Testing circuits I found on the Internet: Inverter! It does work, BUT...

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In this episode of "Testing circuits I found on the Internet", I will be having a look at a popular inverter schematic I found on google images. The design uses an astable multivibrator in order to pull current alternately through a transformer and thus create a high AC voltage on its output side. A lot of DIY inverters use this functional principle. That is why I will build up the schematic, properly test the circuit and show you what problems it comes with that you can more or less easily fix. Let's get started!
Thanks to Brilliant.org for sponsoring this video.
Music:
2011 Lookalike by Bartlebeats
0:00 The schematic I found on the internet
1:06 Intro
2:09 Building up the circuit
3:13 Initial test
4:23 How the circuit works
7:32 Problem 1: Feedback
8:45 Problem 2: Overvoltage at the MOSFETs
9:20 Problem 3: Overvoltage at the Transformer
10:11 Other problems (lots of them)
10:42 Verdict

Пікірлер: 924

@adityashukla7849 3 жыл бұрын

We want a "Random circuit I found on Internet" series. 🙌

@greatscottlab 3 жыл бұрын

If viewers ask for it and the video performs well then there will be more ;-)

@BobBeatski71 3 жыл бұрын

I'm particularly fond of DiodesGoneWild when he dismantles cheap Chinese made chargers and shows their poor construction.

@firefox1136 3 жыл бұрын

Yes please. You could look at plasma speaker circuits, with a 555 timer. You could test if those work better tham yours. Or you could look at some fm/ am shortwave radio transmitters. You could compare transmitters with a LC circuit or a cristal osccilator. Thanks for the vid, it whas great!

@filipw8073 3 жыл бұрын

@@greatscottlab can you test a popular FM radio transmitter circuit on 1 or 2 transistors? (or receiver there are a lot of shemes for them) i built like 3 of them and none is working, and i don't know that do i do som ething wrong or is it just scheme bad

@randomguy-dg1vb 3 жыл бұрын

@@greatscottlab wondering could you make a portable electric guitar amplifier with input voltage of around 11.1 volts m I have several li-on batteries

@karsanuma 3 жыл бұрын

This new series is something I would definitely watch. As people will miss out a lot of things whenever they see a circuit on the internet.

@zarifzaman8959 3 жыл бұрын

@karthick Exactly my point

@JADES-GS-z13-0 3 жыл бұрын

That's why trust oscilloscope not the circuit description of those project circuit.

@nistakmahmud 3 жыл бұрын

We need more episode....

@RaduTek 3 жыл бұрын

4:52 That complete silence made the moment so good.

@williammathew8395 3 жыл бұрын

He could have added a cricket 🦗 sound to make it more dramatic 😂

@chrismayer8990 3 жыл бұрын

I needed the silence. I had to concentrate on the perfect waveform! :-D

@Thats_Mr_Random_Person_to_you 3 жыл бұрын

I burst out laughing!!

@jurgmanx4644 3 жыл бұрын

I knew it was gonna be square, err, squarish? By Tesla forget that.

@aeleequis 3 жыл бұрын

"let's see that sinewave..." That part made laugh too hard I nearly choked

@Gastell0 3 жыл бұрын

As terrible I am at math, even I know how the sin wave looks like

@greatscottlab 3 жыл бұрын

Sometimes I can be funny.......but not often....back to work!!!!!

@postualin6551 3 жыл бұрын

@@greatscottlab 🤣🤣🤣😂😂👌

@stevenanderson9532 3 жыл бұрын

I busted out on the silence after he saw it too, then scribbles...

@angryman9333 Жыл бұрын

@@greatscottlab hahahaha

@paradox3875 3 жыл бұрын

The Title of your new format already gave me the chills..

@greatscottlab 3 жыл бұрын

Awesome.....that is the point ;-)

@Ilikeridin 3 жыл бұрын

Reminded me of an old Tarantino film. In a good way.

@Asu01 3 жыл бұрын

Me: _"Mum, can we have a real sinusoidal waveform?"_ Mum: _"We have sinusoidal waveform at home"_ *Sinusoidal waveform at home: **5:00*

@sqbronco1 3 жыл бұрын

that is totaly like my mom

@Arctic_silverstreak 3 жыл бұрын

Lol ikr

@calebp 3 жыл бұрын

haha

@dsnein 3 жыл бұрын

Lmao

@johndavid360 3 жыл бұрын

Lol

@xzerr 3 жыл бұрын

Building a random device from the internet - sounds like a great topic for videos, hope this will ignite and not burn )

@joshnabours9102 3 жыл бұрын

It is ok if it burns as long as you have your anti-explosive pie tin.

@Optimuseq 3 жыл бұрын

Maybe you can do the whole series of testing random internet circuits?

@greatscottlab 3 жыл бұрын

That is what I had in mind. Of course only if viewers want that and the video performs well

@vladd9344 3 жыл бұрын

@@greatscottlab I want it!

@ianhayden2839 3 жыл бұрын

@@greatscottlab I want it!

@unperrier5998 3 жыл бұрын

@@greatscottlab and please do include circuits that do work safely. Because the outcome of this video is that nobody watching will build it! This video is kind of BigClive video: not for building things but for understanding... but I guess it depends on your goals, whether you want to imitate BigClive or provide circruits that viewers can reproduce.

@moonmatthew 3 жыл бұрын

@@greatscottlab Make it please

@mo938 3 жыл бұрын

"but you're not reasonable, and want to save money" lmao i love this guy

@ToniPlays_ 3 жыл бұрын

I have watched the video halfway, this is gonna be a good one. We need more of these.

@greatscottlab 3 жыл бұрын

Thanks mate :-)

@dennisbengel11 3 жыл бұрын

Now we need a circuit of an inverter that does work and creates a perfect sinusodial waveform! :)

@RAM_e-Solutions 3 жыл бұрын

I really appreciate this kind of video where you test circuit from internet. Maybe you can also do some circuits from forums!

@greatscottlab 3 жыл бұрын

I will see what I can do :-)

@proxyhx2075 3 жыл бұрын

Finally a new video, our beloved Great Scott has returned!

@greatscottlab 3 жыл бұрын

More to come!

@ryanf1478 3 жыл бұрын

Absolutely love the idea of this video series!

@greatscottlab 3 жыл бұрын

Glad you enjoy it! More to come hopefully

@aeleequis 3 жыл бұрын

This video series could be great. We could learn a lot from these

@Xsses 3 жыл бұрын

5:00 That silence is great, I love that moment. Perfect execution.

@stopPlannedObsolescence 3 жыл бұрын

deception face time xdd

@Eagle-md6ku 3 жыл бұрын

Same!

@69iqtutorial 3 жыл бұрын

I would love to see more videos on this series 🙂 especially some of those simple circuits found on internet such as descrete opamps etc...

@greatscottlab 3 жыл бұрын

More to come! Hopefully.....

@cezarcatalin1406 3 жыл бұрын

There are always 3 obligatory steps when designing new circuits: - simulate them - build them - measure them in real life

@kapytanhook 3 жыл бұрын

What is a good simulator to find that simulates in a lifelike manner? Have a lot ot issues when i mix high power with sensitive stuff like micro's and analog

@galfisk 3 жыл бұрын

1. Build 2. Test 3. Deal with unforeseen consequences 4. Find out what went wrong (or grab a crowbar and fight aliens)

@jurgenkriebs9405 3 жыл бұрын

I used ltspiece in uni no idear if it any good for your use case

@eDoc2020 3 жыл бұрын

Don't forget to understand how the different elements in your circuit work and how they interact. This is probably the most important thing if designing your own instead of building an already-designed circuit. For instance, you can connect an LED to a battery and have it light, but if you don't understand the IV curve of LEDs your circuit will be very unreliable.

@tornadokat 3 жыл бұрын

The Internet would not be complete without people like you that point out designs that don't perform as promised.

@amaankhan3762 3 жыл бұрын

We Want more episodes of this series. I learned allot from today's video. I used to think it the output is 240v then everything is good, but today I got to know so many things.

@dabig_guy2204 3 жыл бұрын

keep the videos coming. thank you.

@greatscottlab 3 жыл бұрын

Will do!

@sahasananth987 3 жыл бұрын

Do more "Testing circuits I found on the internet" this was really fun. Also can you ike me to the pens that you use?

@greatscottlab 3 жыл бұрын

Stabilo Point 88

@sahasananth987 3 жыл бұрын

@@greatscottlab Thank you so much Love from India. Keep up the amazing work.

@meowcula 2 жыл бұрын

This sort of format is especially educational. Every hobbyist looks for schematics online and pointing out the little traps and gotchas is extremely important.

@motosk8er2 3 жыл бұрын

Please do this as a series! I've learned everything I know about designing and building electronic circuits from the internet, and as a result have learned the hard way that there's a lot more to building a functional device then just a shoddy circuit diagram from Google!

@BloodAsp 3 жыл бұрын

You should try some of those FM or AM circuits that they have!

@ChristieNel 3 жыл бұрын

I would like to see you have a go at one of those designs that modulates high frequency PWM into a sinusoid.

@gregthatcher919 3 жыл бұрын

I love love love this series, it's really inclusive with your audience.

@joshuacollins385 3 жыл бұрын

More of these please and thank you.

@BensWorkshop 3 жыл бұрын

I don't know as much about electronics as you do, but when we both read "astable multi vibrator produces a near sinusoidal waveform" I must admit I laughed.

@ColinTimmins 3 жыл бұрын

"What could go wrong?" **Boss music intensifies**

@coler154 3 жыл бұрын

I love this new series, Please do more!

@Graham-ce2yk 3 жыл бұрын

Good job, this series is definitely something that is needed.

@starsistor 3 жыл бұрын

Very interesting, could you check some projects related to "Arduino MPPT solar charge controller"

@DigBipper188 3 жыл бұрын

You should try out one of the 12v fluorescent lamp driver schematics that's floating around on the interwebs... there are a few different variants, with and without cathode heating, and it'd be interesting to see how they compare.

@uK8cvPAq 3 жыл бұрын

The ones which apply a waveform with a DC component blacken one end of the tube quicker and reduce lifespan. The cathode heating helps with starting I think.

@garyhalsey7693 3 жыл бұрын

Loving the idea of testing circuits from the internet!! Looking forward to a few more of these!! Great video, as always!!!

@kumin0312 3 жыл бұрын

Love this new series...

@alexandervohringer5086 3 жыл бұрын

I'd love to see active noise cancelling or reducing headphones as a new project! greetings from Germany :D

@greatscottlab 3 жыл бұрын

I can put it on my to do list

@alexandervohringer5086 3 жыл бұрын

@@greatscottlab :) 👌🏼 Your videos are very well structured and are giving a well understandable look inside new topics. Continue like that!

@Kevin-jz9bg 3 жыл бұрын

3:58 GreatScott: "Mishandling of such a high voltage can lead to fatal injuries" Electroboom:

@tothemaxx1991 3 жыл бұрын

ALL THE VOLTAGE ALL AT ONCE what happened to him by the way?

@gani2528 3 жыл бұрын

Keep this series going, Scott, really informative. Thanks.

@Vivekstark68 3 жыл бұрын

I loved this type. Please continue doing this type of video series.

@grugbug6116 3 жыл бұрын

Please do video with sg3525

@Robyrob7771 2 жыл бұрын

Nice to know. Always test new circuits.

@jacobjockey 3 жыл бұрын

please keeping this series up we need it

@burnttoast5407 3 жыл бұрын

I love the idea of a series of this type of video

@PatnaikUC 3 жыл бұрын

Excellent analysis. Thanks a lot

@noelj62 3 жыл бұрын

Very interesting series. Thank you Scott.

@MrKristian252 3 жыл бұрын

I hope this becomes a series, this was a fun video to watch. Would be nice if you can show comparison schematic before and after fixing the "issues"

@martinlucero9594 3 жыл бұрын

Excelent Dear Scott....!!! really amazing...!!! Congrats from Argentina!!! a Really fan from all what you produce on your channel!! DO NOT STOP!!!!

@atom2319 3 жыл бұрын

Great series you have started to test online circuits... Enjoyed it... Hope for more ..

@taylorlindley5578 3 жыл бұрын

This definitely needs to be a series!!!

@tanmay______ 3 жыл бұрын

This series is going to be fun!

@adosaro 3 жыл бұрын

Watching again to show support for the concept (but also good circuits)

@mushroomsamba 2 жыл бұрын

thank you so much for all the super informative content that you upload! greetings from italy

@zarifzaman8959 3 жыл бұрын

LOVE this video. Please make it a series and continue with more episodes

@boris5448 3 жыл бұрын

This would be a great series to continue!

@valshaev1145 3 жыл бұрын

Even I knew about this matter, it is enjoyable and entertaining to watch your experiments! Thanks!

@akhurash 3 жыл бұрын

Worked almost 2 years on a automotive 12V to 230Vrms power inverter (modified sine wave output), with start/stop support. It definitely is not as easy as people on the internet make it seem. Majority of the cheaper inverters on the market are modified sine wave, which has an issue of high inrush current at the AC output due to the square wave nature of the voltage. Pure sine wave inverters require a lot more design work and complexity but somewhat solves this issue. After working the project for such a long time, I had to add in a secondary voltage stabilizer, such that the input voltage will not affect the AC output. The feedback you mentioned is critical in maintaining correct RMS output voltage, along with the frequency. I ended up also adding a constant current mode controller on the secondary side to help bring up capacitive loads (such as common chargers we find now a days).

@sebastiank686 3 жыл бұрын

pls make a series out of this, this is really entertaining

@electronichaircut8801 3 жыл бұрын

Love this series

@poopfartlord9695 3 жыл бұрын

This is a fucking great idea for a series, more, please.

@mathmagics8212 3 жыл бұрын

i always loved your videos. never skip your videos

@halbvoll1 Жыл бұрын

Great, please more of them

@MathieuBosi 3 жыл бұрын

Great series idea!

@mmh1922 3 жыл бұрын

Scott is Great, as usual.

@0lAlex0 3 жыл бұрын

I like this new format, more pls!

@attackaffection5444 3 жыл бұрын

This series is gut continue!

@danishdart 3 жыл бұрын

Thanks Great Scott. This video is a very much needed warning for beginners in hobby electronics.

@pranjalbhagat667 3 жыл бұрын

I will eagerly waiting to see you next time... I have subscribed you from last 4 - 5 years. Thank you so much for sharing knowledge... It helps always...

@greatscottlab 3 жыл бұрын

Thanks for watching :-)

@grantscott1686 3 жыл бұрын

You should definitely make more of these videos, I love these

@MicroProjects 3 жыл бұрын

Your every experiment learned me a lot

@maximilianpetersen8068 3 жыл бұрын

Die Serie ist geil, mehr davon

@cebas42 3 жыл бұрын

Great learning, as always! Thanks

@nistakmahmud 3 жыл бұрын

Loved your new video... we demand more like this love from Bangaldesh

@rsattahip 2 жыл бұрын

Your videos are great, thank you.

@handlesarefeckinstupid 3 жыл бұрын

Read the title, laughed and subscribed. I wasn't disappointed.

@nac9494 3 жыл бұрын

Thank you Scott

@chewbaccarampage 3 жыл бұрын

This was a great idea! Looking forward to more like this!

@vatspanchal6146 3 жыл бұрын

Hey Scott! You could make more videos of random circuits found on internet. And then maybe in same or other video address all the flaws and drawbacks to make a more or less perfectly working circuit. That would really help people understanding what is wrong and what is write way to do things. Love your videos❤.

@jasonruch3529 3 жыл бұрын

Thank you! Saved my butt with this one!

@harshgandhi100 3 жыл бұрын

Please do more of this series🙏

@gacherumburu9958 3 жыл бұрын

Nice series!

@latemhh5577 3 жыл бұрын

Great new series

@TechBuild 3 жыл бұрын

This series will greatly help beginners who otherwise, might fry up a lot of stuff. Keep this going.

@greatscottlab 3 жыл бұрын

That's the plan!

@jamiejoker118 3 жыл бұрын

Way over my head but love watching your videos learn a lot Thank you

@Infiniteknowledgenikhilrathod 3 жыл бұрын

Very best information still continue to this series

@greatscottlab 3 жыл бұрын

Will hopefully do

@ChrisHalden007 3 жыл бұрын

Very interesting video. Thanks!

@nickush7512 3 жыл бұрын

Great Dude, thanks and appreciation from every angle...

@hemanthkumarr6856 3 жыл бұрын

We need more videos like this!! Love your videos

@greatscottlab 3 жыл бұрын

More to come!

@hemanthkumarr6856 3 жыл бұрын

@@greatscottlab can u make a SMPS circuit found in internet like using MEJ13003

@whoknows8225 3 жыл бұрын

More of this please!

@TanukiTakey 3 жыл бұрын

I love this kind of content.

@AlvaroGomes 3 жыл бұрын

Great to have videos on the channel dedicated to testing different circuits spread across google

@abhishekkuksal5700 3 жыл бұрын

Totally loved your efforts!

@Delali 3 жыл бұрын

Vote GreatScott for president. I love your videos man. Its just so educative.

@electroumit 3 жыл бұрын

Thank you. Good work.

@charlesy9928 3 жыл бұрын

You are an inspiration for the beginners like me....

@jimmytorreon9615 2 жыл бұрын

very thanks for your video sir.

@jamesgrim8606 3 жыл бұрын

Always educational videos he always knows how to explain the circuit schematics in a way everyone can learn how they work.

@RedRacconKing 3 жыл бұрын

Love the new series!

@edwardvanhazendonk 3 жыл бұрын

Thanks, interesting and a never ending series might be possible! Keep up informing us on these nice circuits which are somehow not ment to be implemented!