BJT Transistors - Electronics Switches and Inverters

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This video tutorial explains how Bipolar Junction Transistors can be used as electronic switches and as inverters. As a switch, a small current flowing into the base can be used to activate a larger current flowing in another circuit. As an inverter, it flips the output state. If the input is low, the output will be high. This video also explains how to use ohm's law and kirchoff's law to solve a simple NPN transistor circuit.
Transistors - NPN & PNP:
• Transistors - NPN & PN...
Night Activated LDR Sensor Circuit:
• DIY Night Activated LD...
Finding The DC Load Line & Q-Point:
• Transistor Base Bias C...
Voltage Divider Bias Circuit:
• Voltage Divider Bias C...
Collector Feedback Bias Circuit:
• Collector Feedback Bia...
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Emitter Feedback Bias Circuit:
• Emitter Feedback Bias ...
Common Emitter Amplifier:
• Bipolar Junction Trans...
Common Collector & Base Amplifier:
• Common Collector and C...
Darlington Pair & Beta Current Gain:
• BJT Transistors - Darl...
Class A, AB, B, & C Amplifier Circuits:
• Transistor Amplifiers ...
Voltage Gain of Transistor Amplifier:
• How To Calculate The V...
_________________________________
Multistage Transistor Amplifier Circuit:
• Multistage Transistor ...
Transistor Audio Mixer Circuit:
• Transistor Audio Mixer...
Operational Amplifiers:
• Operational Amplifiers...
Summing Amplifiers:
• Summing Amplifiers - O...
LM386 Audio Amplifier:
• LM386 Audio Amplifier ...
LC Oscillator Tank Circuit:
• LC Oscillator Tank Cir...
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Опубликовано:

4 окт 2024

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Комментарии : 125

@TheOrganicChemistryTutor 8 месяцев назад

Final Exams and Video Playlists: www.video-tutor.net/

@tylerherman5933 4 года назад

Been using your videos since 9th grade. I'm now in college and I still refer to your videos multiple times a week. Thanks so much for your help over the years. I appreciate you and your content so much. Thanks for all you do.

@beyourbest5253 2 месяца назад

In my search for lessons on how transistor work in an inverter, yours is the best I have found.... Thanks so much....

@majo_vega__ 2 года назад

I am literally going to get my degree in civil engineering because of you. You're huge man thank you so much for your service

@K-TRIX Год назад

how are you doing civil engineering and watching videos on transistors?

@Anon.G Год назад

@@K-TRIX maybe first year is general

@abbeyzondo 3 дня назад

Your videos are addictive. Thanks for sharing your knowledge.

@itsyaboybinnybenis8011 Год назад

Thank you sooo much for making these videos, science can be really simple if it is explained with care and you do just that sir!

@jayachandra677 4 года назад

The best explanation I've ever seen in my life. Thank you!

@pixelberrychoicespodcast5861 3 года назад

Thanks, I wish I could take lessons from you in person,, And I've found you when I was in 11 th grade my marks would've been off the charts, no teacher Ever taught the topics like you do, I used to think of this as scary tough stuff, but you made it look so easy and funny and I'm now enjoying it ... A teach like you is hard to come by... Thanks teach,

@Felix-q8z Год назад

I always wanted to meet a Teacher like you, so to answer my questions.

@charlesrippert300 2 года назад

Brilliant! Perfect! Never got it expained like this; but only now I understand! God bless you!!! Many many thanks!

@kabandajamir9844 2 года назад

The world's best teacher ever may God reward you all my success is attributed to your good explanation

@angelamawia8844 3 года назад

great teaching i like all your lessons ....your explanations make complex problems appear so easy ,thank a lot sir. A big salute.

@loltwest9423 6 месяцев назад

Weird how I feel nostalgic for this content.

@JT-qc9ih 3 года назад

I wish he made videos on TTL ECL circuits with problems included it would help so much right now for digital electronics

@bendv18 Год назад

Yes. Need ttl videos!

@solomonglenda6811 3 года назад

Thank you so much dude😩 I’ll pass my exams well because of you.

@PunmasterSTP 3 года назад

How did your exams go?

@PunmasterSTP 3 года назад

BJT? More like "Big information, for free!" Thanks for all of these wonderful, free videos.

@lemuellongatang7784 3 года назад

Thanks sir for a clear explanation… God bless

@blessedtembo9858 4 года назад

U are such a great tutor. Would like to see your real face someday do post a video showing your face ....

@ronaldruizdeluzuriaga2649 3 года назад

His name is Julio Gonzalez. Look it up on google. There’s only one pic tho

@amanihd5476 4 года назад

I just want to thank you for helping me.

@jakep8484 6 месяцев назад

In the video it comes off that the collector current will follow the base current multiplied by beta but really it just determines the max amount of current flow that you will be able to have flow through the collector. The load determines the actual amount of current until you hit that maximum amount.

@klan_dyke1779 4 года назад

Thankyou so much for providing, Due to extreme family problems and issues with school, your videos are the only source I rely on and I am very thankful for your efforts. You have really helped me in time of needs and your lessons motivate me to study and ignore all my problems. Please keep your channel running so it may shield many more students that may have problems in life. I can only say thankyou and I really appreciate everything you've done for me and others. ❤️

@srimanprabhu1585 Год назад

thanks ever so much man .. love all your vids ..

@alvinlooc39 2 года назад

Have a nice day sire ..

@meekdenzo7649 3 года назад

This dude’s channel is what we thought khan academy was 🙌🏽

@olaoluwaomopariola4867 3 года назад

Are you seriously comparing this guy to Khan academy? Because something is seriously wrong if you are. He clearly doesn't even understand what he's trying to teach, just memorised the solution for the video or something. This isn't how a RU-vidr would teach if he understood what he was teaching. You only need to watch other videos to see that much. Maybe you should watch Khan academy India for class 12. It's a billion times better than this guy's stuff. That guys explanations is the absolute best. And there are even other random electronics videos that are wayyyyy better than this.

@33samogo 2 года назад

The ß is clear now, it can be 100% or 0, thank you!

@michalpelic6169 3 года назад

Video for MOSFETs please. You are awesome!

@marwasolh9449 Год назад

Many many thanks

@prashanjitghosh5861 4 года назад

God blessed u are.. amazing explanation

@justinjongsoohwang882 3 года назад

Thank you so much! It helped me a lot

@0dbm 2 года назад

Very well done , very well

@randomguy6150 3 года назад

Thank you so much for this! Will be doing any videos on MOSFETs?

@garyvillar8992 Год назад

Hey you should make videos going over mosfet problems like NMOS and PMOS

@tony3387 3 года назад

Thank you very much

@maximumrelaxed 3 года назад

incredible....Salute

@rushaharri7875 4 года назад

thank you for this video. Can do a video on operational amplifiers before may please. It would be a big help thank you

@marwasolh9449 Год назад

The besttttt!!!!

@emmanuelfosu1226 3 года назад

God bless you

@doranharris3052 2 года назад

thank you!

@yasirmahmood1 2 года назад

please make some videos on FET mosfet dia traic

@dianafrancess7776 3 года назад

Can you make a video for FET please. I learned a lot from you videos

@vikasgurukulandtech140 4 года назад

Good lecture sir teach about IIT topic India entrance exam

@lankytv3990 4 года назад

Nice video💯✌

@johnnyjohn9134 4 года назад

You are great!

@Huhdarren 2 года назад

Hello sir can u do a video on MOSFET?

@gassanali8667 4 года назад

Awsome! Your explanation of the basic inverter circuit is absolutely easy to understand. Is it possible for me to get the same results if I provide the base signal voltage with a few AA batteries? I can put three of them in series to arrive at 4.5 volts. For the collecter, I'll use a 9 volt battery.

@PunmasterSTP 3 года назад

I think that should work.

@mehmetmehmeti5639 4 года назад

been with this guy for 5 years and i still havent seen any peice of his skin. Did not know genius ppl are shy. PLease JUST tell us a pic of ur face dats all.

@TheDagger55 4 года назад

"PLease JUST tell us a pic of ur face"

@drenibrahimi1300 3 года назад

His name is Julio Gonzales, look him up. You're welcome :)

@ritesha8050 2 года назад

thx

@Mulazim. 2 года назад

Bravo 👏

@Spongi_NA 4 года назад

Hello Julio! Do you think you could do some videos on Double Integrals with Polar Coordinates ?

@unicornway7184 3 года назад

How did you get the 0.6v? pls show me the formula. thks.

@jaimesilva1990 3 года назад

Hello. At the transistor, the Base Emitter junction acts like a diode in forward biased mode. It means that around .6 to .7 volts is dropped across it when it is allowing current to flow from the collector to emitter. This is how Diodes work. The emitter is connected to ground, so there is 0V at the emitter, which means that the Base voltage must be .6V or .7V.

@riaank.4585 8 месяцев назад

In the 2nd scenario with the inverter, asuming Uce=0V, then B=Ic/Ib=(9V/1kOhm)/[(5V-0.6V)/10kOhm]=20.455, thus much less than B=100...300.? - Can you explain (again) why exactly this is needed to be like this? - In another Video, amongstthe comments I found an answer: Here we are using the transistor as a switch, not an amplifier. To saturate a transistor, a high enough base current is required, In the equation Ib=Ic/beta you can actually assume the beta value to be low so that the base current is higher. Also, as the beta value changes with temperature, taking lower beta value solves temperature variation problems So this means Beta can sort of just be asumed as some random value, as long as it's well below the actual Beta of the transistor? - Isn't that dangerous if one chooses Beta too low as the transistor can be destroyed by too much base current??

@markfinn825 Год назад

By telling us exactly what type of transistor you used (such as a 2N2222) we would be able to check your work by measuring with a meter.

@graciousdimond 2 года назад

Hello. Can you explain how the 6v becomes 0.6v at the base voltage

@jacobvandijk6525 2 года назад

@ 8:43 It's a difference in potentials, not in potential differences.

@عبداللهمقابلة-س7ل Год назад

شرح رائع 👍

@sardarsatish4558 4 года назад

Hey Julio! Can you explain about mosfet as switch

@Chidu_u 4 года назад

Can you please make a video on Vector Curls?

@drpkmath12345 4 года назад

Any plan to cover math materials again?

@successthruknowledge 2 месяца назад

It was a good example; although I don't think that he said what 'BJT' acronym means!!! Also, I'm hazy about why you would want to invert a circuit.

@fayaazabdoola7676 4 года назад

Do calc 3!!

@SureshKumar-nk2ok 3 года назад

thank u sir , in LED ex it requires 20 miliamps but how 2.16mA sufficient

@anmolpardeshi3138 4 года назад

So can we say that the circuit for BJT as Switch and BJT as Inverter is the same? Just that while its considered as inverter we record the Vce voltage but when we see it as a switch we just see the LED output? But what will we really achieve by looking at an LED state? Pls help me spot the exact difference between the two applicantions with respect to the circuit and how & where the output is measured

@hoppingspr5149 4 года назад

Is there anyway you can make videos on special relativity?

@rachelguevarra 4 года назад

What application do you use in your math tutoring like this one?

@fahadkhan8464 3 года назад

How do we determine the value of Bdc (current gain) of a transistor, like if we use bc547 transistor ,, what ll be its current gain??

@cosmosben6726 2 месяца назад

Why when the ratio of R1 and R2 small, the BJT will be in saturation mode?

@dcroderick 3 года назад

I don't understand how the current is getting through R1 to the base of the transistor with the switch being open. Is it somehow backfeeding through the other battery through the collector?

@reverser41 11 месяцев назад

you can not confirm 2.2v drop at the led, the calculation could be 2.2 but you have to take resistance of the led into account to find out how much voltage drop across the resistor since we know the current flowing that path.

@masaratbazaz7576 4 года назад

Which software do u use to write

@aerohk 3 года назад

Great video! But what does BJT has to do with OChem?

@TheNotTheKingKing 4 года назад

what does this man not know

@gerrys6265 3 года назад

I love your videos....perhaps II need "electronics for dummies", but why not just turn on the LED with a normal switch rather than going through the transistor? Is it not just an extra unnecessary part?

@mrbushpilot 3 года назад

Basically thinking that myself. I think this is just one simple example. Might be used kind of like a relay when you don't want a large current or voltage through the switch being used, but some more usage examples would be good.

@davidb2438 Год назад

How about if you wanted to switch it 1000 times per second, can’t do that with a normal switch, that answers your why

@gerrys6265 Год назад

@@davidb2438 Admittedly that would change the situation considerably....

@misstan350 4 года назад

It's good if he has not put his face in the video, it would distract me from learning. I can maximise my learning by avoiding distractions. He had made right decision in not showing his face. If were a teacher, I would do the same. It is very easy to pull faces and gather crowding on youtube. However, it is very hard to sustain the attention of the audience when there is no face but just a magic black board with a convincing voice. Hello !!! from a teacher in London. Yes, I am still a learner.

@marcellinuschibuike4065 2 года назад

Hw did u get that 0.6v across the base

@sympatique2 3 года назад

What are you using for write and draw on your video.? Thank...

@markfinn825 Год назад

I am looking at 7.68 volts as the sum beyond Voltage D. Why?

@bee.18 4 года назад

Hi guy, which software are u using?

@saki7952 4 года назад

Nowdays you only give lessons to the high level students. You forget us tutor.

@rawbits 3 года назад

Now, how to calculate these things in for example an AND gate. Like the currents at the base of both transistors are 3,6 mA with 1k resistors and 4,4V Vcc (coming from an Arduinos +5V line). But the current at the LED is only 2 mA. That means negative amplification. WTF?

@abeditani8293 4 года назад

Is there a transistor the IC = 20A for real ?

@markfinn825 Год назад

3.84 plus 2.2 plus 1.64 equals 7.68 . But the voltage is only 6 volts. What went wrong? Was it my arithmetic? OR something else?

@Thomaskenneth00 7 месяцев назад

Isn't BETA calculated by Ic/Ib, thus BETA in your inverter example is actually B = .1 and not B = 10? Obviously meaning the same result that Vce is (near) Zero, but just wanted confirmation on this. Thanks!

@Thomaskenneth00 7 месяцев назад

You know what, nevermind! I was ratioing the Resisance values before, not the currents. Apologies!

@ajay-dp2si 8 месяцев назад

Please tell me why base current is not considered in bjt as switch we shoe base terminal as open terminal why

@thanaung8407 Год назад

🖤🖤🖤

@kletops46 4 года назад

What happened to 'Gain' rather than 'Beta' ?

@nuk3man Год назад

Why does the Vce approach 0 when the circuit is fully closed in the second scenario while in the first scenario the Vce is approx. 1.64 V?

@muhiddenmisbak1013 Год назад

The ratio of the base resistor and collector resistor is staggering

@nuk3man Год назад

@@muhiddenmisbak1013 Not sure I understand what that means. Can you elaborate?

@muhiddenmisbak1013 Год назад

@@nuk3man you see, when you want a "ON" state transistor, you want your VCE to be zero thus having it on saturation state. In the second scenario, you want your transistor to work as an amplifier, thus not wanting it to be closely or equal to zero for Vce , sor Vce=1.64V

@jaikrish50 3 года назад

May I know the name of the software that u use ,it seems like black board

@ckimsey77 10 месяцев назад

1st ex of switching an led...what's the point? If uve a resistor to limit the c uhhh rrent to the led so IRS not overloaded anyway, why the extra complication of the transistor? Controlling larger I with a smaller I makes sense if it's a large current that would spark dmg a physical switch...but when were talkin mA to begin with...again what's the point rather than just switching the led directly??

@lankytv3990 4 года назад

But how do u use this black background Please let me know I want use it So please teach me how 2 use it

@shawnpauldeleon5100 2 года назад

5:00

@chandrusanthosh8581 Год назад

Can anyone help me How does he find Vbe = 0.6

@j5892000 2 года назад

Why not just use S1 and remove the bjt and the resistor going to the gate of the bjt

@test011 3 года назад

😍

@dnyanrajtelang210 4 года назад

sir you are doing great job but your voice is monotonic , for better understanding please could you change it ?

@kaitlynpassegon1877 18 дней назад

Gonzalez Laura Gonzalez Angela Miller Larry

@abdalaehab8178 4 года назад

The fourth

@primitivetuitionbynkcsir369 4 года назад

⭐⭐⭐👌

@alchemy1 3 года назад

What is up with everybody just throwing in an LED in the circuit and say nothing why, I mean habitually and simply move on with no explanation. Second of all which seems so obvious, that on one hand it is preached that larger current is to flow through the collector and on the other hand putting a resistor to stop larger current, aside from the fact that without it it will burn the LED. It is always a circus. There is always some crap is thrown in all types of settings and walk off and no one will interrupt the nonsense. They just eat it up and shut up. So you got - and + on the voltage supply of 6VDC. Then at the emmiter of the transistor you got it hooked up to the - and also ground. What is that suppose to mean? Obviouisly there are three things.... (-,+,ground) Where does the ground go? Under my foot?