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

[@karsanuma]

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]

@karthick Exactly my point

[@JADES-GS-z13-0]

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

[@nistakmahmud]

We need more episode....

[@adityashukla7849]

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

[@greatscottlab]

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

[@BobBeatski71]

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

[@firefox1136]

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]

@@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]

@@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

[@RaduTek]

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

[@williammathew8395]

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

[@chrismayer8990]

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

[@Thats_Mr_Random_Person_to_you]

I burst out laughing!!

[@jurgmanx4644]

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

[@paradox3875]

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

[@greatscottlab]

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

[@Ilikeridin]

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

[@aeleequis]

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

[@Gastell0]

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

[@greatscottlab]

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

[@postualin6551]

@@greatscottlab 🤣🤣🤣😂😂👌

[@stevenanderson9532]

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

[@angryman9333]

@@greatscottlab hahahaha

[@xzerr]

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

[@joshnabours9102]

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

[@Asu01]

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

[@sqbronco1]

that is totaly like my mom

[@Arctic_silverstreak]

Lol ikr

[@calebp]

haha

[@dsnein]

Lmao

[@johndavid360]

Lol

[@ToniPlays_]

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

[@greatscottlab]

Thanks mate :-)

[@RAM_e-Solutions]

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

[@greatscottlab]

I will see what I can do :-)

[@ryanf1478]

Absolutely love the idea of this video series!

[@greatscottlab]

Glad you enjoy it! More to come hopefully

[@proxyhx2075]

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

[@greatscottlab]

More to come!

[@mo938]

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

[@aeleequis]

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

[@69iqtutorial]

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]

More to come! Hopefully.....

[@dennisbengel11]

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

[@amaankhan3762]

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.

[@Xsses]

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

[@stopPlannedObsolescence]

deception face time xdd

[@Eagle-md6ku]

Same!

[@tornadokat]

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

[@cezarcatalin1406]

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

[@kapytanhook]

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]

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

[@jurgenkriebs9405]

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

[@eDoc2020]

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.

[@meowcula]

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

[@sahasananth987]

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]

Stabilo Point 88

[@sahasananth987]

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

[@akhurash]

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).

[@ChristieNel]

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

[@dabig_guy2204]

keep the videos coming. thank you.

[@greatscottlab]

Will do!

[@pranjalbhagat667]

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]

Thanks for watching :-)

[@starsistor]

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

[@gregthatcher919]

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

[@BloodAsp]

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

[@TechBuild]

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

[@greatscottlab]

That's the plan!

[@DigBipper188]

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]

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.

[@MrKristian252]

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"

[@BensWorkshop]

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.

[@vatspanchal6146]

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❤.

[@alexandervohringer5086]

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

[@greatscottlab]

I can put it on my to do list

[@alexandervohringer5086]

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

[@martinlucero9594]

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

[@grugbug6116]

Please do video with sg3525

[@joshuacollins385]

More of these please and thank you.

[@ColinTimmins]

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

[@adosaro]

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

[@Kevin-jz9bg]

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

[@tothemaxx1991]

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

[@jimmytorreon9615]

very thanks for your video sir.

[@jalilurrehman8984]

3:30 nothing blew up and nothing is too hot. I always use this to get confidence on new circuit. Great content thanks for sharing

[@greatscottlab]

Thanks for watching!

[@taylorlindley5578]

This definitely needs to be a series!!!

[@Vivekstark68]

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

[@77Superfreak]

Dude!! exactly 2 weeks ago I made this deal, it worked to 120v for about 2 minutes!!, and like you said, the heat changes/kills things on this and BOOM Rico, it killed the 2 transistors. I might still build it again but with mosfets. Yes I got obsessed, and found a forum with over 60 pages of comments from the last decade, they got obsessed too!, it's the apparent symmetry of the circuits!

[@Graham-ce2yk]

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

[@burnttoast5407]

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

[@EasyOne]

Useful Tips

[@alfonsine1836]

Yes

[@coler154]

I love this new series, Please do more!

[@eduardbolchi7672]

maaan... i was really hopping you would add a feedback circuit and fix everything...almost... a great one... for years i'm putting off making one... now i know i did good... but would still love to see you build one that is actually good... keep it upp love your videos

[@jacobjockey]

please keeping this series up we need it

[@sebastiank686]

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

[@danishdart]

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

[@jamiejoker118]

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

[@Robyrob7771]

Nice to know. Always test new circuits.

[@AlvaroGomes]

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

[@venkateshks6664]

There are so many circuits on you tube and the internet about changing voltagelike buck boost and variable voltage circuits. But none of them mention the voltage under load or about the current variations. That makes thosse simple variable V controllers like tose with lm317 etc to break down under load and in real conditions. Would you kindly enlighten hobbyists like me about such circuits? You seem tomake dependable circuits and your explanations are thorough and undertandable. Thanks for your contributions and kindly continue to do so.

[@zarifzaman8959]

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

[@Delali]

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

[@jamesgrim8606]

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

[@pascalvonrotz6555]

Cool video 👍 Please make more circuits from the internet testing videos

[@greatscottlab]

I will try my best

[@pascalvonrotz6555]

@@greatscottlab Hello I hope you had a good day Electronic is my hobby But I am not as experienced as you With the help of a college I builded a cnc

[@pascalvonrotz6555]

@@greatscottlab Cool

[@valshaev1145]

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

[@atom2319]

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

[@kumin0312]

Love this new series...

[@grantscott1686]

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

[@brunofa4559]

You should do a "Circuits I found on internet" and after that you can do a proper one and shows how it should be done the correct way. Great series

[@vrushantpatel3434]

Please keep making such video more . They are ready helpful for engineering student like me

[@gani2528]

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

[@charlesy9928]

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

[@nistakmahmud]

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

[@Infiniteknowledgenikhilrathod]

Very best information still continue to this series

[@greatscottlab]

Will hopefully do

[@garyhalsey7693]

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

[@mushroomsamba]

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

[@mmh1922]

Scott is Great, as usual.

[@MicroProjects]

Your every experiment learned me a lot

[@tanmay______]

This series is going to be fun!

[@mathmagics8212]

i always loved your videos. never skip your videos

[@harshgandhi100]

Please do more of this series🙏

[@hemanthkumarr6856]

We need more videos like this!! Love your videos

[@greatscottlab]

More to come!

[@hemanthkumarr6856]

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

[@jarodwaisanen1031]

A bluprint style intro. I love it

[@robertkoen5506]

Maybe I'm missing something obvious here but surely you could rectify the square wave into nice sinusoid by adding a BPF (or even low pass) centered on 50Hz directly before the transformer. You could also tune the gain as much your op-amp would allow to get a better voltage level.

[@jdh30]

If you want a minimal oscillator, here are two: 1. Connect a relay to itself such that it turns itself off when it is on and vice-versa. Put a capacitor across its coil to slow the oscillations down. 2. Program an Arduino. If I wanted an inverter I'd use an Arduino's to drive a MOSFET to energise the primary coils following a sine wave via PWM and maybe an LC to filter out the fundamental. Might need a MOSFET driver if the frequency is high enough.

[@EDISON_SCIENCE_CORNER]

Great Scott ! ❤️ Test fm transmitter and li. Ion battery charging circuit ❤️

[@nac9494]

Thank you Scott

[@hamzakhan-mo4bv]

I think this kind of videos are more interested than complex projects.

[@sharifuzzaman.shawon.90]

You should continue this series❤️

[@PatnaikUC]

Excellent analysis. Thanks a lot

[@rodrigolima661]

very very very good. Thank for alert and share with us. Regards from Brasil.

[@greatscottlab]

Glad you enjoyed it!

[@EasyElectronics2412]

I was expecting an inverter video today! And here it is!!!! 😅😅😅😅😅😅😅🔥🔥🔥🔥🔥

[@omtandon2741]

same here, from soooooooooooooooooooooooooooooooooooooooooooooooooooo many days

[@boris5448]

This would be a great series to continue!

[@Dinkleberg96]

I saw ur post on facebook the other day so i already know what's gonna happen but of course check ur vid was the first thing when i got home after a 12 hours drive. And i only would "copy" circuits from good known electronic sources like you, electroboom, diode gone wild, and other good youtubers. Keep the awesome work man! PS: Ur excitement while saying the outro // Everyone liked that!

[@Virtualiz]

"So let's hook up an oscilloscope and see that sinusoidal waveform" (S I L E N C E) (ANGRILY SCRIBBLES OVER WHAT HE JUST READ) this was pure comedy. Thanks Scott

[@electronichaircut8801]

This reminded me of zoombombing in my class.

[@noanyobiseniss7462]

You should provide a link to a circuit that performs the task correctly in the description for those actually wanting to build one. Adding a grid tie circuit (to an actual functioning circuit) would also make a nice video.

[@yeahbucka3005]

Get 40bucks and buy proper inverter IF you need one. If you ask for ready to go schematics you should not play with 230V. Coffins are expensive.

[@plinioferreira4255]

Man, I like your videos even before watching because I know they will be great!! Thank you!

[@mubbashirshirazi3758]

hey there i have few sugestions regarding the project firstly the phone charger mostly can work with a input voltage between 80v AC (RMS) up till 240v AC and it mostly can also work with little bit voltage above that and since the charger first rectifies the input voltage so you can also directly hook up to a 115VDC to 340 Vdc power supply it doesnt matter what is the frequency of the supply secondly it is very important to choose a right kind of transformer it would be more efficent if you had used a ferrite core transformer along with an oscilator circuit that works in range of 20Khz to 60Khz range to step up the voltage using a dedictated PWM Control IC that also has output feedback and and you can also add a SPWM based topolgy to get a pure sine wave at the output

[@randomleinadz8883]

I like your new series.. trying circuits from internet

[@halbvoll1]

Great, please more of them

[@balensydney]

Alooo guten tag from Australia, love your videos. Danke

[@mohinderkaur6671]

Dead time to reduce cross conduction helps a lot , just use 3525 or 494 controller chip. varying pulse width can help provide some regulation too. Introducing a higher frequency PWN over the square wave essentially gives you pwm generated sine wave.

[@The420376]

Please continue this type video and make a seperate playlist for that . Thank you