Boolean Logic & Logic Gates: Crash Course Computer Science #3

Boolean Logic & Logic Gates: Crash Course Computer Science #3

Today, Carrie Anne is going to take a look at how those transistors we talked about last episode can be used to perform complex actions. With the just two states, on and off, the flow of electricity can be used to perform a number of logical operations, which are guided by a branch of mathematics called Boolean Algebra. We’re going to focus on three fundamental operations – NOT, AND, and OR – and show how they were created in a series of really useful circuits. And its these simple electrical circuits that lay the groundwork for our much more complex machines.

*CORRECTION* AT 1:27 the graph says “Quinary System” but then the graph shows 10 possible states – which is actually decimal. Technically, there should be only 5 possible values there, but the overall concept is still the same.

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50 Comments

  1. Foster Lindsay on March 1, 2020 at 10:27 pm

    I did not understand anything through here… 7:52-8:29



  2. शिवलाल चौधरी on March 1, 2020 at 10:30 pm

    धन्यवाद ।



  3. ana magherusan on March 1, 2020 at 10:34 pm

    I think you missed the XNOR gate.
    True + True = True
    True + False = False
    False + True = False
    False + False = True



  4. David Taylor on March 1, 2020 at 10:34 pm

    You are amazing. I have always been fearful of this information. I see now i was fearful of the instructors. Where you are concise, cheerful and fun they were scattered, drool and resentful. Thank you for knowledge!



  5. S H on March 1, 2020 at 10:39 pm

    HIDE those UGLY TEETH! Or buy a toothbrush and some Crest.



  6. Sub2me If u laughed on March 1, 2020 at 10:42 pm

    Aww maan



  7. Richard Bergin on March 1, 2020 at 10:43 pm

    You’re talking a bit too fast without pausing for breaks, it’s a bit hectic to listen to this. Otherwise i love this series



  8. Shkar H Sardar on March 1, 2020 at 10:46 pm

    wow it is really amazing



  9. Jay Berkovitz on March 1, 2020 at 10:46 pm

    I know it’s wrong to objectify you, or make any comments about gender because it shouldn’t matter… but… our children would have such an advantage in life!



  10. Clarkeeo on March 1, 2020 at 10:49 pm

    If I was to show another alien species what a nerd is I’d have him watch this series.



  11. AAPlayz on March 1, 2020 at 10:49 pm

    You make such an AMAZING Teacher! You really helped All Of Us. Keep It Up!



  12. Jifk Wiorkt on March 1, 2020 at 10:50 pm

    British Accent makes me understand more



  13. jemsncrystals on March 1, 2020 at 10:52 pm

    I am still confused, i mean i get it all the binary and 0 and 1s. But i dont understand one basic thing that is missing in this series.
    You told that from the early start if the mechanical computers. There was a HUMAN that flicks the switch/ connects the wire/ or punches in a punch card to say to add 1+1. Right that was human intervention. But what i don’t understand is how in modern computers that gate voltage is applied to the transistor? What automates that? Please answer…



  14. Krishna Rajan on March 1, 2020 at 10:53 pm

    Wow,
    I love this video😀



  15. Sean Taylor on March 1, 2020 at 10:53 pm

    Creeper!!



  16. utubecorporatetroll on March 1, 2020 at 10:54 pm

    These videos would be better if you didnt talk so fast



  17. Goku supersaiya on March 1, 2020 at 10:54 pm

    do u have oxygen tank in your body? because you talk very fast



  18. Conner Buxton on March 1, 2020 at 10:55 pm

    Very helpful



  19. Jin Shikami on March 1, 2020 at 10:55 pm

    Can anyone test this out and give feedback? Type: androidcircuitsolver/app.html



  20. Green Leaf on March 1, 2020 at 10:56 pm

    You did that in just 10 minutes what my teachers couldn’t in 10 years.



  21. AR 551 on March 1, 2020 at 10:56 pm

    i want a sister like these…. 🙂



  22. bohartz apprentice on March 1, 2020 at 10:57 pm

    this chick is smart as hell, i’m guessing shes some kind of electrical engineer.



  23. Shadow X2016 on March 1, 2020 at 10:57 pm

    Wow hands down you made this 100% clear to me. Now I can go to my class tomorrow with all this exclusive knowledge haha! Many Thanks from your local Westminster Kingsway college student studying BTEC Engineering Level 3 ^^



  24. Student Gary Smith on March 1, 2020 at 10:58 pm

    video starts at 2:36



  25. Jigyashu dev on March 1, 2020 at 10:59 pm

    Loved all video



  26. lee1davis1 on March 1, 2020 at 10:59 pm

    Fun!



  27. Jeevan Kumar Reddy Ravuru on March 1, 2020 at 11:00 pm

    Nice video 👍



  28. YAHAO XING on March 1, 2020 at 11:01 pm

    08:37 how cute 🥺🥺



  29. Seyienei Meyase on March 1, 2020 at 11:02 pm

    @CrashCourse 8:28, shouldn’t true AND false be true??



  30. জয়দীপ দাস- খেসারীর ফ্য়ান্সদের বাবা , chemistry king on March 1, 2020 at 11:02 pm

    nice



  31. Ali Zaidan Thamyeez on March 1, 2020 at 11:04 pm

    if you are a minecraft redstone person you will recognise what she is talking about



  32. AGS-TECH Inc. - Custom Manufacturing on March 1, 2020 at 11:08 pm

    Great summary of some basics on logic gates. I am amazed by the speed of Carrie Anne’s reading and diction.



  33. Ah La on March 1, 2020 at 11:08 pm

    Can someone summary thid video for me? 🙁



  34. dkFreeze on March 1, 2020 at 11:09 pm

    Not, and and or. My favorite sentence.



  35. fetuspiss on March 1, 2020 at 11:09 pm

    who else has their ap comp sci midterm next week lmaoo



  36. Charles Marincowitz on March 1, 2020 at 11:10 pm

    Her name is John Green?



  37. Виктор Хуго Алварез Дамaссено on March 1, 2020 at 11:11 pm

    Amazing



  38. ANURAG on March 1, 2020 at 11:11 pm

    You speak too fast, but you’re excellent



  39. JULIA TUTTLE on March 1, 2020 at 11:11 pm

    Bet she can’t wear Brandy Melville. DISLIKE!!!



  40. Mike Merriott on March 1, 2020 at 11:15 pm

    Intelligence is sexy.



  41. Olivia Dearinger on March 1, 2020 at 11:16 pm

    Carrie Ann you are awesome



  42. Aro Bot on March 1, 2020 at 11:17 pm

    This is amazing. Thank you!



  43. CrashCourse on March 1, 2020 at 11:19 pm

    *CORRECTION* AT 1:27 the graph says "Quinary System" but then the graph shows 10 possible states – which is actually decimal. Technically, there should be only 5 possible values there, but the overall concept is still the same. NOTE: Since we can’t use annotations in our videos going forward if we find any smallish errors in our videos like this we’ll leave clarifications in the episode description. Thanks all for the wonderful feedback! -brandon



  44. Humphrey Parker on March 1, 2020 at 11:19 pm

    i love this video, its prety much helping me best understand logic gates and many thigs about computation. But you speak too fast and i keep going back to actually hear what she says.



  45. Santiago Carrion on March 1, 2020 at 11:20 pm

    lmao



  46. S H on March 1, 2020 at 11:21 pm

    Sorry Brit girl, your logic is flawed. There are 3 or more states: TRUE, FALSE, MAYBE. Thus QUANTUM logic.

    Wake up caveman Brits!



  47. Abdirahman Farah on March 1, 2020 at 11:22 pm

    very nice lesson ,thank you madam am a somali am doing a degree in computer science



  48. Account 01 on March 1, 2020 at 11:22 pm

    Who realised that there is a creeper behind her back? Like if u think so.



  49. 45ThumbsUp on March 1, 2020 at 11:23 pm

    I guess computer science really is "black and white"



  50. INFINATE IBRAHIM on March 1, 2020 at 11:23 pm

    Where is hank