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Intro to transistors

Intro to transistors



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In this video we take a brief look at NPN BJT transistors. Is it a switch, or is at an amplifier? It can be either...

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11 Comments

  1. Date: October 10, 2017 at 21:41
    Author: gartmorn

    Good explanation. Air conditioning! Wow! Not hot here I'm afraid!

  2. Date: October 10, 2017 at 21:43

    I'm waiting for the MOSFETs! I understand them better every time I watch a good video.. but I really need help picking a good FET. the data sheets really get complicated. the more I read the mor questions I have. is there a MOSFETs for Dummies book? great video

  3. Date: October 10, 2017 at 22:13
    Author: Michael Eckl

    Great video as always! Looking forward to the video on MOSFETs! What about an introduction to op-amps as well?

  4. Date: October 10, 2017 at 23:04
    Author: George Chambers

    Really good transistor tutorial. Now about PNP transistors? Thanks for the video.

  5. Date: October 11, 2017 at 02:43
    Author: Digger D

    Don't ya hate it when people don't get nerd jokes? Like common, read a technical book will ya! 😉

  6. Date: October 11, 2017 at 14:56
    Author: stewartrv

    Not a criticism since the explanation is the standard one in most books. But I used to really struggle with this explanation of how a transistor works since it didn't make sense to me given that its basically like two diodes back to back. (I delved deeper now and I got it). What I struggled to comprehend was how does current flowing from base to the emitter enable current to flow in the "reverse bias diode" of the collector and base junction. So if you can do a follow up with that part in more detail I think it would help people understand why you can't make a transistor by simply connecting two diodes back to back!
    This was helpful for example: https://youtu.be/7ukDKVHnac4
    And of course Dave's Video: https://youtu.be/qUeK7pHe0rI

  7. Date: October 11, 2017 at 22:57
    Author: Dan E

    on the Transistor as a switch part can you explain how what is goin on is different than just having the same circuit without the transistor? It seems that if you change the wire from ground to power the LED will light with or without the transistor, likewise with the potentiometer it would get brighter with or without the transistor.

  8. Date: October 12, 2017 at 23:46

    I'm going to view your MOSFET video shortly but this was a great introduction. Like another commentor mentioned, this can be tough to grasp. Correct me if I'm wrong but (…something that confused me for a while…) saying a transistor as an amplifier is a bit misleading, in the sense that it doesn't create power from nothing. The source of the amplification is not the transistor but the higher voltage supplied to the collector. The transistor just allows that higher current to flow. Do I have that right?

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