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Simple 100W inverter circuit

admin

August - 5 - 2010

193 Comments

Description.

Here is the circuit diagram of a simple 100 watt inverter using IC CD4047 and MOSFET IRF540. The circuit is simple

low cost and can be even assembled on a veroboard.

CD 4047 is a low power CMOS astable/monostable multivibrator IC. Here it is wired as an astable multivibrator

producing two pulse trains of 0.01s which are 180 degree out of phase at the pins 10 and 11 of the IC. Pin 10 is connected

to the gate of Q1 and pin 11 is connected to the gate of Q2. Resistors R3 and R4 prevents the loading of the IC by the

respective MOSFETs. When pin 10 is high Q1 conducts and current flows through the upper half of the transformer

primary which accounts for the positive half of the output AC voltage. When pin 11 is high Q2 conducts and current

flows through the lower half of the transformer primary in opposite direction and it accounts for the negative half of the

output AC voltage.

Circuit diagram.

Simple 100W inverter circuit - Electronic Circuits and Diagram-Electr... http://www.circuitstoday.com/simple-100w-inverter-circuit

1 of 30 03-04-2014 13:32

Notes.

B1 can be a 12V/ 6Ah lead acid battery.

Q1 and Q2 must be fitted to a proper heat sink.

T1 can be a 9-0-9 V primary, 230V secondary, 150VA transformer .

Do not expect much from this circuit. The is very simple one suitable for low grade applications.

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2 of 30 03-04-2014 13:32

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193 Responses to “Simple 100W inverter circuit”

Khurram says:

April 2, 2014 at 8:36 pm

Seetharaman,Tell me the purpose of C4, what I think it shouldn’t place in parallel on out because it will short the

output. In D.C we can use decoupling capacitor but in A.C if u use it in same fashion through capacitor C4 all the

voltage will sink to the ground through it & output will become zero.

Reply

NILANJAN ROY says:

April 1, 2014 at 10:26 pm

sir is it can drive a mobile charger or adapter of 150-300vac , 50-60hz 0.15A

Reply

Seetharaman says:

April 2, 2014 at 12:46 am

yes

Reply

Jamey says:

March 31, 2014 at 9:14 pm

How can I make a battery charger circuit and switch circuit for this inverter? How would the all the circuits be

connected together? I want that when my main AC power fails,the inverter switches on automatically. Is the relay

work for this included in the switch circuit? Please help me out.

Reply

Chandrashekhar says:

March 27, 2014 at 5:55 am

Sir i try the 100w inverter ckt it gives 220v ac but when i put a cfl to the output the voltage becomes very low about

85v. Please sir tell me the solution.

Reply

Seetharaman says:

March 27, 2014 at 11:36 pm


3 of 30 03-04-2014 13:32

Hi check the quality of your inverter transformer try to use low loss type.

Reply

Jamey says:

March 23, 2014 at 7:16 am

How can I make a complete UPS circuit from this inverter? I think I need relays and a switch circuit, how do I

connect them? please help

Reply

kiran says:

February 20, 2014 at 7:10 am

hai sir i checked in ur

100w inverter ckt its

working .but i have

one small

problem.when i give

the load to ckt that

time the vge will be

reduced . example i

give 20w cfl to load

that time the o/p

power reduced to

20v . so pls give the

correct solution. my cell number 8088394449 please help me

Reply

okoye says:


what is capacitor c2 rating?

Reply

Akeem says:


i want you to specify me the type of IR driver cct to trigger Mosfet power cct in order to give me 5KVA single

phase inverter

Thanks

Reply

Nitu says:


Can i use 12v transformer

Reply

Muthu says:


Sure

Reply

okoye says:

January 24, 2014 at 1:44 am

is capacitor c2 a polarity capacitor or non polar?is q1 and q2 mounted on the same heat sink?

Reply

okoye says:


4 of 30 03-04-2014 13:32


what type of capacitor c2 are my going to used and the transformer details.

Reply

okoye says:


what type of capacitor is c2?and transformer details?

Reply

pranjal says:


I am unable to find IC CD 4047 in eagle software

Reply

pranjal says:


Dear Sir, please give me eagle pcb layout design for the 100w inverter. I want to make that on copper laminated

pcb.

Thanks

Reply

cyril says:


sir what transformer should i use.

Reply

Seetharaman says:


Notes indicates it should be 9-0-9 volt primary and 230 volt 150VA secondary transformer

Reply

Santhosh kumar says:

December 25, 2013 at 7:02 am

Sir i done this project. It was working good. but i want to known about the ic 4047 internal constuction how it is

giving 180 degrees phase shift pleace it is urgent am doing this my miniproject so i want to give seminar plz sir

Reply

santhosh says:


sir circuit was working………i want internal structure of 4047 ic ………..plz sir….

Reply

pradeep says:


hello sir u r using 0.1microfara 600v….. but we know that capacitor can blocks ac…… how we r expecting 230v ac

Reply

Grousselas says:

November 29, 2013 at 5:07 am

Hello,

I do not practice English fluently so I am forced to use online translation .


5 of 30 03-04-2014 13:32

I am a modest French electronics and retired for 4 years , I have invested in renewable energy for personal use (2.5

KW Photovoltaic and wind)

Everything works fine . But less than 4 years , 2 3 KW inverters sine did not take the road as unreliable.

I decided not to buy expensive and impossible to repair converters. So for almost a year , I’m looking for a solution

to build a converter 3 KW .

Currently , I experimented with a 555 + SA 4017 CD . Power mosfets IRFP 250/ 260 IRFP . The transformer is a 3

KVA new. Several mosfets are connected in parallel when the development will be effective .

The result is insignificant. Look here:

http://libre-infos.eklablog.com/electronique-c19781471

Do you think the use of CD 4047 will improve the power expected .

What is the width of the pulses delivered by the 4047 CD , compared with the 4017 CD ?

Watch here the draft very temporary mounting with a 120 W lamp that lights the secondary half . 120 volts

measured with a digital controller.

If you wish, thank you to tell me what you think.

Regards

Marcelin

Reply

sandy says:

November 12, 2013 at 11:00 pm

for inverters and solar projects

Reply

Viques says:

October 6, 2013 at 8:33 am

What is the function of that POT?.and is the transformer a normal one or do i hv to use a center tapped one?…i’m

asking this cuz i’m having 3 wires in my transformer n i knw one handles 110V..wont it smoke up the shit?!

Reply

Seetharaman says:


i Viques it is to set the frequency of oscillation to 50 or 60Hz. You have to use 230 to 9V-0-9V center tapped

transformer, use by interchanging primary and secondary.

Reply

peter k ngeno says:

August 18, 2013 at 8:06 am

what is rate of the transformer used

Reply

Sarvesh Parab says:

June 4, 2013 at 12:18 am

I wanted To Know Whether This Circuit Diagram Is Correct And Do It Work Properly ???

Sry To Say That Because i Really Want To Make That Inverter So A Bit Serious About It..

Reply

rajesh says:

April 21, 2013 at 2:24 am

hai sir i used in 12v 7ah battery , 12v/2amp transformer and 9v/1amp heavy transformer its not suited for the 100w

inverter.

Its not suit pls say how to increase the power .

Reply


6 of 30 03-04-2014 13:32

rajesh says:

April 17, 2013 at 11:59 pm

hai sir i checked in ur

100w inverter ckt its

working .but i have

one small

problem.when i give

the load to ckt that

time the vge will be

reduced . example i

give 20w cfl to load

that time the o/p

power reduced to

180v . so pls give the

correct solution.

Reply

Seetharaman says:

April 18, 2013 at 8:49 am

Hi Rajesh it may be the quality of inverter transformer, its rating or the 12 volt power supply is not capable of

providing the required current.

Reply

manikanth says:

October 24, 2013 at 11:36 pm

if we increase the battery ah ,can the ckt is destroy or not?

Reply

Seetharaman says:


Hi Manikanth if you increase the AH of the battery the inverter will work for a longer duration.

say if you use a 12 volt 7AH battery for this inverter you will get the inverter going for 45

minutes if your load is 100VA. if you use a fully charged 12 volt 40AH battery it will work for 4

1/2 hours without needing for recharge for the same load.

Reply

Sarvesh Parab says:

June 4, 2013 at 12:18 am

Do It Really Works Mr Rajesh ??

Reply

rajesh says:

April 17, 2013 at 5:35 am

hai sir i checked in ur 100w inverter ckt its working .but i have one small problem.when i give the load to ckt that

time the vge will be reduced . example i give 20w cfl to load that time the o/p power reduced to 180v . so pls give

the correct solution.

Reply

Devendra kurmi says:

April 12, 2013 at 10:20 pm

Hi, in this circuit I did not find C1 capacitor. Is it missing?

Do you have any better circuits. Does this circuit works directly on solar panel?


7 of 30 03-04-2014 13:32

Reply

a.maharajan says:

April 10, 2013 at 6:33 am

c2 capacitor 0.01 micro fared howmany voltage?

Reply

sanaullah says:

March 30, 2013 at 10:38 pm

Hello sir ! the circuit is not working ……..

Reply

Ahmar says:

March 14, 2013 at 6:52 am

what is the wattage for resistors?

Reply

sushil says:

March 12, 2013 at 8:36 am

why it is used R6 1k pot. ? what

will b problem in using of 1k

resistor instead of that pot. ?

Reply

sushil says:

March 12, 2013 at 8:31 am

why it is used R6 1k pot. ? what will b problem in using of 1k resistor instead of that pot. ?

Reply

JATINDER KUMAR says:

February 28, 2013 at 10:56 pm

the wattage of resistances are not mention.

Reply

hadi says:


hello sir i need 250 watt inverter plz help meee.

Reply

sanaullah says:


it does not work!!!!!!!!!!

Reply

wasimakram says:


Hello sir I want to make a helecoptor with remote please sent me thank u

Reply

WAKHEEL says:


Hello. plz i need of components equivalent DATA.


8 of 30 03-04-2014 13:32

Reply

WAKHEEL says:


Plz . I need component equivalent data

Reply

Azeez says:


Hello sir i need 200w inverter circuit…so can u help me?

Reply

deva prakasam says:


dear sir/madam, Is there any controversial between astable multivibrator and mono,bistable according to thier

application. answer me

Reply

chinna says:

January 14, 2013 at 12:39 am

hello sir!

Here we are using ic4047 as astable or monostable multivibrator.Can we replace with 555 timer.please reply me sir

Reply

Anish says:


555 timer has only one output. But 4047 has two outputs which are compliment to each other. Similar to a

flip-flop. Moreover, conversions like this – DC to AC, AC to DC etc has more power loss. 4047 is a CMOS

IC and hence consumes very low power compared to the TTL 555 timer. Any way the obvious reason may be

the two kinds of o/p offered by 4047 and also, it uses minimal external components than 555.

Reply

chinna says:

January 14, 2013 at 12:27 am

hi sir! can we connet 230v ac to bulbs or fans

Reply

gokul says:

December 6, 2012 at 5:23 pm

this circuit is work good but the battery is only use 7ah is used or increase the battery level….

Reply

stephin says:


hi sir

Which type of transformer i need to use for this circuit 9-0-9vAC primary or DC primary?please reply anyone..

.can i use this for running my 21″ CRT monitor tv?

Reply

rohin says:


hi, you can use normal transformer which in E,I core.transformer always works on ac voltage.you can use

9-0-9 ac transformer with 10 amp.if your monitor wattage is less than 100 w than you can use this

circuit.transformer can work both sides if you give input 220 v ac than it become step down 9-0-9 ac and if


9 of 30 03-04-2014 13:32

you give this side 9-0-9 ac then it can give us 220v ac and called step up transformer.so same transformer can

work both things.

Reply

stephin says:


hi sir

whch type of the transformer can i use for this circuit,both the primary and secondary should be in AC?

I need to run my 21″ CRT monitor tv by using this circuit ,do i ?please reply…..

Reply

Ankita kanekar says:


hi

can i use IRF540 mosfet to design 3 phase inverter ckt for controlling BLDC motor.? plz help what is the

specification of this mosfet?

Reply

SATISH SHINDE says:


HI SIR I AM INTERESTED TO 100W INVERTER INSTERTED

Reply

mahi says:


Hello sir, I also have 12-0-12v/230, 7A transformer.

Will I use it to this circuit? plz help

Reply

rohin says:


yes you can use it.

Reply

kranthi says:


Hi,

This circuit is good for implementation

Reply

Vinod says:

September 27, 2012 at 9:50 am

Hi, This is very good circuit. Do i need a special transformer for this?, What if i connect an ordinary 9-0-9 1A

transformer ?.Please help.

Reply

rohin says:


for the 100w transformer must be at least 10 amp.with 1 amp transformer you can light some neon bulb or

led.

Reply

vinay says:



10 of 30 03-04-2014 13:32

hello, i am new to electronics ,this circuit inspired me a lot, so i wanted to try it, but the capacitor c4 of

0.1uf/600volts is not available for me…so tell me any alternate..and by connecting the capacitors in parallel the

capacitance can be added no,so can i try in that way……?m plz give ma a solution for that…….!

Reply

cheralathan says:

September 11, 2012 at 7:00 pm

i want to buy an ic cd4047 in villupuram the ic does not exit..so pls send store name in pondy,or cuddalor.

Reply

jafar says:


SIR, I HAVE A 35AH BATTERY,CAN REPLACE THIS WITH THE 7AH BATTERY OF COMPUTER UPS?

Reply

rohin says:


you can replace it with no problem. wires should be 10 mm or higher

Reply

jafar says:


SIR, HOW CAN I MEASURE THE FREQUENCY?,OR THE VALUE OF RESISTER USED AT R6. PLEASE

TELL

Reply

SIGEI KIPSANG says:

August 23, 2012 at 6:23 am

Is this inverter suited for 40w ac soldering iron?

Reply

chandrasekar says:

August 15, 2012 at 2:46 am

dear Mr. govindasamy

IC 4047 is easily available one. In madurai(Tamilnadu) it costs only Rs.18. so try to your nearer big city electronic

market.

Reply

FASIH says:

August 5, 2012 at 2:18 am

hello sir i have constructed your circuit on proteus but all i am having is a 0V AC output…. please if u think that

there might be some mistake let me know. i am using a simple 12V DC battery

Reply

govindasami says:

August 2, 2012 at 11:14 pm

sir.

i need the ecavelent ic to use of cd 4047

Reply

chandrasekar says:

July 28, 2012 at 10:08 pm

sir


11 of 30 03-04-2014 13:32

In this circuit the transistors IRF 540 getting tooo much heat within seconds and Im not getting output. I use

12-0-12. 3A transformer.

what is the problem?

chandrasekar

Reply

chandrasekar says:

July 24, 2012 at 5:26 pm

sir.

when the circuit connected to AC is the battery tobe charge automatically? or we charge from extra source?

Reply

siraj says:

November 20, 2012 at 10:09 pm

hi chandrasekar!! you asked a question about the charging prob. right the same question too rised for me!! i

have post the comment, no reply for that!! did you got the answer from or you got help from others? if so pls

reply for me!!!

Reply

deepak seth says:

July 22, 2012 at 9:17 am

and how can we control the speed of 90 watt motor with this inverter circuit?

Reply

deepak seth says:

July 22, 2012 at 9:16 am

sir, for a 90 watt, single phase motor will this circuit be appropriate ? or can u suggest some other circuit.

kindly suggest something for 0.5 hp motor.220 volts. single phase input.

Reply

Anusha says:

July 19, 2012 at 5:38 am

Hi sir.. actualy i m getting the output as 82v at secondary of the transformer.I checked all the pins then i came to

know that voltage is getting droped at 4th pin there by m not getting voltage at 11th pin so the second mosfet is nt

conductng completely where m gettng only 4.35v at primary of transformer connected to drain and center tap where

in for first mosfet m gettng 9v.. so what would be the mistake..??

Reply

Nithin Pradeep says:

July 15, 2012 at 12:29 am

what is the minimum current rating of transformer.???

5A???

Reply


July 8, 2012 at 9:36 am

Can You Show me How that Transformer looks like???

Reply

Allwin M.A. says:

July 6, 2012 at 9:36 pm

Hi sir,

How can i calculate the efficiency and power factor of this circuit ?


12 of 30 03-04-2014 13:32

Is power elctronic circuits depends on power factor ?

Reply

Charles John says:

July 4, 2012 at 10:40 pm

Good job.

Reply

Seetharaman says:

July 4, 2012 at 10:07 am

Hi Nithin the transformer should be rated for 9-0-9 volt at 150VA. Use standard polyester or ceramic disc capacitor

rated for 25 to 100volt 103 for C2 and 104 / 600 volt polyester for C4. What you have indicated some imported non

standard capacitors their values will not be as you expect. Kindly nuse standard CTR / philips etc

Reply


July 4, 2012 at 6:45 am

Can you please tell the current rating of the transformer…….

Reply


July 4, 2012 at 5:53 am

i used a 103M 2 KV for C2 and 01M 1KV for C4 will this affects the working of inverter…and can a regulated dc

dual rail be used instead of a battery??

Reply


July 4, 2012 at 5:09 am

what kind of load will work in this inverter…..

i used 9-0-9 500mA transformer …MOSFETS and transformers are heating enough but there is no output …

will we get shock if we touch the o/p wire…??

Reply

Seetharaman says:

July 3, 2012 at 4:09 am

HI Nithin you can use 1N4001, Preset to fix the inverter frequency at 50 or 60Hz, With the rcommended battery 30

minutes approximately.

Hi Avinash you can get the current flow with respect to one wire in the other, hence both the wires are required. if

you say that line tester is glowing on both wires(it will sinece the secondary of the transformer is floating) if you

want to avoid this, you ground one wire of the secondary.

Reply

avinash says:

July 1, 2012 at 1:05 am

Sir plz tell me

out put of inverter ac volt come in both wire but i want to taking in one wire face in full 220vac what can i chang in

Reply

avinash says:

July 1, 2012 at 12:58 am

Sir plz tell me when the out put of the inverter ac volt come in both wire …but i am taking i on. Wire what can i

add/change in……plz

Reply


13 of 30 03-04-2014 13:32


June 30, 2012 at 3:21 am

what about the Duration of load(time)

What is the function of the preset

Reply


June 30, 2012 at 2:43 am

Hei….Thanks

Can IN4001 be used instead of 4007

Is this circuit capable of driving a TV load …

pls reply…

Reply

Umar garanzoi says:

June 11, 2012 at 2:55 pm

Sir, i want to build a circuit may i use IRFZ44N OR IRFZ46n insted of IRF540, Can it work. Also how to increase

it to 500W?

Reply

markut says:


yes you can

Reply

markut says:


I think the transformer should be 7-0-7 volts secondary winding with specific wattage as per your required

wattage output ie 500W. put 3 nos of Q1 and 3 nos of Q2. Might just work.

Reply

Seetharaman says:

June 8, 2012 at 7:06 am

Hi Sunil use 250volt tap, if available in the transformer. Hope the transformer used is 96VA rating. If taps are not

available you can use a 230V/24volt 24VA transformer and step-up the voltage.(Like a step voltage regulator)

Reply

sunil says:

June 6, 2012 at 11:34 pm

i used 12-0-12/230 96A transformer the output voltage of the inverter is 210vac.

what transformer do i ned to use in the circuit for 230vac output?

please help……..

Reply

lin says:

May 23, 2012 at 10:24 am

Hi,

Thanks for this circuit and its working great…

Could I increase the watts of this inverter by modifying this circuit?

Please help me.

Thankyou..


14 of 30 03-04-2014 13:32

Reply

GREAT ATA says:

May 18, 2012 at 4:54 am

Describe c2 fully (what is the voltage) and the size of all resistors

Reply

admin says:

June 7, 2012 at 10:32 am

C2 can be a general purpose ceramic disc capacitor (they are generally available with a voltage rating around

1KV and it is well enough)

All resistors can be 1/4W metal film or carbon film.

Reply

Leliance says:

April 26, 2012 at 11:14 pm

Hi,

I am totally new to electronic but I have always been looking to make my own inverter circuit. Its just for fun or for

my understanding purpose, I wonder if someone out here can guide me or share me their circuits. Basically, I’m not

looking to generate lots of energy from 12v battery, I need a circuit which invert 1.5v/3v to some higher range.

Write back to me if anyone can help. Thanx in advance.

Reply

Seetharaman says:

April 25, 2012 at 9:51 am

Hi Kirthik your transformer should be low loss type. If you want 45 watts out put say at PF 0.8 then the VA at

secondary should be 56VA and if the transformer efficiency is say 80% then the primary side requirement is around

70VA with 12 volt supply the requirement is 6 amps approximately. Your transformer should be for a primary of

10.8-0-10.8Volt and with a rating of 70 VA. Secondary should be rated for 230 volts. (a torroidal transformer will

be a better choice)

Reply

Athish kirthik says:

April 24, 2012 at 11:25 pm

Dear Friends,

I did the same circuit with the 2n3055 power transistor instead of IRF540 and i have used 12-0-12 ,3A transformer ,

so in this case , maximum how much Watts(W)i can able to consume from the transformer , that too even if i setted

the frequency to 50 Hz at that time trafo output was 233V but after connecting the 15W CFl voltage came to 96 V,

but if i am increasing the frequency to 300Hz then the voltage was around 172V AC ,i want to take min of 45 Watts

output so what should be the rating of transformer???

Reply

Seetharaman says:

April 22, 2012 at 9:20 am

Hi Santhosh you have to have a charger circuit similar to the one used in our emergency lamp

http://www.circuitstoday.com/automatic-led-emergency-light-modified-version

Reply

santhosh says:

April 21, 2012 at 7:25 am

SIR,

I’M BEGINNER IN ELECTRONICS WITH SOME ELECTRICAL KNOWLEDGE IN MAINTENANCE OF

HIGH VOLTAGE MACHINES.WHEN I INTENDED TO BUILD AN INVERTER FOR 3*25W CFL LAMPS I


15 of 30 03-04-2014 13:32

FOUND YOUR CIRCUIT.I’VE DOUBT ABOUT CHARGING OF THE BATTERY.IS IT NEEDED EXTRA

CIRCUIT?IS THE VOLTAGE GETTING LOW IF CHARGE OF THE BATTERY GETTING REDUCED? PL.

REPLY IMMEDIATELY

THANKS

SANTHOSH

Reply

Seetharaman says:

April 13, 2012 at 9:58 am

Venkatesh you try one of the following MTP50P03HDL IRFZ44N, K2608 MOSFET, IRF1010E, IRF740 or any

enhansment mosfet of 50amps 30volts ratings. you may contact texonic instruments for your requirement.

Reply

venkatesh says:

April 13, 2012 at 3:49 am

Thank You Sir.,

My Another Question, This is not related in this circuit , But i want your help., My Numaric 600 VA UPS in

problem., MOSFET 85T03GP Not available.,

Any other substitute for this mosfet?

Pls give the Number pls thank you., sir

Reply

Seetharaman says:

April 13, 2012 at 12:48 am

Hi Kiran this cannot be converted.

Hi Venkatesh it can be anything 16 volts or above.

Reply

Seetharaman says:

April 13, 2012 at 12:36 am

Hi Venkatesh This cannot be converted.

Reply

Venkatesh says:

April 11, 2012 at 7:09 am

Sir What is the Voltage value of c2 0.01uf?

Reply

kiran says:

April 10, 2012 at 6:11 pm

sir can this be turned to pure sine wave inverter?and what is the ampere of the transformer to get 100watt?

Reply

SUDHARSHAN REDDY says:


if u getting 100watts from a inverter, it is enough for Home ?

Reply

Aditya says:

April 10, 2012 at 5:49 am

sir.. today i have done this expt. with all u said equipments… its cost i payed 200rs…. so i made connections when i

given 12v dc supply to it then the capacitor which is placed near power supply (c3 2200/25v) it got burned… can u

tell me why this happened….?? connections was accurate… sir plz reply soon…


16 of 30 03-04-2014 13:32

Reply

Prince kumar says:

April 9, 2012 at 7:26 am

How will we the battery charge?

Reply

Akash Ali says:

March 30, 2012 at 3:57 am

Thank u soo much sir 4 giving me this precious reply…

Reply

Seetharaman says:

March 29, 2012 at 9:12 am

Hi Ali the battery capacity is given by 12 X 7AH that is 84VAH. say you draw 30 watts with 0.8PF and 85%

inverter efficiency. The VA requirement will be 44VA. dividing the capacity with this value you will get the

maximum operation duration of new fully charged battery. 84VAH / 44VA = 1.909H, that is 1hr and 55minutes.

Reply

Akash Ali says:

March 29, 2012 at 6:50 am

Hi sir… So nice circuit but i want to ask one thing that how many time battery of 12 V (7Ah) will spend if the load

is 30 watt… And whats the formula to find spending time according to load……?

Reply

Nuhu Chiduo says:

March 27, 2012 at 2:44 am

Hi friends,how can i get an IC CD4047 in Multism NI circuits 11?

Reply

Seetharaman says:

March 22, 2012 at 9:27 am

Hi Gopal check the output of IC1 at Pin 10 & 11. If OK. Check the pin details of Q1 & Q2

Reply

gopal says:

March 21, 2012 at 11:40 am

i have implemented this ckt but i am not getting out put. i check out all the connection, pls suggest where is

thechances of mistake……

Reply

Seetharaman says:

March 21, 2012 at 9:50 am

Hi Ganesan use the battery charger circuits appeared as our earlier project. You can use the following link

http://www.circuitstoday.com/car-battery-charger or

http://www.circuitstoday.com/battery-charger-circuit-using-lm317

Hi Taimur you can use, the unit will run for a longer duration. You have to use a suitable charger to charge the

battery.

Hi Vikram you have to use 10.8 – 0 – 10.8 volt transformer.

Reply

simarpreet says:

March 21, 2012 at 7:57 am

can i use 12-0-12 /220v AND 500 ma transformer in this circuit and 6v , 4AH BATTERY? WILL IT WORK ?


17 of 30 03-04-2014 13:32

please help.

Reply

ganesan says:

March 20, 2012 at 10:02 pm

hi friends…i have few doubt on inverter…that i given below..

1.how to recharge the battery?

2.rectifier circuit need for recharge the battery?

plz help me friends

Reply

Taimur says:

March 7, 2012 at 7:55 am

What If instead of 12V 6Ah battery, I use a 12V 12Ah battery ? What would be its affect? can anyone please tell me

about it? If its safe so I may use 12V 12AH battery instead

Reply

vikram says:


i used 12-0-12/230 96A transformer the output voltage of the inverter is 210vac.

what transformer do i ned to use in the circuit for 230vac output?

please help……..

Reply

kiran says:


dear sir,

Can i use this circuit to switch on a 29 inch TV[not LCD a normal one] and what will be the backup?and what type

of transformer should i use.

thank-you

from kiran

Reply

Suman says:


This circuit is fine.

But may we use it to drive 200W load by using 220VA transformer?

Reply

Suman says:


This circuit is ok.

But may we use it for 200W load with a 220VA transformer? Your kind help needed.

Reply

Udhaya says:


sir,

i would like to do this inverter. but before that i would like to whether it is a pure sine wave inverter or square wave


18 of 30 03-04-2014 13:32

inverter.

thanks in advance

Reply

raja says:


where can i get all parts of 40w inverter.

sugest can i get this circuit board in market.

am in chennai (tamilnadu, india)

thanks

Reply

john says:

January 16, 2012 at 9:53 pm

hi, can i ask? how many ampere transformer did we need to produced 100watt for load?tnx for the follow up this

question..

Reply

john says:

January 15, 2012 at 11:35 pm

hi sir, thank u for sharing this ideas, looking forward for the positive output, thank u again, GOD BLESS ^^

Reply

john says:

January 15, 2012 at 11:32 pm

hi sir, thank u for sharing this ideas, i have`nt try it yet, but looking forward for the positive output, thank u again,

GOD BLESS ^^

Reply

seetharaman says:


Hi Haidar use minimum 120VA transformer for 100 watts load.

Reply

haidar says:

January 3, 2012 at 8:10 pm

hi seetharaman,im already build this inverter using 12-0-12/12va at primary..it can run 40w bulb but when i use

100w bulb it not run. should i change the transformer rating?

-tq very much for your advice sir

Reply

Seetharaman says:


Hi Haidar the harmonics are taken care by the output filter capacitor C4 you can increase it to 0.47uF 630V AC.

This is sufficient to take care of all harmonics hence can be used with computer, Solid state TV etc (sensitive

electronic gadgets)

Reply

haidar says:


hi seetharaman, this circuit can run tv?

and how to reduce harmonic?


19 of 30 03-04-2014 13:32

Reply

seetharaman says:


Hi Haidar all resistances can e 1/4 watt. You can use 9-0-9 75 VA transformer you will get higher voltage with low

loads and at rated load it will be alright. 11-0-11 120VA is the transformer which suits better.

Hi Azrin you can use 12-0-12 but output voltage will be around 200volts with 230V secondary winding and with

250V winding the output will be 220volts.

Reply

haidar says:


hi seetharaman ,i have 2 question

1) can i use 1watt for each resistor

2)can i use transformer 9-0-9/230 , 75va

Reply

gopi says:


hi sir,can i use transformer 12-0-12/230,75VA?

hence what wattage i will get?

Reply

azrin says:


one more question.. what transformer that u used ? and can i use 12v-0-12v transformer ?

Reply

azrin says:


can this inverter turn on a TV,amplifier or fans ??

Reply

seetharaman says:


Hi Kannan use the same inverter output for 3nos 23watts CFL lamps.

Reply

M.MOORTHYKANNAN says:


DEAR SIR,

plese snd me 3 cfl inverter circuet diagram

Reply

shajan says:


i want inverter full circuit with chaeger

Reply

k t jayaprakash says:

October 22, 2011 at 10:52 pm

Dear sir,


20 of 30 03-04-2014 13:32

Please send me 3 cfl inverter circuit diagram

Thanking you,

Yours faithfully,

k.t.jayaprakash

Reply

PrataP says:


Can you send the exact circuit diagram and its components list to my mail… Thanks

Reply

seetharaman says:


hi patil around inr500 including transformer.

Reply

patil jaydeep vijay says:


how much amount required for this project except 12v battery.

Reply

seetharaman says:


Hi Nihar with a MOSFET transistor as their switch on resistance are quite low you can can use 12-0-12 transformer

the right choice. dont use 9-0-9 transformer with MOSFET. use recommended transistors for 9-0-9 transformer use.

Reply

nihar kanta says:


i have a 9-0-9 transformer from an old u.p.s .when i connect the transformer to the mosfet ,the mosfet becomes hot

at no load condition ,output is 280 volt,when battery voltage decreases it works properly.i changed the transformer

to 12-0-12 ,mosfets are not heating, the output is 220 volt .this is suitable.please tell me how can i use the 9-0-9

transformer safely . thanks in advance..

Reply

seetharaman says:

August 26, 2011 at 8:12 am

Hi Dev with 9-0-9 you will get an output of 270volts with fully charged battery, if this is acceptable you can

proceed.

Reply

dev says:

August 25, 2011 at 11:19 am

can i use primary 230v,secondary 9-0-9,10Amp transformer

Reply

user says:

August 22, 2011 at 2:05 pm

I in a quickly way have drawn the scheme. To whom it is interesting… To this address – of a photo, a file with

expansion lay- i will send on mail.http://www.photoshare.ru/photo7717869.html

Reply

seetharaman says:

August 21, 2011 at 8:41 am


21 of 30 03-04-2014 13:32

Hi Zafar it should be around 8 to 10Amps for 100watts with fully charged battery. with 12 volt 7AH battery it will

supply for 30mts.

Reply

zafar iftikhar says:

August 19, 2011 at 4:12 am

plz tell me that how much current the input 12 volt battery should produce?

Reply

Ankush says:

July 24, 2011 at 11:47 pm

i am not getting out of this circuit…..how shud i get the output??

Reply

Nosakhare Paul says:

July 3, 2011 at 12:29 am

Please i want to design a 1.5Kva inverter i can i go about it please i need ur help it’s for my final year project or

better still a 1.5kva ups

Reply

vipin says:

June 3, 2011 at 6:01 am

is this a working inverter’s circuit diagram

Reply

Seetharaman says:

May 2, 2011 at 8:49 am

This is a squarewave inverter

Reply

Rachit says:

May 2, 2011 at 1:13 am

also tell me how to categorise it , a sine wave inverter or some other .

Reply

Rachit says:

May 2, 2011 at 1:11 am

hi, i have made this circuit at the pcb board(holed).

the current is passing through IC but there isnt any output at secondry winding of transformer . even that ihave

checked the ckt. thrice and there isnt any mistake in connections . none of the joints is loose and each of them have

been soldered. also please let me know an alternate transformer (with its current and voltage ratings) that can be

used in same citcuit without alterations.please respond soon .also please send me its block diagram, would be really

helpfull.

Reply

Seetharaman says:

April 29, 2011 at 2:59 am

Hi Neo the battery voltage is switched on alternately to the primary of the transformer. The switching device is

MOSFET the drop across them is negligible hence full battery voltage will be available across primary winding. if

the transformer is 9 volt with 9 volt output will be 230volt square wave if it is 12 volt you will have 33% higher

voltage at the output. without load you will get around 300 volt square wave.

Reply

neo says:


22 of 30 03-04-2014 13:32

April 28, 2011 at 7:18 pm

Hi, I don’t know much about power electronics. I build this circuit with 9-0-9 v primary and 230 v secondary

(115-0-115)transformer.

I get output 240 v at secondary when I connect center tap of primary to 11 v and much higher when connected to 12

v. what is this relationship, is there a formula that I can use to work out what voltage center tap should be connected

for this type of transformer.

Thxs

Reply

Seetharaman says:

April 8, 2011 at 9:42 am

Hi Sankalp CD4047 is a CMOS IC iy can give an output of around 1mA which is not sufficient to drive the

transformer directly, hence you require transistor take care of the high current drive to the transformer. The

MOSFETs used are enhancement type they require bias to conduct. These devices require voltage drive ( around 2.5

to 4 volt)with very little current. cmos IC can take care of this.

Reply

Sankalp says:

April 7, 2011 at 9:05 am

Hey, I tried to build that circuit. It’s the same problem again. Getting output pulses from the CD4047 IC but

ultimately, getting nothing at the end…

and can anyone explain to me the working of the mosfets? I mean if i’m getting 23V AC from the 4047, Why not

just connect it to the transformer directly??

Reply

Jane says:

March 8, 2011 at 9:17 pm

anyone here can make a circuit 1.5V input and the output is 9V 1Ampere. Tnx a lot!

Reply

vani says:

March 8, 2011 at 5:50 am

how many types of inverter are there?

what is the use of mosfet in the inverter circuit and explain about its working?

Reply

rizwan says:


lp-100g i need data book

Reply

m.rizwan says:


iam a problem in inverter LP-100G 15HP chaingae(company) i wanna to compelet information about it plz reply

me as soon as possible…..

Reply

jojo says:


What is your exact problem, please clarify it.

Reply

neo says:


23 of 30 03-04-2014 13:32


Thxs VYSakh for ur reply, checked the mosfets pin connection, its not that.

I even checked mosfets on thier own with 12v input to gate with source grounded but got no output at the load at

drain ?

Reply

vysakh says:


check mosfet pin connections

Reply

neo says:


Hi, tried to build this circuit on breadboard, got output pulses from cd 4047 but not from mosfets. They are not

switching on and off, any clues

Reply

darren says:

October 27, 2010 at 10:10 am

Hi Seetharaman,tnx for ur quick responsed,i appreciate it so much,for this i gained more info on how your circuits

work!!tnx for the additonal websites,,now i am searching parts,first for the transformer for this project.tnx

GODBLESS.

Reply

Seetharaman says:

October 25, 2010 at 10:19 am

Hi Darren you have to take saturation voltage of the final power transistor at 5 amps say it is 2 volt you require a 12

– 2 = 10 volt transformer (10-0-10). if you use 12 volt you will get 10 to 15% less out put voltage, if that is ok you

can go ahead..

Reply

Seetharaman says:


Hi Darren you can use 2nos mosfets in parallel or even more. you may have to add a driver transistor in between.

Something similar to the following circuit

http://www.high-voltage-lab.com/72/500w-low-cost-12v-to-220v-inverter

http://electronics-diy.com/electronic_schematic.php?id=869

http://electronics-diy.com/electronic_schematic.php?id=899

Reply

darren says:

October 24, 2010 at 10:41 am

hi Seetharaman,definitely i can use more higher mosfet ryt?is it ok to use 6amp transformer?if not available

9-0-9,can i use 12-0-12 centertap x’former??..tnx.i need this circuit soon…GODBLESS

Reply

noufal p says:


i want to know more about this inverter…..pls forward me a block diagram and detailed writeup…

Reply

Seetharaman says:



24 of 30 03-04-2014 13:32

Hi Shashi One ceiling fan say 48″ it will consume 90watts, two CFL 18 watts so total requirement is 108watts say

inverter efficiency is 85%. Then the primary requirement is 108 / 0.8 = 135VA if the battery voltage is 12 then the

current requirement will be 11.25Amp. your battery capacity is 7AH so if draw 7amps it will supply for 1hr approx

so if you draw 11.25 amps the battery can supply for 35 minutes. hence your back up will be for appoximately

35minutes

Reply

Shashi says:


Plz give it’s Backup Details with 12v, 7Ah battery with using one ceiling fan & two cfl bulbs of 9 watts each.

Reply

seetharaman says:

August 26, 2010 at 1:38 am

Hi Pravpa you can use the standard step down transformers for stepping up no need for any special type.

Reply

pravpa says:

August 25, 2010 at 5:53 am

a normal transformer which we use for power supply can it be used reserved side or need spl. type transformer for

inverters, please explain..

Reply

sattv says:

August 24, 2010 at 1:02 pm

from the old uninterruptible power supply.

Reply

adnan says:

August 24, 2010 at 9:46 am

is the 9-0-9v 8.5amp transformer is best or the 17amp??

Reply

seetharaman says:

August 24, 2010 at 8:23 am

Hi Adnan 150 / 9 = 17amps total each 9 volt winding should be capable of 8.5amps

Reply

guhan says:

March 22, 2014 at 9:07 am

hi sir thanks for sharing the projects…i have done this project and it has worked…and to the visitors….use

9-0-9 tranformer and the ampere should be 2 and above….

Reply

adnan says:

August 23, 2010 at 10:04 am

9-0-9v at 150va tell me how much ampere of transformer will required?

Reply

vysakhan says:

August 15, 2010 at 6:32 pm

khan, its a sqre wave

max provide 100w load


25 of 30 03-04-2014 13:32

Reply

adnan says:


on 100 watts load how much backup time will the battery give?

Reply

adnan says:


9-0-9V,150VA transformer

how much ampere of transformer please tell me?

Reply

vimal says:

August 7, 2010 at 12:00 am

it is use for 2 fan & one tube light plz tell me

Reply

Eng.M.Yacir Jamil Khan says:

August 6, 2010 at 10:50 pm

Please tell me its output wave, sine,square or other ???

Reply

hasnat.zahoor says:

August 27, 2012 at 9:44 pm

hello

The output of this cct is square wave

Reply

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