Classic Circuits you should know: transistor inverter

Classic Circuits you should know: transistor inverter
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[@captainpugwash4100]

Classic Circuits are always worth watching and trying out at home! 🧪

[@gartmorn]

Great to see the basics being rolled out as, like I have said before, there are always people starting out who need this kind of information and it also does no harm for the slightly more experienced hobbyist to keep there memory refreshed! Great stuff Paul!

[@utkf16]

Im one of the newbies finding this really useful. I make one up each day, I add some extra searching around for more explanations then play around with them by joining them up with the other basic circuits. Early days for me but its fun and keeps me out of trouble!

[@dejakju]

Indeed, great explanation.🖖

[@willyrivero470]

I love these videos. Many people do not realize how many things are not clear in their minds yet. But they still work for years with these uncertainties in their heads. Thanks for taking care of this. Big thumbs up!

[@TheTrueVoiceOfReason]

1 more resistor and you can get both inverted and non-inverted from this basic setup. When you get the basics down, the only limit is your imagination. Thank you, Paul, for helping to inspire people to greater heights.

[@robertchaparro7225]

Would you mind explaining where this resistor would go?

[@TheTrueVoiceOfReason]

@@robertchaparro7225 Sure. Another resistor between the emitter pin and ground (instead if straight through) and tap the non-inverting output at the junction of the the emitter and resistor, basically a mirror of the upper/inverting output. If you google electronics-tutorials and phase-splitter, you'll see exactly what I'm describing.

[@robertchaparro7225]

@@TheTrueVoiceOfReason thanks for replying I’d like to get better with circuits and it really helps being in the comments lol

[@ozzymandius666]

You are literally making the world a better place, one video at a time. It is folk like you who have given me the confidence to get into board-level repair of phones, stereos, TVs and computers. Thanks.

[@Jay-fp8iy]

Thank you for the video. Please do more of these 'circuits you should know' videos as I don't know much about anything.

[@pulesjet]

One more Building Block to Infinity. Good Stuff Sir. Add one more Resistor and LED and you have a functional Logic Probe.

[@jsmythib]

When you dont have a 7404..But you do have a giant bag of transistors and a box full of resistors! :) Currently working on a Ben Eater inspired sap1. Thankyou for an excellent 'Hello World' inverter.

[@michaelkeithduncan]

Needed this for my project to indicate a sleep mode being active, thank you for posting and explaining

[@FreelancerFreak]

I'm a EMT trainee I know the effects of congestive heart failure, I'm sorry you're suffering the effects of that 😞 I hope you're doing okay

[@dmeemd7787]

Man, me too! :-/

[@MrRobertBassett89]

love these videos. I'm currently in college as an electrical engineering technician, so we've learnt all these basics so far, but to anyone new or anyone that wants a refresher then these are great. Full of information and not entirely scripted. Love it Keep up the great videos!

[@gullinbursti]

This is just what I needed. Got some relays for an arduino project and didn't realize they are active low.

[@Erudotic]

Can't get enough of these CCYSN! With Each new one your teachings are increasing my gut-feeling understanding of electronics and circuit-reading skills so much. I love you man, thank you so very much. I Just got back in the game aftrr leaving it 30 odd years ago early 20’s, so happy with your sharing your 'old-schoool' knowledge, a GREAT help in my new, mainly 'old-schoool' project (building a modular synth to own design, scavenging the net and nu old books, plus some remains of the one I built age 16-20.

[@BryanByTheSea]

Love these Classic circuit videos. Thanks for taking the time to produce these.

[@stefanpejak9131]

Every other youtuber i watch just told the name of components and pulled out resistors and neaver eplained how actually to make one ourselves. Thank you.

[@michaelpadovani9566]

Thanks for the demo (and showing the amp measurements was a nice touch). Easy to implement in many projects.

[@johncgibson4720]

I have one of the most popular remote control hobby transmitter called frsky qx7 . And it has a inverter problem that prevents higher speed serial peripheral RF circuit. And this episode explains why the high speed RF vendor gives us a transistor to fix the problem. Nice episode.

[@mtkoslowski]

Very good classic circuit Paul. Thank you. Keep ‘em coming.

[@MrLaxr-op4be]

I'm watching your video just because of the title. I'm trying to study the inverter circuit, I'm talking about DC -> AC Inverter. Not the power ones but a simpler one to get the head around. Can you please make a video on that? Your content has been so beneficial for me.

[@randywatson8347]

Excellent it's just what I needed. When the gate has a load, it should prevent the current going to the ground.

[@adailyllama4786]

Thank you! I need the basics and these videos are very helpful.

[@vokanam]

Best and simplest explanation in the world, as for me. Thanks!

[@philippeschjelderup9644]

Your videos are as always useful, Paul! The classic series are by far my favorite. Btw: In our previous chat related to Mosfet transistors I have discovered the ULN2803 which makes my life a lot easier, especially if you have a lot of power hungry devices where you would like to turn of and on devices by need. 500mA per output is super cool and in series you can power a lot of fun stuff. Maybe make a video of it? :)

[@ae1tpa92gwtom2]

Thx, going bk to basics, nice. Was expecting an oscillating input and seeing the input n output on the scope. But this gets into amplifier territory, Anyway always a pleasure, cheers.

[@ehvway]

You always explain things very good. Thank you sir. God bless you

[@paulramasco6769]

Very awesome, I have a few designs that this can go into for safety and situational awareness reasons. Thank you.

[@prov_s195]

Thanks! Beatifull example and explanation

[@Electronzap]

I really like how you use pin headers to clip the power supply to the rails. Much better that what I have been doing :) .

[@zedlepplin9450]

Keep this coming man....one of the best out here

[@johnf3326]

You are my teacher of choice!

[@benschork9449]

I didn't uderstand the schematic at all, and reading it made the circuit not work. I still got a lot from this video. Thanks

[@grontti]

Great videos. Thanks for sharing!

[@doubleHLabs]

Just what I needed. Thanks

[@JoeMcLutz]

Thank you and Happy Thanksgiving.

[@kolinevans9127]

Thanks for sharing. Useful info

[@paulevans4334]

New to your channel and I really like these circuits you shoul know episodes

[@Ubetsuforever]

Dude this helped me so much!

[@soshimo]

This is the 2020 version of Forest Mims :). I grew up going to the 'Shack and looking for those Forest Mims books.

[@MalagasOnFire]

TTL => Transistor Transistor Logic , in this case the first stage of the array.

[@kumaravelrajan]

Great video, thanks

[@keithking1985]

I love these videos 😊

[@mikeoliver3254]

Great video Paul, I love me some classic circuits. I had an idea that you might want to use. How about taking us through building several classic circuits and the showing us how to connect the together to get a desired result. Just a thought I had rattling around in my head while sitting here board in the hospital again. Have a great week and thanks for all you do.

[@utkf16]

Brilliant idea Mike

[@AThreeDogNight]

Nice neat little circuit.

[@MCsCreations]

Really, really interesting, dude!!! 😃 On the "rc world" we have the SBUS protocol for FrSky (that is the manufacturer of the most used radios and receivers - or at least was, but that's a long story). And it's signal is inverted (in relation to other protocols)... So, some flight controller boards (the F4s) need a inverter like that in one UART. 😊 F3s and F7s have it in software or something like that. 😊

[@mrj.o4556]

I used this circuit as well as a simple timer circuit to create a circuit with two LEDs and a button normally one LED is on then when you press the button one LED turns off and the second one turns on for a short while

[@Soupie62]

Also good for level shifting. If you have a 5V Arduino style product, but someone gives you an FPGA board (Arduino header pins but 3.3V logic component), a level shifter will prevent you destroying something.

[@ThePaulbilek]

Great video in a 'lab' setting. Do the same with your input signal as a voltage supply to your transistor collector. - Paul

[@ThePaulbilek]

Here's what I came up with content://com.android.chrome.FileProvider/images/screenshot/16676119168503345115797850563596.jpg

[@johnmarks714]

Good work. I hate how books assume you know about the common ground. Much clearer how this works.

[@firstlast8252]

I really like this video and circuit. I hooked up the base to my blink sketch on my Arduino to control the signal. when its off the red led is high and when it blinks the green led turns high shutting off the red one. I'm having a lot of fun making your simple circuits. Also I found your wish list from amazon so I'm sending you two gifts. I hope you like them. One of them is from my sense of humor I hope you understand it. anyway enjoy Are you still with me.... I love that David Harvey

[@nathanas64]

There’s only one regret I have when I watch these videos. I wished I studied electrical engineering in college. But thanks to presentations like this I get an education without final exams !

[@user-be4yc2vr5c]

Can you show some RL examples of it in action or what it'd be used for? Thanks as always!

[@RespawnRestricted]

good vid as always

[@westerngodzilla]

Nice video!

[@BharatMohanty]

1000th like 👍🏼 thankyou very well explained....

[@KissAnalog]

Excellent video Paul!

[@learnelectronics]

Did you get the PS?

[@KissAnalog]

learnelectronics Yes I did - thank you! I posted a public thank you to Learnelectronics;) I’ll post a video very soon.

[@keithking1985]

would be perfect as a standby/Power on light in a project!! have a red LED when it's off and a green LED on the emitter side for when its on!!!! like a TV for example..

[@goodwill7643]

would be nice to see sine wave on scope. Input and output.

[@petertyrrell6690]

On this circuit there would be no sine wave output. The output (LED) is either on or off or high or low.

[@goodwill7643]

​@@petertyrrell6690 Thats true. I was wondering if it possible to use instead of opAmp for negative voltage convertion. For example ADC pin on MCU takes results for Voltmeter, but it must be always posetive. So as long we have negative voltage it would be nice to know if we cold convert it only with one Transistor or we still need opAmp for that.

[@petertyrrell6690]

@@goodwill7643 One could likely re-configure the circuit to do many things but then it would not be a simple not gate any more.

[@Kiever_Sloane]

Just found this series and love it. I'm playing along on tinker cad, Is the input supposed to connect to ground or to the positive voltage? your diagram looks like ground but I'm not getting to to work unless I do positive. Also I think your circuit is set up this way.

[@murrrr8288]

Great that I accidentally bought hundred 2N2222 transistors because you're using them in everything so I can test these myself :D

[@htpcandroid4903]

One thing I don’t understand though! In Forest Mims book “Getting started in electronics”, page 92, it shows a combined buffer, inverter transistor circuit, where 2 LEDs are connected between ground / Emitter for LED1 and ground / Collector for LED2. In case of Low input, LED 1 will be off and LED 2 will glow. That is perfectly understandable, however when the input is high, the transistor is switched on and, in my understanding, I expect both LED to be lit as they become kind of two LEDs in parallel after a 1K resistor. Why only LED2 is on? Thanks.

[@michatroschka]

thanks for the detailed video! its very relaxing to watch! i just measured the current draw of the whole gate and its around 0.67 mA if it has a HIGH input. is that normal, and could i reduce it? if the input is LOW, the current draw is 0A. its for a battery project. i need a LOW signal if the cell gets sun , thus the inverter and it works but 0.67 mA is too much, maybe an op amp buffer behind it? thanks!!

[@philosophyversuslogic]

Much thanks for the video. What if to the output we add R3 such that Impedance of the transistor is much higher, than R3 (R3

[@KAOPro]

Thank u

[@Steve-dr8rw]

Why does the base resistor need to be increased as well as the collector resistor?

[@819jt]

These videos have been key to implementing these doohickeys in real life. The hardest part for me has been to relate the spec sheet for the transistor to calculate what I need to control it. If you can suggest where to go for that, I'm on it, but I think implementing more of the planning for a circuit, selecting the V, I, R for the specific transistor from the data pulled from its spec sheet would complete the puzzle. I'm a noob, so, I don't know how you got to choose this transistor, how you came to choose the resistor, how you knew which power settings... yep, all of that. :)

[@learnelectronics]

That's too much for an answer in the comments. I will make a video on biasing transistors.

[@vahagnmelikyan2906]

How do I make it for 10-20amp output giving 2-5dc volts input?

[@sokoloft3]

Was trying to set this up with a transistor I pulled out of some scrap electronics. However I couldn't get it to work. I think they're the hitachi D468. Says its npn. Maybe something to do with the voltages. I think I see why. My pins are E, C, B

[@MrBobWareham]

Loved the video like my dad used to say keep it simple stupid KISS

[@kingjames-fn8ib]

This reminds me of a logic OR gate.

[@ngobishamudin5461]

Hello does any npn transistor work on invertors

[@jimmyneutron8702]

Mustvthe transistor be a BJT? Can it be a MOSFET?

[@piercescoggin7297]

Why do you need such high resistance for transistors?

[@Motion_0112]

i dont understund why it works with a transistor but it doesn't i you conect a switch directly

[@ricardoacostatorres1350]

Is this the equivalent of an NOT Logic Gate? Beautiful video!

[@learnelectronics]

Yes

[@davidluther3408]

EASY BUILD AT HOME,GOOD DEMONSTRATION.WOULD YOU BUILD EACH LOGIC GATE IN AS DISCRETE CIRCUITS ,SUCH AS AND,OR,NAND,NOR,XOR,XNOR?

[@learnelectronics]

I have done them already

[@davidluther3408]

THERE ARE OTHER GATES THAT YOU DID NOT DO SUCH AS AND,OR,XOR,XNOR.

[@740Racing]

Would the output be 5v?

[@weerobot]

Cool...

[@nid274]

Great simple circuit. Would you mind making a lead acid battery over discharge cut off curcuit like this one - absolute minimum components and minimum current consumption?

[@himalayanH1]

Your VOICE sounds like 😄 CRISS HEMSWORTH ⚡🔨

[@learnelectronics]

unfortunatly I more resemble Danny Divito

[@jrareas]

Thanks for this. I put this circuit together in everycircuit everycircuit.com/circuit/4749471395872768 and we can easily see what you explained here. I will be working on other basic circuits and I will use your videos to help with them. Thanks again

[@ramuch7539]

why your voice is very low valume even i increased maximum valume in my pc

[@CasaMaryParadise]

What = YES How = YES Why =???