BJT Transistors - Electronics Switches and Inverters
ฝัง
- เผยแพร่เมื่อ 19 เม.ย. 2020
- 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...
__________________________________
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...
_______________________________
Final Exams and Video Playlists:
www.video-tutor.net/
Full-Length Videos and Worksheets:
/ collections
Final Exams and Video Playlists: www.video-tutor.net/
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.
Take Care of your health, you are a great tutor.
Facts
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. ❤️
The best explanation I've ever seen in my life. Thank you!
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
how are you doing civil engineering and watching videos on transistors?
@@K-TRIX maybe first year is general
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!
great teaching i like all your lessons ....your explanations make complex problems appear so easy ,thank a lot sir. A big salute.
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,
Brilliant! Perfect! Never got it expained like this; but only now I understand! God bless you!!! Many many thanks!
I always wanted to meet a Teacher like you, so to answer my questions.
The world's best teacher ever may God reward you all my success is attributed to your good explanation
I just want to thank you for helping me.
Thanks sir for a clear explanation… God bless
Thank you so much for this! Will be doing any videos on MOSFETs?
I wish he made videos on TTL ECL circuits with problems included it would help so much right now for digital electronics
Yes. Need ttl videos!
Thank you so much! It helped me a lot
Weird how I feel nostalgic for this content.
God blessed u are.. amazing explanation
thanks ever so much man .. love all your vids ..
Video for MOSFETs please. You are awesome!
incredible....Salute
Very well done , very well
Hello Julio! Do you think you could do some videos on Double Integrals with Polar Coordinates ?
thank you for this video. Can do a video on operational amplifiers before may please. It would be a big help thank you
Thank you so much dude😩 I’ll pass my exams well because of you.
How did your exams go?
Thank you very much
Can you make a video for FET please. I learned a lot from you videos
Many many thanks
You are great!
BJT? More like "Big information, for free!" Thanks for all of these wonderful, free videos.
Hey you should make videos going over mosfet problems like NMOS and PMOS
Nice video💯✌
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.
I think that should work.
Have a nice day sire ..
thank you!
What application do you use in your math tutoring like this one?
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.
The ß is clear now, it can be 100% or 0, thank you!
Hey Julio! Can you explain about mosfet as switch
Good lecture sir teach about IIT topic India entrance exam
What are you using for write and draw on your video.? Thank...
Can you please make a video on Vector Curls?
The besttttt!!!!
Bravo 👏
Hi guy, which software are u using?
Any plan to cover math materials again?
God bless you
U are such a great tutor. Would like to see your real face someday do post a video showing your face ....
His name is Julio Gonzalez. Look it up on google. There’s only one pic tho
please make some videos on FET mosfet dia traic
Is there anyway you can make videos on special relativity?
Which software do u use to write
شرح رائع 👍
thx
Hello sir can u do a video on MOSFET?
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??
This dude’s channel is what we thought khan academy was 🙌🏽
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 TH-camr 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.
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?
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
Hello. Can you explain how the 6v becomes 0.6v at the base voltage
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.
Hw did u get that 0.6v across the base
thank u sir , in LED ex it requires 20 miliamps but how 2.16mA sufficient
Please tell me why base current is not considered in bjt as switch we shoe base terminal as open terminal why
How did you get the 0.6v? pls show me the formula. thks.
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.
May I know the name of the software that u use ,it seems like black board
Great video! But what does BJT has to do with OChem?
Do calc 3!!
But how do u use this black background
Please let me know I want use it
So please teach me how 2 use it
Is there a transistor the IC = 20A for real ?
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.
"PLease JUST tell us a pic of ur face"
His name is Julio Gonzales, look him up. You're welcome :)
I am looking at 7.68 volts as the sum beyond Voltage D. Why?
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?
@ 8:43 It's a difference in potentials, not in potential differences.
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!
You know what, nevermind! I was ratioing the Resisance values before, not the currents. Apologies!
What happened to 'Gain' rather than 'Beta' ?
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.
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?
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.
How about if you wanted to switch it 1000 times per second, can’t do that with a normal switch, that answers your why
@@davidb2438 Admittedly that would change the situation considerably....
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??
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?
The ratio of the base resistor and collector resistor is staggering
@@muhiddenmisbak1013 Not sure I understand what that means. Can you elaborate?
@@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
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?
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.
Nowdays you only give lessons to the high level students. You forget us tutor.
Why not just use S1 and remove the bjt and the resistor going to the gate of the bjt
what does this man not know
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??
Can anyone help me
How does he find Vbe = 0.6
sir you are doing great job but your voice is monotonic , for better understanding please could you change it ?
🖤🖤🖤
😍
5:00
⭐⭐⭐👌
ビジネス日本語能力テスト BJT 初級 第1課~第12課 | Business Japanese Proficiency Test BJT
th-cam.com/video/KhQGICayjFQ/w-d-xo.html
The fourth
bro what is your name ...plez🙂🙂🙃
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?
Ek like thok do....hai commerce ke dekh ye rahe hai😁😂😅
Guys a very important thing....
I am a friend of THE ORGANIC CHEMISTRY TUTOR for about 12 years
If someone need a photograph of him please contact me...
Thank you
meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
@@BrToThe8ThLive what????
Pothu thevidiya payalae
do a face reveal
where the actual hell did you get 0.6V for the base-emitter voltage....no calculation...no explanation...you pulled it out of thin air