Inverter Circuit Diagram

June 02, 2009 By: genius

Power inverter is a very useful device which can convert Low voltage from a DC source to high voltage AC. The most common power inverter is 12V to 240V inverter. Perhaps that is because 12V batteries are common. This type of power inverter usually draws current from a DC battery. This battery should be able to provide a high flow of electric current. Normally lead acid batteries can server this purpose well. This current is then converted to 240V square wave alternative current so that we may empower those electric appliances which work on 240V instead of 12V. Inverter falls in the category of expensive devices so many people don’t buy them even they need them. What if I tell you how to build an inverter yourself?

I remember when I build my first inverter, I was very happy and I invited a lot of friends to see my homemade inverter. I am sure you will feel the same. Before you start building this inverter circuit diagram, I want to mention that this circuit involves 240V and 500W which can be fatal. You should take all security precautions before building this circuit. Preferably use electricity protective gloves and try not to play with the inverter circuit when it is operational. You will need little to medium knowledge of electronics in order to build this circuit. Alright, let us get to work. There are a lot of inverter circuit diagrams available online; some of them are complex and others are low performance. I have researched on a lot of them but in the end, I designed my own inverter circuit which is comparable to any professionally made inverter but still is simple enough for you to try. Here is the inverter circuit diagram:

Inverter Circuit Diagram

Inverter Circuit Diagram

It took me less than $100 to complete this circuit.

You will need the following parts.

There is only one variable resistance in this circuit diagram which is used to adjust frequency of 240V AC output current. You should have a frequency meter to adjust this frequency of 50HZ to 60HZ as per your requirement. Please do not power up any device with your inverter before frequency adjustment because a wrong AC frequency can burn your equipment as well as your inverter.

I have used a two stage regulated power supply to avoid frequency changes with the drop of battery voltage. First stage is 7809 which is a standalone voltage regulator. It converts 12V DC to 9V DC. Then we have used a 22 Ohm resistor and then a zener diode of 8.2V which forces current to stay at 8.2V. The 22 Ohm resistor is there just to aid zener diode. The output frequency of this inverter circuit is square wave so it is not best to power up inductive loads so use it at your own risk. However I do power up fans at home using this inverter and I never had any problems other than a little decrease in fan speed and addition of a little noise. If you have any questions, please use the comment box bellow.

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430 Responses to “Inverter Circuit Diagram”

Comment from Wale
Time August 28, 2012 at 12:30 pm

Good job bros. Pls can one use the diagram to assemble all range of inverter, only to change the transformer and increase our Resistor. You can send to my email

Comment from jafar
Time September 4, 2012 at 9:26 am

hello sir i want to build this inverter, but i have no device or frequency meter to set a frequency in 60hz.what value of resestor change to 10k pot to fix a frequency in 60 hz.thanks

Comment from sai teja
Time October 2, 2012 at 11:10 am

i built up the circuit, it is working but the out voltage is only 200volts and on loading with a 60watts bulb the output voltage is dropping to 80volts i dont understand where the problem is please help me

Comment from sajeev kumar
Time November 3, 2012 at 10:28 pm

hello sir i want to build this inverter ,but i need to know about the ampere of transformer $ battery $ also automatic cut off battery charging $ change of supply that means when the main line will came at that time the inverter will cut off $ the absence of main supply the inverter will on position please can you help me to modified this circuit please give this reply as soon as

Comment from ranjit
Time November 7, 2012 at 11:01 am

hi sir , can i place two power transistor in parallel (TIP35C) instead of 12 power transistor….

Comment from John
Time November 8, 2012 at 1:37 pm

Sir, Please may you help me with a 2kva inverter circuit design and analysis as required in electrical engineering final year project work with the calculation (i.e. chapter 3)

Comment from jithin
Time November 21, 2012 at 1:01 pm

i have a ups transformer 600va but the input voltage is 7.5-0-7.5 is their any modification to use the same circuit

Comment from Menaka
Time December 7, 2012 at 8:24 pm

HELLO sir .I build your inverter.but come one said TIP 35C Transister build too much temperature.I change the transformer said.but no difference result.My trancefomer is 3V,230V,3A.My praimery 3V said.I need step up I put 12V to 3V said.My secondri said 230V.I can got problem. Only problam is one said TIP 35C come very hot.I put one said 3 TIP 35C transistor.
Sir P help me as quick as thought.Send me my .I wait for your reply.Thank you Sir.

Comment from more genius
Time December 9, 2012 at 2:22 am

Hi to every one! Genius last appearance here was last November 27, 2009 at 9:42 pm – 3 years ago, I do not know what exactly happen to him but i guess he or she is tired of answering basic question over and over again, or maybe very busy now in doing some business. You guys please do some research on the internet as you use to do for some reason and not being clog here. Anyway many thanks to genius who shared this basic, simple and low cost inverter circuit.

Comment from yeasin
Time December 20, 2012 at 12:34 am

bro i have 12-0-12 transformer in my inverter its so 220 volt but when i want to use 30 watt lam its really going down like 88 volt so please have u some advice for that
my inverter is 500 watt i built

Comment from GOKUL
Time December 30, 2012 at 6:33 pm

I made this same circuit but i have only 300w output
tell me….how many TIP35C is connected in parallel

Comment from william
Time January 24, 2013 at 9:12 pm

sir genius i am the beginner, and i would like to use your inverter. but i confuse it, how many amps of transformer are required? and the number of wire primary and secondary? and what is the position of wiring? is it the same position of a regular transformer or you want to reverse the primary and the secondary coil? i always waiting your reply sir. thank you somuch sir

Comment from owaes
Time February 15, 2013 at 6:43 am

sir i want output in sinosydol wave form,to run all kind of electrial equipment what can i do for that.
can u suggest me another circuit diagram. please sir

Comment from marcos
Time March 6, 2013 at 6:17 pm

5.5kva inverter has a problem,not peaking main power and also dc circuit breaker trips after sometime.what could be problem.
.thank you in advance

Comment from Bryskm
Time March 7, 2013 at 7:48 pm

how to invert 3v to 220v

Comment from Maung Pru
Time March 24, 2013 at 7:38 am

Dear sir, would you be able to help me on TRANSFORMER windings detail for this inverter ?


Maung Pru

Comment from yogesh kumar
Time May 23, 2013 at 2:56 pm

sir,how to make pcb of inverter.and give a ckt diagram of inverter inwhich all ncomponent are showed clerly..

Comment from Abdur Rafay
Time June 13, 2013 at 11:54 am

only 6v zener diode is available at my place . Can you tell me its alternative? thanks.

Comment from micheal h japhet
Time August 2, 2013 at 2:46 am

thanks for your concern in assisting to share your product with every one please sir help me on how to produce a bigger inverter lets say like 30kva.
thanks waiting to read from you soonest.

Comment from Maushook
Time August 19, 2013 at 11:15 pm

Can I use a breadboard to make dis circuit???…how amperes can a breadboard withstand??

Comment from Hadi SH
Time January 5, 2014 at 5:47 pm

In the Name Of Allah
Dear genius!
Thank you for your Share!
It is one of the best circuit That I see to now!
Thanks a lot!

Comment from abdul lukman joshua
Time March 13, 2014 at 1:44 am

pls, can i get a book on inverter repair. also a book on component readings and how to detect faulty components pls. help me out sir.

Comment from Adelusi Tosin
Time March 26, 2014 at 7:33 am

Thanks for your assistance. please sir i could i calculate the power stage of an inverter? on power transistor. thanks.

Comment from Engr, omoniyi olatunde
Time July 30, 2014 at 5:32 pm

I need pin detal for trasitors D313,TIP35C,7809.can i use 20 power transitor for 100w,what will be wait of the transformer.which batttery will be good for it.thanks

Comment from Emmanuel
Time October 7, 2014 at 12:43 am

pls i need all you to post all the apparatus needed for a 2kva inverter and the no of the transformer windings(primary and seconday coils) i will be happy if you could reply back.
Thanks on anticipation

Comment from Chucks ichoku
Time October 30, 2014 at 11:22 am

Am very happy, atleast av gotten all the answers i need to knw, but one thing is confusing me, hence connecting those TIP35C in parraell, does it required any values of resistors ? ? ?

Comment from jun
Time February 26, 2015 at 8:16 am

hi sir,i built ur iverter circuit and it works on ligthing,t,v but not on electricfan why,my inverter is 1000 watts my transformer is 45 amp,12 volt 40ah deep cycle battery

Comment from tamil
Time March 14, 2015 at 12:20 pm

Hi i have one doubt transformer center input is you mentioned “0” Volt but you connected 12V at battery, so kindly explain that behavior.

Comment from Generalomosco
Time March 29, 2015 at 8:29 pm

Please what ic or transistor can i use to replace ic7809 simultaneously can i use 7.1v 0 7.1v transformer for this circuit?

Comment from Emma
Time April 2, 2016 at 4:00 am

Thank you for building and posting this inverter circuit. Please, I want to know if I can use HCF4047 in place of CD4047. And also if I can use high current mosfet or power transistors to drive the transformer.

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