The following diagram is the basic design diagram of inverter circuit. The circuit will convert 12V DC to 120V AC. This basic inverter circuit can handle up to 1000Watts supply depends the T1, T2 and transformer used. Please see the note.
Basic Inverter Components list:
| Part | Total Qty. | Description | Substitutions |
| C1, C2 | 2 | 68 uf, 25 V Tantalum Capacitor | |
| R1, R2 | 2 | 10 Ohm, 5 Watt Resistor | |
| R3, R4 | 2 | 180 Ohm, 1 Watt Resistor | |
| D1, D2 | 2 | HEP 154 Silicon Diode | |
| Q1, Q2 | 2 | 2N3055 NPN Transistor (see “Notes”) | |
| T1 | 1 | 24V, Center Tapped Transformer (see “Notes”) | |
| MISC | 1 | Wire, Case, Receptical (For Output) |
Notes:
1. Q1 and Q2, as well as T1, determine how much wattage the inverter can supply. With Q1,Q2=2N3055 and T1= 15 A, the inverter can supply about 300 watts. Larger transformers and more powerful transistors can be substituted for T1, Q1 and Q2 for more power.
2. The easiest and least expensive way to get a large T1 is to re-wind an old microwave transformer. These transformers are rated at about 1KW and are perfect. Go to a local TV repair shop and dig through the dumpster until you get the largest microwave you can find. The bigger the microwave the bigger transformer. Remove the transformer, being careful not to touch the large high voltage capacitor that might still be charged. If you want, you can test the transformer, but they are usually still good. Now, remove the old 2000 V secondary, being careful not to damage the primary. Leave the primary in tact. Now, wind on 12 turns of wire, twist a loop (center tap), and wind on 12 more turns. The guage of the wire will depend on how much current you plan to have the transformer supply. Enamel covered magnet wire works great for this. Now secure the windings with tape. Thats all there is to it. Remember to use high current transistors for Q1 and Q2. The 2N3055’s in the parts list can only handle 15 amps each.
3. Remember, when operating at high wattages, this circuit draws huge amounts of current. Don’t let your battery go dead :-).
4. Since this basic inverter project produces 120 VAC, you must include a fuse and build the project in a case.
5. You must use tantalum capacitors for C1 and C2. Regular electrolytics will overheat and explode. And yes, 68uF is the correct value. There are no substitutions.
6. This circuit can be tricky to get going. Differences in transformers, transistors, parts substitutions or anything else not on this page may cause it to not function.
this is fabulous and fantastic. Most of this components are sub-standard in Africa.
I am building this circuit for a class project. My teacher wanted me to filter and smooth out the square wave to sin wave using low pass filter. I was wondering if you can recommend placement of the filter and the size of inductor and capacitor used to do this? I hope you can help me out here. Thank you!
Good day Sir, would like to ask your help if you could share to me a simple inverter circuit diagram that has a capacity of 15Kilowatts. 24volts dc input and 240volts ac output. i would highly appreciate it if you could help me. Thanks and more power..
good evining sir,
i have to design a small size inverter.so plg tell me what a best components to design a inverter& which process is best to design a iverter?
can the low quality transistor be efficient to use coz some of these components are a bit expensive to buy.
can you tell me what transistors to use to get 1000 watts?
please is TIP3055 and 2N3055 of the same capacity?
Sir,
i want to need 12v to 240v 1000v inverter circuit diagram. plz, send all components detail for me. the transformer and transistor rating and also, send battery detail for these requirements.Finally, i have an one doubt this is pure sine wave inverter circuit.kindly, send to me.
I have a home inverter. I think it works normal during daytime. At times, during night, when mains power fails the inverter switches to UPS mode. Even when mains power comes back, the inverter does not switchs back to ‘Mains power’ mode but hangs in ‘UPS mode’ for quite some time and much later, say around 6.30 in the morning the inverter switchs to ‘mains power’ mode. Please let me know what could be the problem – whether the inverter does not work properly when the voltage is high or low because my hunch is that the supply may be high or low late in the night when the general usage is less. Thanks for your help.
sir please tell me how it work and please send me for more power invertor about 100kwatt
good day sir,am really thanking God for using people like you to inspire me. I am a student of the federal university of technology akure wit matric no PMT/O8/5127.please can the transformer removed from a 9V radio be used as the T1?and wat shld be the voltage rating of the capacitor to be used?my E-mail is prosperlomo25@yahoo.com.thanks
sir, i use normal capacitor but the capacitors are brust,2nd can i use the old UPS transformer?please help me .thank you
i dont really have any question now but i like dis web,is interesting
hi friends
help to me
friends i have few doubt on this inverter circuit…plz help me to clear..
1.where i connect battery in this circuit?
2.how to recharge the battery?
3.rectifier circuit need for this inverter?
friends do the needfull..
i eagerly awiting for your comment…
I love assembling utile info, this post has got me even more info!
I want circuit diagram inverter
Dear Sir,
Can i use 6V,4.5AH battery to feed as input to this circuit, because i need to light up a 11W,230V CFL during power shut off. Or please suggest me a proper circuit for this circuit. Awaiting for your reply sir.
I am tying to repair an old toy that runs on batteries. What I am looking for is a circuit that will convert (invert) 9 volts DC to 3 volts AC 60 hz. low power output I know that it can be built using two transistors and an 555 timer ic. The problem is it has been so long since I have done anything like this, I have forgotten. Thanks in advance.
Hello people 🙂 I wondered if anybody knew if i could use wire wound resistors ? @ 5 watts i cant find bigger than 2w regular resistors
miloman – sm0vpo.com (harry L) I have made alot of his circuits, they have all worked exceedingly well for me..
inverter for 12v 7ah battery 200v 5a
dear sir ,is it possible to connect multiple batteries of 12v (car batterries) in series to produce about 220v dc then using a circuit to invert the 220v dc current to 220v ac current pls send me cicuit iam waiting for ur reply
sir,
i interested in electronics and i have a 45w cfl inverter which does not charge to battery. i open card of inverter, there 10uf 440v capacitor blown and i replace this by 46uf 440v capacitor but after this does not charging. please help….
I want to make 12v dc to 240v ac,500 watts inverter.plz send the message which requirements i need and send me circuits and parts name in my mail address
Hi I am interested in building this i have everything down pat except I was wondering were i should connect the fuse into the circuit and what size fuse should i use thanks
Dylan
by the way the power required to produce is around 1000-1200W
dear sir ,is it possible to connect multiple batteries of 12v (car batterries) in series to produce about 220v dc then using a circuit to invert the 220v dc current to 220v ac current ?if you have any circuit diagram please send .your prompt reply will be highly appreciated.
Der sir, iam chndra nd interested to make a home appliences inverter 12V DC to 230 VAC,500 Watt. Plas send me the circuit diagram of inverter
actualy you have done a very nice work. What is ur practical review? Kindly send me the cct. Diagram and the write up. Thanks for ur effort
I need one KVA inverter circuit digram
what about inverters made using PNP transistors otherwise i love your diagram keep sending them to me please
sir it can possible you send me Diagram of 500w to 5 kva Circuit Diagram i m from pakistan we use all Equipment AC 220v Standard.
i m waiting your fastest response my cell no is 0092321-8218844
Pls sir i need your phone number send it as soon as possible
Hi guys my name is kamal i am living in nigeria bauchi state.i have an inverter circuit which it is output is square wave so i want to change or convert square to sine wave.so i used with capacitor and inductor.so it can convert square to sinewave.for more details call me.08057583786 or mail me.kamalkmc12@yahoo.com
I am really highly impressed going through your website. It has often be my heart desire to try my hands on DC-AC inverter, going through your website has revived that I-can-do-it altitude in me. I would be very grateful if you could assist me with other necessary information/materials to fulfill my dreams. Also I will like you to throw more light on the effect of connecting induction load to DC/AC inverter.
I want to design an inveter of 5KVA for my project and I need your assistant,material.thanks
I want to start a blog that everyone will read. After all, my opinions are extremely important. How do I get started?.
Dear sir
please also give its operation &how it works
Dear sir
I want to make 12v dc to 240v ac,500 watts inverter.plz send the message which requirements i need and send me circuits and parts name in my mail address.
d component is incomplete but correct diagram no center tape
desparetly in need of a 24/48 v DC to 2.5KVA AC inverter circuit, please am eloka at h3lokar@yahoo.com
please i need a 2.5KVA DC to AC inverter circuit, {h3lokar@yahoo.com }get back to me is urgent please
the first and secon digit are th denom’s and the third is the # 0’s ,,,well I have some .068’s and some .047’s now what? and what about those taht have “4700-K and “J percentage of accur”written on them are they 4700uf, nf or what the ****!
these code’s, surely the brains that come up with this stuff can write out THE CODES
“Harry “Lanthall ?” Harry’s circuit’s uses the same M/V circuit 3055’s without the Cap’s. and Though I haven’t built it either,,NO CENTER TAPP at present he has a vidieo on youtube too and it works,,,,,,comments anyone?
this same circuit is posted on youtube under “crazzigs” site and the C’s are 47uf tant’s he got the circuit from somewhere else,, anyone owant to comment?
What is the code for the 68uf? anyone care too anserw?
I wonder how many of you are like me and get sick of trying too gather the parts for these NEAT-O circuits, finding a local supplier like R.Shack used to be that actually had anything on hand only to find you have too,,,ORDER IT!! I started years ago gathering all discarded elect’s to scrap out and save. BUT FOR THE LIFE OF ME,,why don’t these sites start putting the “PRINTED” codes for the ceram’s Tant that you can hardly read on the part so we don’t have to spend time calculating the code and hoping WE got it right!! Thats if you can find a calculator like “ELECTRONICS 2000” that has one. Half the time I give up searching and blow the whole mess off my bench while waiting for the Post Office to deliver (1 or 2) parts! On this circuit, out of ALL the parts I have collected and shelved in my 40×30 shop, I have mangaged to find 0ne 68uf ceramic,,,,at least I believe thats what I have, ONE!! will a pair of 47uf’s do the JOB?
want 5000volt from car battery suggest me urgent!!!!!!!!!!!!!!!!!!!
i want to generate 220volts with this same circuit. can you help me with how am to go about it. is urgent!!
68uF (C1 and C2) together with (R3 and R4) is to determine the frequency. It should be valid value. Tantalum capacitor (and metal film resistor) is a must to get the right wave frequency.
i want to know if upgrading the device will permit the change of the 25V/68uF? if you are on line right now then please reply me quick. am waiting
i really appreciate people like you at least for bringing out your time to to post these circuit
and their diagrams. could you please send me a 12v dc 240ac inverter circuit diagram ?,
Regard
Hey there can any one help me out….i want to make a 4.5v DC to 4.5v AC inverter circuit….can any one help me with the circuit diagram…
Dear Sir
I have tested my project, but it is giving same output as per input, and my transsfer is getting heatedup. I tried with it 6 volt charing battery.
Pl. inform to me to make corrective action in this regard.
Thank you
Of course if you want to add a battery, it must be connected paralel. Series connection will doubled the voltage while paralel connection will doubled the electric current.
“Hi all,I have intex UPS for my desktop for 20mins backup. I want to increase the backup time to 1-2hrs. So one of my friend suggested me to use additional same battery as external Ups which can be connected with my current intex UPS whether it can be connected thru series or parallel? If i do like this will i face any problems? If yes what sort of problems? If i get answers for my above question i’ll be feel happy… Please help..”
please can you detail me on solar circuit diagram and inverter circuit diagram
sir plz send me full supll my home inverter diagram componet transformer autocut ups plz full detail me.thank u
i want home applicetion 12volts dc to 230volts ac circuit sir plese send me sir
Sir I have an UPS which is not working good it’s giving out 330vac. Can you please send me the 12vdc to 240vac 400w inverter circuit diagram so that I try to use this UPS transformer to it?
Thanks
can this company supply 5000kva inverters for some companies?
this ckt is a real simple ckt. how can i build a better one with high watt. i am thinking about building one that will give me alteast 3kw.
can u help me out with some siagrams.
Dear sir i need 825av invertor diagram andfalt find
Hi i need a diagram with parts and values for 12v dc to 220v ac 500/1000w inverter pls
dear sir, please explain in detail about inverter used in single phase circuit
Is that true that this inverter converts 12v dc to 120 v ac . What are the kind of switching elements that are used in this circuits are they mosfets, fets or thyristors.
Dear Sir
I think i is a nice progress. If you don’t mind, please give me estimate cost to design this inverter?.
Regard
Peter
pliz supply me with 1000-3000 watt circuit diagram
good job
sir, i need a three phase inverter circuit , which gives the output of three phase waveform.please also send me the simulation of the speed estimation of induction motor and position estimation of synchronous motor.which was done in MATLAB 7.1 or PSIM softwares.send me details of simulation circuit ,clearly to my mail id.
dear sir,
i am third year student i need a interesting and unique idea for my mini project pls give any idea with enough detail
Please I want to know if the diagram is for sine or square wave
this’s the bacis of inverter circuit diagram. How can i design my circuit well?
Sir, i need a simple ups circuit and methods to produce it. like that of ups of a computer.
hi, am arnold(+23408133813260) from the ambrose alli university ekpoma, nigeria. thanks for the diagram, anyways, i would please kindly ask if you can also give a full diagram for a 1kva inverter which can take over once there is power failure, as i live in an area with an epiletic poweer supply…thanks and God bless.
Dearsir
I am a retired civil engineer and desire to keep muself busy in learning about making of solar panel dry battery which could finally help me in building 12v that is dry battery running on with the solar panel.Since I am not perfect in doing so.Kindly semd illustrative information in this regard along with necessary sketches and oblige.
I shall remain thankful
Pls sir i need the circuit diagram for inverter
Dear sir plaese send my e mail eddress complete ups basic easy diagrame urgently am wait your
reply very thanks.
I Need a 5 Kva Inverter Diagram with 48 volts DC input. If you have please send me on surajbhushan@gmail.com
Thanks In Advance.
Dear Sir,
I just want to make 12v dc to 240v ac,60Watt inverter with the same circuit instead of tantalum capacitors for C1 and C2 if I use 68 uf, 25 V Regular electrolytics capacitors beacause of low power. please sugest me
please send me a simple 12v to240 inverter circuit for my PC.I will be glad ,if iwill get different types
hi sir i try this inverter but fan is not raning please reply me thanks…
Pls I need inverter diagram that has the power of up to 10 kva or more. Please send the diagram in details to my email address: isaaciheanyi@yahoo.com. I will be grateful if this is done.
A straightforward charger equivalent to a ACDC wall adapter. It applies 300mA to the battery pack in any respect times, which will harm the battery power if left connected as well extended.
please,can you tell the operation and working of these circuit
can i change the capacitor
Hello! I have the same problem as @karthik. Could you please provide use the equation. Thank you!
for the student frm edo state and all of you asking qustion on inverter, you can get theelectronics part from any radio/electronic accesory store. if u want higher kva for the inverter eg 5kva then you will have to connect 25 of those transitors in parrallel at each side to ake the total number of transistors 50, and then change the transformer to a large one, after which the total circuit will be powered with 36v. that is three 12v batteries connected in series. for more question contact me with my emial matamba2@googlemail.com. i will be willing to be of help.
please check the resistor, it should be minimum 1 Watt resistor.
sir,I have tested this circuit but the resistor 180 ohm is heated up very quickly,I would like to know the equation to calculate the values so that i can use different voltage levels as the input for your circuit.
Sir i want to design different types of invertors.Please send me circuit diagrams with compleat information about components.
Highly obligued to you in anticipation.
Dear sir
I want to make 12v dc to 240v ac,400 watts inverter.plz send the message which requirements i
need and send me circuits and parts name in my mail address.
Thanks®ards
Ravindramohan.M
Your diagrams are very in depth, very helpful! thank you.
Dear progressive minded, i am greatful to your efforts on your free tutorials. I am greatful to God that people like you exists.
I would love to have complete circuit diagram of inverter that can generate 3kwv with the necesary components and precautions through my email address if possible thanks.
I am very interested in designing ana inverter myself with the knowledge I already have about it, I will appreciate your assistance.
Thank you for your cooperation.
Mr Amodu M.
Hey this info is sufficient but wanted more discription about circuit flow.
Sir, i’m impressed with your website and i really appreciate your ciruit diagrams but please can i get a software for electronics practicals
In fact you are too much, please can all these components;Silicon diode,resistors, Tantalum Capacitor
2N3055 NPN Transistor locally purchased in Nigeria? If yes where can easily get it.
Thank You sir.
where can i insert load detector circuit?
sir i am a student of the university of benin with mat no, psc0704525 (for confirmation & to eliminate doubts) edo state, nigeria. there are so many thing i love to ask but i really want to how i can have acess to the invert component as well as solar panel. send me a reply soonest.
i need circuit diagram for 1kva pwm inverter
if u have send me on my id djkdipti@gmail.com
sir could you please explain the operation of the circuit?
the only thing is the transformer will break the bank those things get REALLY expensive when u get to the high power ones
sir iwant ordinary battery charge cut off circuits.any inverter
SIR I NEED 12V TO 120V DC TO AC INVERTER CIRCUIT, THE ABOVE CIRCUIT COMPONENTS IF NOT FOUND THEN BY SUBSTITUTIONS WHAT I USE,
could you please send me a 12v dc 240ac inverter circuit diagram,
honestly i will be greatfull.
Thanks.
how long will this project works?….tnx!!!
good day sir, I was really thankful for giving me the opportunity to have this incredible mosfet power amplifier. although i still not assembled the amps. i know that its really quite good. thank you and more power to you and god bless you.
Dear sir
I want to make 12v dc to 240v ac,500 watts inverter.plz send the message which requirements i need and send me circuits and parts name in my mail address.
Sir,
can i use other transformer?
yummmy:P thx for your tips i’d love to follow you.anyway happy new year ~~~~~~~~
i really appreciate people like you at least for bringing out your time to to post these circuit
and their diagrams.it’s been quite helpful.thanks a lot but i want to know:how can i decide to step
up the power(i.e the wattage)if i so desire and what is the current rating of this particular
circuit.thanks
Hi sir, thanksfor your site I realy like it cos it helps me a lot but the only problem I have is the inverter is not working well for me and I need more help from you.Thanks very much for your good work.
Dear sir,
I am really highly impressed going through your website. It has often be my heart desire to try my hands on DC-AC inverter, going through your website has revived that I-can-do-it altitude in me. I would be very grateful if you could assist me with other necessary information/materials to fulfill my dreams. Also I will like you to throw more light on the effect of connecting induction load to DC/AC inverter.
i am intrest to design circuit