BJT Transistors - Electronics Switches and Inverters

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:

Night Activated LDR Sensor Circuit:

Finding The DC Load Line & Q-Point:

Voltage Divider Bias Circuit:

Collector Feedback Bias Circuit:

__________________________________
Emitter Feedback Bias Circuit:

Common Emitter Amplifier:

Common Collector & Base Amplifier:

Darlington Pair & Beta Current Gain:

Class A, AB, B, & C Amplifier Circuits:

Voltage Gain of Transistor Amplifier:

_________________________________
Multistage Transistor Amplifier Circuit:

Transistor Audio Mixer Circuit:

Operational Amplifiers:

Summing Amplifiers:

LM386 Audio Amplifier:

LC Oscillator Tank Circuit:

_______________________________
Final Exams and Video Playlists:

Full-Length Videos and Worksheets:

[tylerherman]

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.

[majo_vega__]

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

[beyourbest]

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

[pixelberrychoicespodcast]

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,

[itsyaboybinnybenis]

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!

[jayachandra]

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

[abbeyzondo]

Your videos are addictive. Thanks for sharing your knowledge.

[Felix-qz]

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

[charlesrippert]

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

[angelamawia]

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

[kabandajamir]

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

[loltwest]

Weird how I feel nostalgic for this content.

[JT-qcih]

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

[solomonglenda]

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

[lemuellongatang]

Thanks sir for a clear explanation… God bless

[blessedtembo]

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

[jakep]

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.

[randomguy]

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

[samogo]

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

[meekdenzo]

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