DIY 1kW Sine Wave Inverter (12V-220V - EGS002)

[@misaalanshori]

Sponsored by PCBWay but still makes a diy PCB, what a madlad

[@TechBuilder]

Hahaha

[@TechBuilder]

I'll be updating this pinned post often: - The setup itself isn't 1000W overall, the board on the other hand can handle 1kVA transformers, if connected to a proper transformer it should achieve 1kW. - Still waiting for the 1kVA UPS transformer I ordered. - The design was from the suggested schematic on the application notes with reference to 1kW EGS002 kit boards from forums. - MOSFETs were connected in parallel to reduce on-resistance and distribute the heat. - A larger heatsink may be required for larger transformer setups. - Please wait for part 2. Revisions have to be done on the board to work universally with inputs up to 80VDC. I prefer higher voltage variants as line traces would be able to accomodate the currents as currents are lower on higher voltage setups. TVS diodes were added on version 2 to suppress trancients. An XL7005A was added to feed the gate drive and a 78M05 for the logic supply. - A suggestion was made on adding an inductor along the line to reduce the not so good standby current this current version has.

[@thanhminh4284]

Yes sir. Thank you so much. i'm waitting new update. !!!

[@ryanunirabaga]

Can you also measure the efficiency of your design? I think its better id you add a reverse voltage protection (using a Mosfet) and an inrush current limiter (maybe using LTC7004) to prevent sparking due to high inrush because of your tank capacitor in your input side. Here's the link you can use for reverse polarity protection using mosfet. www.google.com/url?sa=t&source=web&rct=j&url=www.infineon.com/dgdl/Reverse-Batery-Protection-Rev2.pdf%3FfileId%3Ddb3a304412b407950112b41887722615&ved=2ahUKEwiNmKCUgoLtAhXQfd4KHV6RATwQFjAPegQIDRAB&usg=AOvVaw2eSUGgd99Sukx99QiUQxRf

[@quickfixengineeringltd8035]

Hi Did you do the update

[@jamiuabdulfatai1605]

You are a great man....shearing such an expensive knowledge with people ...greeting you from Nigeria Africa.

[@markp8295]

Clear titles and thumbnails like this, make me not skip adverts as I know the content is worth a bit of my time to ensure you receive some payment I could not otherwise afford.

[@TechBuilder]

Thanks!

[@lifeai1889]

Download sponsorblock

[@lazzynur]

for me who just self studied electronics, your explanation is easy to understand. thank you very much for the knowledge you share

[@TechBuilder]

Thanks! Glad it helps! :)

[@varundeonarine1888]

@@TechBuilder I tried building this design but when I turn on 12v input the 10ohm resistors getting hot an the led blinks 3 times to indicate over voltage. Do you know what can cause this problem the circuit is identical

[@nithishroy2467]

​@@varundeonarine1888undervoltage maybe

[@jimmyr7184]

I would like this project to be portable to become a complete system. Charges the battery when plugged in and runs on battery when the power is off. You have gained a subscriber. I love what you do and the explanations are very good for a French like me.

[@sofiaco1513]

I'VE BEEN LOOKING FOR THIS TUTORIAL FOR THE EGS002 BOARD FOR YEARS! YOU ARE A LIFESAVER!!!! The only tutorial I can find was GreatScott's, which wasn't that great. Others barely talked on how to build the board, since they just film kit boards. Looking forward to Part 2 -5! I really want to know the fundamentals on how the EGS002 works. You did a really great job! Subbed!

[@ElectroRetro]

Me too waiting for part 2.

[@celestialknight6955]

greatscott is the best

[@TechBuilder]

Thanks! Stay tuned! :)

[@ElectroRetro]

@@TechBuilder 👍🏻

[@ElectroRetro]

@@TechBuilder love your videos already watched 3 times.

[@trentjackson4816]

I made a 300 watt inverter from a KIT many moons ago. It did not feature a pure sinewave ouput, infact not even a modified sinewave! - its output was a square wave at 50Hz | 240VAC RMS. It powered incandescent lights, CRT televisions, arcade game machines and computers. In fact this was so long ago that the common man did not know what an inverter was. Everyone that saw my toy wanted to buy it!!! I used to use it t ok power computers at a flea market to show people that the computers work, increasing my chances of a sale. Many people said to me "how much for the box powering the computer?" I used car batteries as the DC source, but I do of course realize now that deep cycle SLAs are the more appropriate choice of battery to use. Thanks for a great video friend. 5☆ quality - you are a genius.

[@TechBuilder]

Thanks man! COOL! Those days! ❤️ I built one too back in 2010 using a 2N3055 and NE555. It was pretty dangerous without output regulation but worked pretty well, handy too hahaha. I could relate from it being a party trick project! Inverters were pretty cool before they became extremely cheap and common.

[@Delali]

I love how thorough you were about mentioning everything you did in the video.

[@oszi4399]

The first correct EGS002 video I've been looking for one for a long time, but he talked to everyone. Thank you very much!

[@quickfixengineeringltd8035]

Did you try it

[@tomashrabe9874]

good job, but that tank capacitor on input will not love heat from heatsinks

[@TechBuilder]

Thanks! I had the same hunch. Luckily the MOSFETs aren't running that hot. The transformer on the other hand is a lot hotter.

[@devenpatil2343]

@@TechBuilder of course the transformer is going to get hot A/C to the load due to the eddy currents generated you should add the cooling system to the transformer too!

[@adrianpabloalvarez2523]

I was about to write the same comment but very nice job

[@fortun8diamond]

@@TechBuilder The transformer stays hot for a really long time.

[@silviuivanov1988]

@@devenpatil2343 a fan on top or somthing connect it directly to the 12v battery. Not the best idea but bc it starts as the inverter starts it might slow down the heating. Idk try it

[@opengreenenergy]

Excellent video Angelo 👍. I have purchased this module long time ago to make an inverter, but still now I have not tried. This video inspired me to have a try with your simplified PCB. Thanks a lot dude.

[@TechBuilder]

Thanks deba! It's a nice and flexible module hehe. I do suggest modifying the PCB adding a separate regulator at the 12v line so it could be used for higher voltage input builds :)

[@opengreenenergy]

@@TechBuilder Thanks for the suggestion. I will definitely try.

[@stevebabiak6997]

I have to point out that many (maybe most) film type capacitors can have a very short life when they are connected across AC power at “mains” voltage levels. I recommend that you find capacitors for that function that are specifically rated for the AC voltage level AND that carry markings showing that they comply with the various international safety agencies; such capacitors are intended to operate in this particular manner. Those capacitors that only have a DC voltage rating (the default voltage rating type is DC when AC is not specified) don’t ever get subjected to very high AC currents, but the AC currents across a power line are unpredictable and can be high if high frequency interference sources are plugged in.

[@voiceofinsight5811]

Hi, I find your comment very interesting, is this applicable to all the listed capacitors used here for this build, i.e., - 470nF 25v Capacitor - 2.2uF +350v Capacitor - 2.2uF 25v Capacitor - 10uF 25v Capacitor - 100uF 25v Capacitor

[@stevebabiak6997]

@@voiceofinsight5811 - the 25V capacitors aren’t seeing the full AC mains voltage. Capacitors that are placed in a circuit that exposes them to the AC mains should have safety agency approval markings showing that they have been examined and determined to be suitable for such use.

[@voiceofinsight5811]

@@stevebabiak6997 Thanks for this clarification. Can the capacity of this build be increased to 2 kW only by increasing the transformer capacity to a 2 kW transformer or does any other component need to be changed, and, is the transformer ratio 7V:220V or 12V:220V.

[@stevebabiak6997]

@@voiceofinsight5811 - I did not design this circuit, so I can’t be 100%. We don’t know the transformer power capability; if it isn’t capable of 2kW then you would have to identify one that can handle that much power (and I would find one with a 20% margin, so maybe 2.5kW). Next the power output semiconductors have to be evaluated to see whether they could drive the additional power demand that will be present. Larger heat sinks might be needed. Higher power MOSFETs might be needed. If you aren’t able to figure out all of that, you might be better off just buying something pre-built to deliver the power you seek. And safety agency approval is quite likely going to come with that pre-built unit, something that the DIY version won’t have. If something hazardous occurs (a fire or electric shock injury for example), any insurance company is going to look for safety agency approval.

[@pritambissonauth2181]

Respect man, that's a complicated subject, 'pure sine wave inverters'. Where others just come & say you need to buy a professional inverter, sure, but I want to learn the inner workings . . .

[@Stevenson15]

Part 2 please! I want to know if it heats up quickly and how many amps it draws on the battery without any load.... thank you.

[@ivjik]

Thank you for the project. I will try to collect this for a friend in a private house. Good luck in new crafts. Sincerely, Ilya Borisovich.

[@Zebra_Paw]

It is very important that you use fast recovery diodes for the feedback instead of standard ones. You can use for example FR107 or UF4007, but DON'T USE 1N4007!!!

[@mikek5206]

Why?

[@TechBuilder]

At 60Hz I doubt it would be a problem. I never had problems with mine, but theoretically speaking, it would be slightly better to use FRDs.

[@Zebra_Paw]

@@TechBuilder its important because it needs to react as fast as possible to change the duty cycle when the output voltage is not correct (this rectifier is in the feedback). Sensitive devices could be destroyed if you use standard diodes.

[@africantech5]

This applicable in high frequency inverter

[@Zebra_Paw]

@@africantech5 No, it is applicable here too, because even though it is only 50Hz, during the recovery time, it could voltage spike dangerously, some devices may not like it at all!

[@teyado]

Congratulations. For the beauty of your work. But most of all, thank you for being honest in the introduction of the video. For not writing 5 kW or 8 kW for the rating. Thank you again.

[@jyronejackson4744]

If we bought the pcb would we have to use the wire to link the top ad bottom or is that done already?

[@sylvalineresources9540]

@@jyronejackson4744 it's already done

[@kirbybaes8648]

With this a DIY double conversion online UPS is not to far away. Hope you make a project like that soon.

[@alelorenzo559]

It couldn't have been done better and so well explained. It is just what I was looking for. My intention is to recycle microwave transformers using the 220v input and replace only the 2kv output coil with a 12v one to use it in reverse and get the 1000w in this project. I like that the project uses a single coil transformer with no midpoint, which makes it easier to wind. Thanks for sharing your excellent work. Greetings from Argentina!

[@computerkiller1494]

bro same! also i have a microwave transformer lying around and i think that i'll use that for the transformer

[@rhiantaylor3446]

@@computerkiller1494 A microwave transformer can be re-wound to work but efficiency will suffer due to the transformer stampings having been welded together to minimise noise/vibration. This will increase eddy current losses.

[@computerkiller1494]

@@rhiantaylor3446 yep but is better than nothing

[@popcoingaming5086]

On second thought, I'll just buy one.

[@JayPeeEV]

It's for only DIY Makers and DIY Lover's

[@MiguelDeMarchena]

there are places where buy is more expensive than craft it yourself and you may get scammed (pure sine wave without load) if you buy one

[@CoolKoon]

Feel free to do so, but keep in mind that "modified sine wave" inverters are NOT sine wave inverters and they cannot be used on inductive loads. And pure sine wave inverters are pricey.

[@godfreycarino2808]

this is not for kids stfu

[@kiyotaka269]

@@CoolKoon You seem well-versed in this topic. I'm confused about two things: 1)Why is there only one fan? 2)Does this inverter maintain a pure sine wave output under load?

[@quickquote1568]

Very smart move designing and building a low frequency, transformer based inverter instead of a high frequency, transformerless inverter. Low frequency inverters like the one that you designed, last far longer and offer a much higher surge capacity than cheap, high frequency transformerless inverters. How about designing a larger, 3 or 4kW low frequency inverter? That would be awesome!

[@davidcromapix9083]

I want to make the same project in 24v 1000w, it would be very useful if you could consider making a video about the necessary modifications for 24v dc input. Thanks for all !

[@kusnezoff8705]

I have the same request. hopefully he will do that soon or at least make a comment about it soon.

[@ajeeshvinu2984]

Am waiting for more details on this..stay blessed..nice work...

[@Joekudi]

Would love to see the tutorial on transformers too, thanks

[@TechBuilder]

Someday! :)

[@raytry69]

Fun fact: apart of producing the pure sine wave is not an easy task, most of the electrica appliances would perfecty operate on DC current. What are they: - Ohmic resistor, like heating elements, incandescent light bulbs, etc. - Machines with universal motors like drills, grinders, they operates much smoother on DC. - All appliances with switching power supply, from mobile chargers to modern computer's power supply. - Machines with BLDC motors like central heating water pump. They also have switching power supply. The last two appliances' power supply's first task is make DC from AC. Thus they will work on DC just as well as on AC. What will not work: - Induction motors. - AC transformers. These lists are far from complete but most of the electrical appliances around the house will fall to the first group. One major disadvantage of the DC current is the stubborn electrical arc in the switches what makes serious damage in it.

[@energiavadasz3328]

You are a Genius. You will do great things in your life.

[@africantech5]

Amen

[@frankysnephew]

Could you please provide the link for Part II and III you mentioned at the end of the video? Thanks.

[@francoisguyot9770]

Excellent tutorial. I wish i could slow it down to 85% as 75% is a little trailing, but I'll rewind as needed instead. I definitely will study your instructable, mostly when you release your part 4: Smart 48VDC version. It would be awesome if it had a center tap on the secondary winding of the output transformer so that we can have the option to wire it at 110VAC for common US appliances.

[@computerkiller1494]

you can directly use a 110v transformer instead of the 220v used in the video

[@jimbo2942]

can't you ajust it to 110v with the volt damper thing he used to go from 200-220v

[@shilohwehrmacht2947]

​@@computerkiller1494can you find a link to one? I been searching the past half hour and keep only finding inverters

[@computerkiller1494]

@@shilohwehrmacht2947 a link to what? a 110v to 12v trasformer?

[@shilohwehrmacht2947]

@@computerkiller1494 no 12 to 110?I'm trying to use it to convert into ac from 12 volt batteries and function on standard American appliances

[@zlane71]

I have just built one and I have to say that there are a few mistakes in the diagram which shows the placement of the components. Check them please, because according to schematics 4 resistors are not placed where they should be. 2 resistors of 10R should change places with 2 resistors of 10kR. Also you should have coloured two more red dots to show connection of the top and bottom. They are under a resistor and diode group. By thy way, after correcting the things mentioned above everything works great. Thanks.

[@zet-azahau3520]

can you send me corrected schematics 4 ( [e-mail] ). I also built this and got error, I don't know how to fix it.

[@zlane71]

@@zet-azahau3520 Check your mail.I have just sent you corrected diagram.

[@jyronejackson4744]

Do you still have this corrected schematic?

[@tamermohsen8282]

⁠hello, do you have this corrected diagram?

[@roidroid]

0:36 Desktop computers are technically DC appliances. Internally they require only a source of 12V, 5V & 3V DC. Not being pedantic, i mention it coz you can get pure DC power supplies for computers (require only a 12V DC input) and i think they're a really good idea. Wish i saw more of them. They're probably really good for making your own UPS for your PC too - coz there's no need for an inverter, you just keep it DC the whole time, thus adding batteries into the mix is easy.

[@TechBuilder]

That's actually in my list of power electronics video tutorials in 2021. "Converting AC Appliances To DC" It's a brief tutorial on how to bypass the AC-DC portion frim devices, add connectors and proper switching regulators. This way you don't get to lose power from the typical DC-AC AC-DC convertion process from the typical PV setups. I'm also planning to build a proprietary plug for my workspace that acarries the 220VAC grid line and 48VDC directly from my battery & BMS. As for the PSU to inverter, it's not a bad idea! I've seen people make square wave inverters out of them. It will most probably lack some components for a pure sine, but I'll see what I can do. Thanks for the idea!

[@ezequielgembi]

Hello, what is the purpose of the integrated (IC) that is on the board at minute 1:38? I see that the EGs002 data sheet only needs the MOSFETs as basic.

[@sylvalineresources9540]

You need to listen more carefully

[@muhammadfarooqi]

believe me.. I will never build it.. but it was so interesting to watch! :)

[@ivailosirakov4997]

Why not?

[@muhammadfarooqi]

@@ivailosirakov4997 Because I don't know electronics.. I' not ready to catch electric shock yet.. I'm not ready to burn my hands.. I'm a programmer very good with keyboard.. :) ... simple Electronics are as easy for me.. as easy to understand if one says.. "earth is flat" ...

[@abelddamulira7817]

Something you can just plug in and use like the one you have just built. Thanks for the good work you are doing to open up our thinking outside the box.

[@AnilArya51]

Hey bro I wanted this thank you, thanks a lot it's like I was searching how to make an inverter on Google and I got the notification

[@TechBuilder]

You're welcome. Enjoy!

[@AnilArya51]

@@TechBuilder bro could you add a feature to switch to power when power back and vice-versa so that I could use it power my routers and raspberry pi server, this will be a great help because online classes will not be interrupted.

[@big_o1952]

@@AnilArya51 your router probably needs 12 volts to work just make a safety circuit and connect it to your battery

[@AnilArya51]

@@big_o1952 I have two of them (router) one is a onu supplied by the ISP and other is Tp-link wifi 5 router and also raspberry pi and power here fail when rain starts or breeze passes and I have the raspberry Pi when power goes it may get damaged.

[@lumawhtut1109]

Build the green board yourself !!!? One of a kind

[@docwilson5384]

TechBuilder love your channel and your work is amazing. i would love to see how you assemble the solar power box. i have a question, i notice you didn't ground the inverter to nothing, i have took a 1500 watt inverter a part a notice that they had ti ground to the casing of the inverter, do you got to ground your inverter or is it already grounded when connecting it to the battery makes it grounded. Please let me know....Peace

[@adam207321]

Fun fact you can use a regular angle grinder with 220V DC aswell...and most of the drills too. Because they are the universal motors so it don't matter

[@josepeixoto3384]

All those tools, they all have speed control, i think that if you run a 110 volt tool on 220 volts,it will let the smoke out, and then you need to buy another one, no?

[@adam207321]

@@josepeixoto3384 yes. If it was a 110V tool it would let the smoke out on 220V But an angle grinder can still run at its own mains voltage, but instead of AC, it can run on DC aswell (DCV of it equivalent AC voltage rating)

[@eddyfontaineyoutu100]

Can i use a toroïdal xformer instead of a "E/I" type ?

[@greatalberto_tech]

Yes. They are very silent. Be sure to check the power rating.

[@Caeralex]

can I use irfz44n instead of irf3205? and why you need 16 transistors, as there are only 12 transistors on the board. I built the board and I have to assemble the pieces!

[@lunadelta6997]

Same question

[@rainnier7514]

Hello po! I love your videos. Keep doing it! Your'e gonna be big someday kid.

[@TechBuilder]

Thanks sir!

[@Tiyagi99]

Please add some battery charge control circuits for lead acid battery to be used with this inverter.

[@southernautodiy2643]

This guy reminds me of greatscott lol

[@Tiyagi99]

Lol. He made it too complex for himself.

[@rhiantaylor3446]

Just to observe that, contrary to what is said in this video, the required transformer is NOT 12v to 220V. A 12v input can only produce a 12v peak value therefore 12/1.414 or 8.5Vrms ac at best and a 7v to 220v transformer would normally be recommended.

[@osirishz1797]

a 110v que transformador debo usar

[@sylvalineresources9540]

@@osirishz1797 you the same 6-7v to 110

[@Rothammel1]

please make a three-phase version for charging European ev's

[@ocayaro]

Here’s a tip to some who already knows a lot: cut fiberglass PCBs using a paper guillotine. It works like magic.

[@MrEmrys24]

It would be great if you could include the cost of the build

[@TechBuilder]

It would vary from where you get everything. Mine were sourced locally, the total cost was around 1,500php ($30). I'll update the links.

[@ssdkaraokechannel6784]

thank you for your videos, amazing work. is part 4 & 5 videos already available?

[@boots7859]

Man, you have one of the best video styles/presentations on YT I've seen. Great job, not sure how I missed you before. BTW, can this be scaled to US 120v ?

[@danielflores3363]

Just use another step up transformer

[@СергійЗуй-д6ш]

Да, плату EGS002 необходимо переключить (перемычками) на 60 Гц (В руководстве по EGS002 всё написано). Ну и использовать трансформатор 12/110 В.

[@boots7859]

@@danielflores3363 Thanks, that should have been obvious.

[@MrRais66]

Thanks for clear explanation and providing schematic and pcb file

[@Mothernatura]

Wow, excellent project and lots of complete info and explanations. Waiting for next episodes. I guess it would be too current demanding on de DC side, I was thinking about an alternative to run from 24 or 48VDC so we could increase the output power provided we could get a transformer up to the task. But many circuits such as 7805 and egs002 don't seem to work above 15v, and probably some others components too. Hope you could built a very high power version that's competitive in price comparing the very expensive sine waves inverters on sale.

[@computerkiller1494]

use a simple lm317 or smt similar to regulate the voltage to 12-15v

[@superknightbros456]

i made a pcb for the project and the inverter works great but i cant find a transformer

[@quickfixengineeringltd8035]

Did you use this same pcb file?

[@superknightbros456]

yup@@quickfixengineeringltd8035

[@NutScrewGamer]

I just like the way you explain stuff and I am an instant fan. Edit: I also like the way you talk

[@Graham1904]

You mention of a tank capacitor that locate between the heat-sinks but there is no mention on the schematic?

[@pesineengineering1]

Guy,you're really amazing. You just made my career grow one step further. Keep it up. Please let me know what to do in the case of a 10000w/48v??? Any changes to the circuit?

[@syedzeeshaniqbal696]

Plz help I copy your project but out put is max125 voltage how I can and what I can make change in circuit it equal to 220voltage

[@henryonugha2680]

Good job. But how do I modify the circuit for a 24v system.

[@weixing3149]

Now I know this SPWM module can be use in direct DC to AC with iron core transformer. Thanks.

[@yezzir5736]

I started on red stone tutorials for MC and here I am now….it’s been a long night.

[@keithking1985]

Nice. I must get a few of those pure sine wave boards. Must save this video.👍🇮🇪

[@xsardas1999]

Just a quick note. U shuld not trim the component's legs after soldering. It makes tiny cracks in it and can resoult in some problems afterwards. If u do trim, just reflow this soldering points. At least that what they told us on IPC training.

[@josephkarani6503]

Which transformer I'm I supposed to use to get 2kw. Kindly?

[@neinnine]

Can you make a video on that pocket oscilloscope???

[@zonatekno98]

hey did you modify your transformer winding? or just leave it alone?

[@Dc_tech386]

Great video but questions the gate diodes what type or they ziner or fast switching diodes

[@markrigneymd6570]

Very nice instruction set. I need a 3000W +/- 220v ac inverter for 16s lithium batteries thus need to use 66 - 48 V dc. Have you already talked about something like this or where can I go for information on that type of inverter. Thank You!

[@majorpygge-phartt2643]

How does your inverter get on powering induction motors like those used in fridges and central heating pumps? they need reliable pure sinewaves.

[@bikrambasumatary23]

Please upload the other parts. Need urgently. Thank you and grow more.

[@cipry1010]

what about part 2? in the instructables post you said that you will modify it to work with 13/24/48/72. did you do it?

[@黃智遠-s5k]

Chào bạn, Mình rất cảm ơn bạn đã đăng tải video về cách làm SMPS (Nguồn cấp xung đổi). Video này đã giúp ích rất nhiều cho mình. Mình rất quan tâm đến các linh kiện bạn sử dụng trong việc làm SMPS và đặc biệt cảm kích bạn đã công khai thông tin này. Một điểm mình chú ý là phần điều khiển của bạn dùng EGS002. Mình muốn hỏi là tất cả các bộ điều khiển số bạn sử dụng trong video có phải là loại này không? Hay bạn cũng sử dụng các loại khác? Trân trọng, Tri Vien 英文 Hello, I'd like to express my gratitude for your video on constructing an SMPS (Switch Mode Power Supply). It has been incredibly helpful for me. I'm particularly interested in the components you used for the SMPS and appreciate your generosity in sharing this information publicly. One thing I noticed is that you are using an EGS002 for the control part. May I ask if all the digital controllers used in the video are of this model? Or do you also use other types of digital controllers? Best regards, Tri Vien Huang

[@Dc_tech386]

I really don’t understand how the ntc can work to turn the fan on when the ntc is hot because I both 100 pieces and all of them i got volt and amperage pass as I connected current the heat don’t turn it on it’s already on so I really don’t get it I realize the ptc is the ones I need those turn on when it’s hot

[@chemeng-industrialacademy]

why are you not using high frequency multiple chopper/transformer for better efficiency

[@JandeBloois1952]

Well done, very clear, and very complete! High quality!

[@fly3209]

that transformer you connect to the output will filter very well any distortions or harmonics....

[@shopconstantino3775]

Hi keep it up. Ur doing great. Waiting for you other projects.

[@Onlyindianpj]

Perfect Video Inventory explained in details Kudos to you

[@smallick653]

For 2.2uf 25v capacitor and 470nf 25v you have done some thing different from the datasheet. Could you please tetme that it is for and how it's connected? Please reply

[@yancymuu4977]

Sir, could you please say the measured voltage ratio of the transformer please. The straight ratio of 12 to 220 would be 18.3. However if the 12v DC input produces an 8.5 volt RMS AC output, a 25.9 voltage ratio would be needed. Thank you.

[@poopface011]

I think technically, after filtering and assuming only the fundamental frequency remains, Vrms= Vdc*4/(pi*sqrt(2)). Look up the formula for the fundamental component of a square wave. Then the ratio would be 20.36 for 220 out

[@omsingharjit]

What if i wanna build same inverter but with very small ferrite Core Plus Transformer ? The plan is .. First make Lo to high volt dc to dc converter then use IGBT OR Thyristors to convert High voltage Dc 220vdc to High volt 220Vac this can reduce the size and weigh too much and maybe efficiency will increase also .. What you think about it ?

[@MDF4072]

Bless this Master of teaching. May the youtube ads god bless you.

[@electron_]

Simple and very good project. I have built almost the same. Congratulations!

[@electrosound4595]

Does this circuit work well ? Any difficulty you find ?

[@BrentLeVasseur]

Amazing! Dang bro, I was half expecting you to show the part where you made your own copper mine to mine for copper on the home made PCB. 😂

[@bakonyi72]

Excellent project. I would like to ask if you haven't done UPS yet? I would be very interested.

[@ruslank4028]

Is that transformer @1:55 just a regular 220v to 12v step down transformer you've just reversed it? Also, it doesn't look big. Is it really 500/1000 watt? Where can I get one? I could find other parts pretty much easily.

[@daniellepesci]

It looks like a 500VA APC UPS transformer, originally designed for UPS units. They are designed for step-up applications. They have thicker core windings connected in parallel to each other, same turns ratio but less number of turns (im ratio).

[@TechBuilder]

A recycled UPS transformer. I tried to search for the part number but there was no datasheet. I found a russian thread online, saying it was a 500VA transformer.

[@ruslank4028]

@@TechBuilder I have some of those UPS transformers laying around. But those are much bigger than that you have in the video. What is the resistance of each windings in your case?

[@FINSDIY]

@@ruslank4028 it's not really about the resistance but more so about the turn ratio . The resistance at the primary side of the step up transformer should be low say 1 ohm because it uses thick er wire which pulls alot of current thus trading off with voltage giving you your desire wattage

[@icraftcrafts8685]

Hi there. will you be posting the 5kw inverter build?

[@stevebailey1682]

Hi again...have you released the other 4 parts to this video series...I don't see them anywhere.

[@chukwuemek__a]

This is lovely! Can I buy a some units? If yes, where can I get

[@kusnezoff8705]

are you in the Philippines. can I transform this to a 24v to 220 v inverter by using a different transformer or does there have to be a lot more changed? thanks for the video.

[@mamoynas]

nice! One question. Why didn't you make the 2 sides of the pcb at the same time? Expose 1 side , then expose the other , then bath for the mask to appear on both sides and then etch both sides...

[@TechBuilder]

That works too! For bigger boards, doing both simultaneously for the liquid developer process is kind of tricky. You would often have uneven photo developed spots and faded lines on other areas. Doing it separately from each other is much safer in terms of success rate.

[@TechBuilder]

Thank man!

[@Electronic-101]

Де трансформатора взяли ?

[@ugurozsoy8001]

I made the circuit, it worked, but the 750 w sharpening machine did not work, can you help the card with 50 hz, is there a current limit?

[@quickfixengineeringltd8035]

What size of transformer did you use

[@ugurozsoy8001]

Thank you 1 kw​@@quickfixengineeringltd8035

[@vittalkoppal]

How much entire full kit without transformer may cost ? Can you please supply the same??

[@jodyvett23]

Did you get the cost. Would really like to know

[@ghaithal-bestenli6022]

great video man. One concern I would like to share, this transformer is a bit bulky, have you thought using a step up ferrite core transformer 12-0-220V? if yes let us know how would this be possible. Thanks

[@piconano]

I have these modules and would love to make one. Have you stopped working on future videos about this inverter? I only see part 1 :(

[@immortalsofar5314]

Yes, I was hoping for at least an indicator as to what it would take to increase the power.

[@JuanManuel123ify]

Magnífico trabajo compañero....toda una obra de arte....muchísimas gracias por compartir con el canal.....un abrazo virtual desde Las Islas Canarias (España)......

[@TechBuilder]

Muchas Gracias!

[@donovanlawson2848]

Would it be possible to give this 120-170v dc on the input and get a 120v sine wave without using a tranformer on the output?

[@msnmurthy646]

You've to create an basic oscillator, may be wein bridge, Hartley or colpitts. You can have sine wave generator(AC SIGNAL) at output of your required, without any transformer.

[@donovanlawson2848]

@@msnmurthy646 I have since found another solution, but thank you very much for the reply! I will refer back to your comment when I inevitably end up using this design.

[@aArOnlev024]

Excellent video!!! Keep up, one question, how many irf MOSFET can I set up by channel?? Your design only contemplate 6 MOSFETs by channel. Regards.

[@gadjetsgarage]

where did you buy copper boards for PCB manufacturing

[@mayoortechinnovations]

Nice work, please how can this design be modified to be able to charge the batteries, thanks

[@misaalanshori]

How much cheaper is this? Compared to other commercially sold pure sine wave inverters

[@TechBuilder]

From where I bought my components (E-Gizmo Manila & Shopee), total cost is around 1.5k PHP ($30). The cheapest decent pure sinewave inverter I could find is around $100-$200.

[@misaalanshori]

@@TechBuilder With the components that you used here, what is the maximum wattage? (Sorry if I missed it on the video)

[@TechBuilder]

With the transformer I used it's 500W. As far as it goes I've only tested up to 400W, it shutdowns by itself afterwards. Still trying to troubleshoot why. On the other hand, my 1kW 48VDC-220VAC toroidal core version works fine. @@misaalanshori

[@quickfixengineeringltd8035]

​@@TechBuilderdoes this mean I can use a 24v transformer for this circuit