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How transistors work – Gokul J. Krishnan

How transistors work - Gokul J. Krishnan



View full lesson: http://ed.ted.com/lessons/how-transistors-work-gokul-j-krishnan

Modern computers are revolutionizing our lives, performing tasks unimaginable only decades ago. This was made possible by a long series of innovations, but there’s one foundational invention that almost everything else relies upon: the transistor. Gokul J. Krishnan describes what a transistor is and how this small device enables all the amazing things computers can do.

Lesson by Gokul J. Krishna, animation by Augenblick Studios.

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Tags: transistors

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50 Comments

  1. Date: July 27, 2016 at 22:00
    Author: Kiki That's it

    like i have school and i'm going to drink it tomorrow and look i'm going to be a bush , can you help me by putting caculations right on comments? please help me on my learning skills so can achieve a gold reward so i can show everyone my gold,so can you help me please yeah ok
    like right on you'll be on track yo give me
    Good and coreact answers

    Reading let me know about jack the ripper

    A+ for me

    Dying for math

    Es or fs or bs any letter that not a or a+

  2. Date: August 13, 2016 at 05:39
    Author: Kelly KitKat

    umm, no, that does not make sense. Voltages do not equate to numbers. Either a bulb is on, or off. Binary code represents numbers, which in turn may equate to letters, thanks to computer memory, and programming that creates letters such as E on a screen. Ok, but voltages – or electricity – is used to power transistors flaslights computers et cetra. I find your explanation sorely wanting. And why call logic, boolean, and not simply algebraic logic?

  3. Date: August 15, 2016 at 22:07
    Author: C. Swanros

    And then, with smaller and smaller transistors there will be soon the quantum PCs

  4. Date: August 29, 2016 at 18:29
    Author: Hi Everyone.

    (Sorry my English) It's sick how humans can go from living in the trees eating bananas, to then be able to make highly advanced technology from stuff we see around us in the nature. It's almost really magic if you think about it.

  5. Date: August 29, 2016 at 22:38
    Author: Emerald Apple

    'I won't forget you I pray!' Transistors made my day..'
    Wait what was that thing called 'transerters' 'Transgeneratir?'

  6. Date: November 24, 2016 at 07:26
    Author: man1ification

    watching this on a computer feels meta….how much ever u explain with easy on the eye graphics, the fact is that this is crazy…the people who invented these are geniuses and most people like me are never going to understand how these brilliant things and minds that create them work…feeling dumb

  7. Date: December 22, 2016 at 13:57
    Author: Nak Tan

    To fans of Fallout games, Fallout is set in an alternate earth that has never invented the transistor. They only use vacuum tubes, which is why computers were huge.

  8. Date: January 11, 2017 at 21:36
    Author: ryehaaan

    i didnt know logic circuits are made of transistor… :/ and i also i didnt know each gate AND OR has thier own name haha. thanks ted ed now i know 🙂

  9. Date: January 18, 2017 at 05:29
    Author: Ajay Penmatcha

    Why am I watching this at 1 in the morning when I have a college final I have barely studied for tomorrow

  10. Date: April 27, 2017 at 01:32
    Author: tygonmaster

    The HIGH and LOW voltages thing is a bit misleading here. Yes, 1 is typically a high signal and 0 a low one, but it depends if the system is active HIGH or active LOW. In other words, 0 can be HIGH and vice versa. Additionally, LOW is very rarely represented by a voltage of 0 as how does one know if the machine is working if there is no voltage? It is doing the same thing it is doing as if it is off. As such, LOW is usually a voltage of 1V, 2V, or some other lower voltage (or, again, HIGH can be represented this way as long as you are consistent.) You just need a difference in voltage for the system to work. Just a fun fact for everyone. 🙂

  11. Date: May 26, 2017 at 22:49
    Author: Warren Day

    So when a charge passes through a transistor this can be determined as a 0 or a 1 creating binary; but what is actually controlling the voltage? How is it turned on or off?

  12. Date: June 5, 2017 at 16:23

    i studied it in electrical engineering for about 4 years total. And now they compressed it into 4.53 minutes video, amazing LoL

  13. Date: June 20, 2017 at 14:58
    Author: Vishwa Mithra

    Didn't you miss the part at 3:50 to 4:10, you comfortably skipped the logic behind the switching. And the animation is inaccurate, as it showing the electrons being stopped at the base emitter junction and not the base collector junction. Sorry but what my books told me was the base and emitter in this configuration are always forward biased. Please correct me if I had made a mistake(Regardless the animation is outstanding).

  14. Date: June 20, 2017 at 21:24
    Author: TheFunnyBuddy

    What makes computers tick?

    Broken components. You shouldn't be hearing ticks from your computer.

  15. Date: July 13, 2017 at 13:51
    Author: Simple Brian

    This was the one device that was never invented in the fallout universe… If memory serves, No pun intended

  16. Date: August 23, 2017 at 07:07

    Didn't Tesla invent the transistor? Or at least had the basic idea in his patents

  17. Date: September 20, 2017 at 22:49
    Author: Alden Weaver

    I have always wondered why a computer even knows what an operating system tells it

  18. Date: October 19, 2017 at 23:18
    Author: jess jesse

    1: bassiccally transister are made of : zinc & copper & silicon = 3 diferent tiny plates ! Which plates doing what & power volt? Right dude?

  19. Date: October 19, 2017 at 23:19
    Author: jess jesse

    1: wholly circuitboard = copper & silver & gold & zinc dreads! Called magnetic-powers out your nature !

  20. Date: November 30, 2017 at 06:56
    Author: DowSofGames -

    I still dont get it, why do you need those logic gate and what create the bits

  21. Date: December 1, 2017 at 18:20
    Author: blesyl67

    As a person who is currently studying Analogue Electronic and Digital Electronics , your animation and information on how Transistors work is 10x better than what my college teaches us . Hope you could expand more into this topic !

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