catteyisaboar4241]

I am 67 years old and finally found a clear description. all of a sudden I not only understand how gates are made but I no longer fear flipflops. you are on of the two amazing teachers I've had the pleasure of listening to.

[@seanocansey2956]

I think this is the best description of this I have ever seen!

[@minesupermario]

+Sean Ocansey Agreed

[@poovithanvasikaran4067]

But I think for beginners that's at first a good description.

[@hugo72charles]

This fellow is very good in his explanations. Some people are hopeless in explaining even if they understand the subject themselves.

[@TheDarkwolves1]

To speak for so long with such an outstanding will to make us understand.. I thank you sir for your videos are really helpful to me :D

[@axiom2250]

You are the best teacher i have ever seen. I had trouble to understand how to make a basic computer from logic gates, and how the circuit is basically made. Now it's a lot clearer.

[@brianpacker2788]

Thank you so much for making this video. Better than 99% of TV programs.

[@udaytejakonde]

i loved the whole video, understood each and every part clearly,excellent explanation

[@DrPhysicsA]

Thanks

[@jwhiz3219]

Very clear and well articulated explanation of Logic Gates. Thanks very much for making this video! As far as I am concerned, you hit a home run on this.

[@ColonelDecker001]

I particularly appreciate the fact that you did the whole thing in one take and left the mistakes in (and highlighted them with comments). Makes you human and even more accessible. Well done. Great stuff.

[@Naz-yi9bs]

Thank you for all of your channel! Just came across it and I'm in heaven, so much to learn and your style is very detailed, I'm lucky, thanks to you.

[@charlesyoung1780]

You're a hell of an instructor the way you bring the information down to a beginner's level is amazing it's very hard for me to learn complex concepts but you broke it down and made it palatable you're awesome thanks

[@crytman1]

The best explanation ever of logic in reference to transistors. Never thought I could have understand this so clearly as I just did. You are wonderful.

[@frgmntTOB]

I am so glad you corrected your little mistake at 10:12. This morning I woke up with your video about the physics of black holes, hawking radiation etc. after going to sleep with a science fiction short story and accidentally having autoplay on. I immediately loved your style of explanation. Subscribed!

[@jkuebler89]

My goodness thank you a million times over good sir, like everyone else here commenting this is by far the best explanation I've come across, leaps and bounds. Super clear and concise, no one else can touch this level of quality. Alright time to remove my nose from your rear and back to studying.

[@DrPhysicsA]

Essentially they detect any changing voltage on the input. They then react accordingly.

[@DrPhysicsA]

When there is an input voltage, the transistor behaves like a closed switch. So all of the points from the ground position up to the resistance are at 0V. This means that there is no output voltages to drive the light emitting diode.

[@JO-mg6xc]

Dear Dr. Physics A: Thank you for theses videos, they are a fantastic way to understand logic circuits. You are a great teacher. I love the pre-traced board, so no time is wasted.

[@redmartians]

This is the most precious 50 minutes I've ever spent! Great stuff!!

[@kieranmitchell8785]

Computer Science student here, I just want to say that this video was unbelievably helpful. You've explained it far better than my lecturer did.

[@dabulls1g]

Easily the best instructional video on the subject for KZbin. Your materials is incredible and your knowledge is unsurpassed, excellent work.

[@varunadesilva2930]

Excellent Tutorial. I was just brushing up to go through with my son as he is doing GCSE this year. I will be asking him to go through this by him self now. thanks for the valiant effort, well constructed, simply explained.. thanks very much

[@martyhastings9347]

I will not "say" my age, but when i was in school, non of my professors where as good as you where in this video. most times we used the truth tables (supplied by the chips manufacturer) to pick the required component with the desired output for our circuits. great refresher class. thanks.

[@kpmaynard]

What a lucid presentation!! I would take every one of your classes. Thank you so much.

[@samadkhan6934]

when u made play ground to teach us about logic gates and finished it, i paused the video there............ and gave a like first before going on. your way of teaching is excellent, sir! Thank you! :D

[@dav625]

Don't know how you do it, but you got it through and through - clear, well expliciet. A subject complicated to understand by other lecturers, suddenly seems so easy.

[@iftakharalam1650]

One of the best lecturers, i have watched and took notes in my life.

[@yaputrajordi2568]

Thank you so much, sir. I'm just a senior high student who loves to play minecraft. But now I understand one or two things about logic gate, thanks to you. At the first time, I watched your video and paused it right after the nor gate explanation. I thought that you would explain the next two gates with transistors too... So I tried to figure the rest of it myself and after 3 or 4 days, it worked. 5 transistors and 2 diodes each. After I watched your video one more time but until the end of it, now I know that I have can do many things with logic gates in minecraft. Thankyou so much, sir.

[@GrigRP]

Do the needful sir

[@mehmeterenortak]

idk how many videos I have watched about logic gates but this one is the best thank you a lot sir

[@jameshanley9102]

we did all this stuff in my hnc course at college i flippin love this stuff its great what you can do with logic gates really . and this guy has put it in a very good manner of understanding too

[@martinmadsen1199]

Thank you for taking the time. The pace by which you introduce the material is perfect.

[@freakdog9090]

very helpful video for someone who hasn't touched on electronics for a long time, thanks for descriptions and visual aids, also the construction using transistors was completely necessary for my needs! keep the videos up!

[@Mahp46]

Sir, you've done a great job explaining it! Now I find the very idea behind logic gates just so beautiful. Thank you very much!

[@swethadeepak3029]

AN INTRODUCTION TO LOGIC GATES USING TRANSISTORS AND VERIFYING TRUTH TABLE:---- SIR LIKED YR ABOVE VIDEO VERY MUCH. YOU HAVE EXPLAINED SO WELL HOW TRANSISTORS ARE CONNECTED TO ENABLE DIFFERENT GATES. YOUR EXPLANATION IS VERY CLEARLY AUDIBLE AND THE DISPLAY ALSO VERY CLEAR. NO DOUBTS AND ALL CLEAR. YOU ARE A TEACHER OF HIGH CALIBER AND I APPRECIATE YR ABILITIES. THANKING YOU VATSA INDIA

[@mr.woowoo8826]

I'm in school for electronics and I wanted to learn about logic gates, so I chose your video and was going to sub you, but already had!!! AWESOME!!!

[@reliefguitarist]

This is hands-down the best explanation of this I've found. Thank you!

[@srivatsaa.r.9936]

sir yr video on AN INTRODUCTION TO LOGIC GATES Is outstanding. yr EXAMPLE OF two circles over lapping each other and finally explaining each logic gate using two transistors is praise worthy. u did full justification to the topic. thanks yours s.vatsa

[@fredflintstone3956]

This is brilliant! I wish you had been one of the instructors when I was trying to learn all this back in the 80s in the Navy. The only way it finally hit for me was reverting back to my knowledge of plumbing, with pipes instead of wires, flow restrictors (orifices) instead of resistors, and spring-loaded valves in place of transistors.

[@Caozonsi]

Wow I just lost 47 minutes, I don't know how I was sucked in but it was time well spent. Very well done video. Detailed without being to complicated. Very informative. Thank you very much!

[@ThousandStars1000]

My friend has been doing computer science gcse for months now but I think I just learned more than him in 40mins. Thank you.

[@mukundvs7635]

the beest logic tutorial i've found on youtube till date

[@sammys222]

there are many many books out there and websites... but it is this video that gives a thoroughly simplistic explanation of how this works! thank you sooo much!

[@cherchetutrouve6056]

my opinion ,you are the best , you have a voice of a teacher , thank you verry mutch ,sir .

[@Niaengineer]

wow.simply amazing. this has seriously ignited an interest in me ,for this subject.thanks professor.

[@bendoherty7721]

Thankyou for taking your time out of our precious lives with never enough time to gives us something to learn from

[@anapaulinacabrera]

ohhhh my good, this was by far the best transistors video I ever watched, so easy to understand, thank you!!!!

[@robandkriss6946]

It's been forever since I had to deal with gates. I have a project that I'm working on and I needed a refresher course. THANK YOU VERY MUCH for making this video. You explained it VERY WELL and even showed how to make it with simple components. (which would be my next step on my project) I only need 1 and gate. I'll give you a like and subscribe sir!!

[@mazengomaa27]

Man, in the past i had a big problems with logic but now i love them Thank you

[@adandridsr]

Excellent presentation. No nonsense, straight to the point, clear explanations. Will be viewing more of your vids if available. Thanks you very much.

[@liamduncan09]

Brilliant at last a person who speaks British English and can deliver in a clear manner enabling me to understand as I listen more of the same quality please. I feel the need to study more and that is the frame of mind a good teacher should leave a student in as I said Brilliant.

[@mohdfm]

Best Description Of how logic gates work, being an IGCSE grade X Student, It was really helpful. Thanks You +DrPhysicsA

[@williamwelmans3026]

Excellent teaching video. I learned more in your program then I did in my first year at college. Cheers !

[@nikofox8652]

Very good video! It's good to know the principles of logic gates, which are the base of integrated circuits. Also, I've learned the feautures of and why the transistors are so much important. Thank you! I appreciate your work and will come to see more!

[@martinneave6484]

Very clear, precise, accurate and enjoyable demonstration. Thank you very much.

[@ClassicContent]

This is amazing, you have made me realise the true utility of what we do at school. You are doing some great work.

[@mk1cortinatony395]

Awesome description here. I found this randomly looking for what makes up the AND and NAND gates internally and you have it covered nicely. Thank you :)

[@desideriobanzonjr6771]

Very brief and concise. It adds my idea and understanding to these logic gates way back in college days.

[@tomthumb3085]

This is my favourite subject. Brilliantly explained and demonstrated. Great video, thanks.

[@tomthumb3085]

Excellently explained. First class teacher, well done.

[@williamroldan2830]

Very awesome explanation. This is the only time I undertand this. Very well explained...

[@peterdavies1160]

Thanks very much for this clear and logical explanation which builds over the course of the video to offer a coherent explanation.. I found it a great help! I am always amazed at how arrogant a few people can be when they criticize and 'grade' your effort. They clearly haven't tried it themselves and have no idea what is involved!

[@ashikpanigrahi]

i think ive not seen a teacher as good as you........thanku

[@davidshanlay]

If I found this channel about 20 years or let it be 15 years ago, I would not lost my mind much. Now I miss my mind a lot.

[@pacrat90]

What a great video! Watching this and fiddling on my circuit simulator on my WP8 phone helped me to understand how these gates work and gave me a better understanding of NPN transistors too!

[@urbantrend8588]

you should be a nobel prize winner.. this explanation is superb an wonderful compared to lecturers and other youtube videos .. i think that explains your number of views as it is the highest.

[@lblmer]

One of the best videos on youtube. Enormously informative.

[@geoffreyghunney821]

the best tutorial on logic gates ever from scratch

[@latengocomoburro]

I have been looking for this information for years. Literally.

[@ba5916]

this video is so descriptive. now i understand so many things that have been confusing,thanks a lot

[@DrPhysicsA]

Remember that a transistor is essentially a switch. If a voltage is applied at the base then the switch is closed, if not then the switch is open. (The start of the video explains why). If the switch is closed then it is as if the output were simply a direct connection to the ground 0v. That means that the output is at 0v. If the switch is open then the output is connected to the 5v through a resistance.

[@juni172]

Perfect explanation, this intro could not have been better.

[@svjplumbing]

Very good lecture. I've been looking for an answer to how computers work. This explains in a very simple language. Thank you very much sir.

[@ananditasharma3751]

sir I am in the midst of this lecture.....and I couldn't wait to thank you....... really thanks alot for your efforts.👌👍

[@rayfranco1256]

THIS IS THE FINEST EXPLANATION ON THE SUBJECT ANYWHERE

[@hakanerten6597]

Very clear and more comprehensive than any other similar videos. Thanks a lot!

[@yamnjam]

I needed this refresher course. It's not an easy subject, but well worth the study.

[@Hwyadylaw]

At 6:38 It's really a NOR (Not-OR), because it's neither red jackets NOR black shoes

[@KingKombatant]

McDucky don't be that guy

[@burt591]

@@KingKombatant You mean don't give constructive criticism?

[@ydonl]

@@burt591 Yes! Approximated logic will be quite sufficient! Unless you want correct floating point results, of course. Or unless you want any of your designs to work right. But at least they'll feel good about themselves.

[@ZHEER]

Dude you have no idea how much you helped me, i was going crazy 'cause i didn't know why transistors were useful but at 44:36 you answered me thanks!

[@amyfrost3790]

Thanks bud. I needed to learn how this works so I can make a full adder. -Great video!

[@M4dSc1ent1st]

This is an awesome tutorial - thanks for putting it together!! Note, however, that the AND gate at 25 minutes doesn't work in practice. Transistors allow the voltage from the base to flow through the emitter, even if there is no voltage at the collector. So if input B is high, then the output will go high. Breadboard it and you will see... So far, the only working AND I've been able to make is a NAND plugged into a NOT. :)

[@SpencerCornelia]

Thanks x1000 for this great video

[@ionciubotaru2696]

I have always wondered how a computer is able to make a calculus and now I know. Thank you very much! :D

[@farsidekiki]

THANK YOU! This made logic gates sooo clear and straightforward.

[@Space-Industries]

Excellent explanation, thank you. I took an electronics course a year back... Wish I had found this video back then. If I could, I would give this video 5 thumbs up :)

[@thebrakshow7415]

Wow, that was a fantastic lesson. Wish this was around 5 years ago when I was in college learning logic gates.

[@joshpiatt4906]

Thank you so much this helped me a lot, you are really descriptive and you explain everything in detail. Right now I am studying logic gates and this video help me so much. Thank you again!

[@p8l8q]

i have a final exam tomorrow, its all about logic gates, Boolean, k map, full and half adder, latch and flip flop, binary decimal octal...etc numbers. I hope i can pass my results isnt that good until now. thank you for the information i got from you and i hope i can get the rest of the informations in your channel +1 like and +1 subscriber sorry for my poor english and Thank you again

[@МаксимПетров-м8к]

Some question about AND gate 25:29 If there is the voltage of input B ( with no voltage of input A), and the resistance of the transistor(base and collector) is low in comparison with the resistance of the resistor, doesn't it means, what it should be output voltage approximately equal to the voltage of input B?

[@TechTiger1007]

Great explanation !!!! I am trying to build a power supply that a can charge a set of batteries as well as run a 7" monitor and a raspberry Pi. This helped me a great deal. Thanks

[@alexc2081]

Wow... what an inspiring lecture. So straight forward that I can understand just with seeing!

[@estetikayakkab2948]

I have blind downloaded your video in the morning , then i watched and i back to say ''Thank You''

[@e12314]

Thank you for this video. After having watched many others about transistors, I finally understand how it works thanks to this one and the atmoic physics 3.

[@mikeg2be]

Dude You are the best illustrator... WOW

[@themvlek]

This video is exactly what I was looking for. Thanks.

[@chillhomie7]

Thanks alot for this video this is the only unit in computer engineering where i didnt know wtf was going on..

[@nathg1990yt]

Great videos, Needed to understand the more physical workings of logic for computer science, was a bit more detail then I needed on the transistors video but was good to get an idea of how they actually work rather then just take things for granted.

[@abuzaid94]

you certainly explained this better than my lecturer, thank you sir.

[@rvd2339]

Thank you for a very thorough and clear explaination of this subject.

[@MartitaMaima]

i understand it better than my lecturer, thanks so much sir!

[@김승환-g3c]

Now, I totally understand how logic gate function!!! Really Thank you for letting me know it!!!

[@absalomakonyo5064]

A great lecture worth several views. Thanks dude!