CD4047 inverter

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Simple 100W inverter circuit admin August - 5 - 2010 193 Comments

Description. Here is the circuit diagram diagram of a simple 100 watt inverter inverter using IC CD4047 CD4047 and MOSFET 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 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 respective MOSFETs. MOSFETs. When pin 10 is high Q1 conducts conducts and current current flows through the upper half of the transformer transformer primary primary which accounts accounts for the positive positive half of the output AC voltage. When pin 11 is high Q2 conducts conducts and current 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.

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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, secondary, 150VA 150VA transformer . Do not expect much from this circuit. The is very simple one suitable for low grade applications.

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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, secondary, 150VA 150VA transformer . Do not expect much from this circuit. The is very simple one suitable for low grade applications.

You may also like: PWM inverter circuit 60W inverter using transistors 100 Watt inverter circuit How to make an Inverter- Simple 40 Watt Inverter

We recommend: Simple Lamp Dimmer/ Fan Regulator Equus 3320 Auto-Ranging Digital Multimeter Voltage splitter using Op-Amp Triangular waveform using Schmitt Trigger 5V transformer less power supply

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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: 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: 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. 85v. Please sir tell me the solution. Reply Seetharaman says: March 27, 2014 at 11:36 pm

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Simple 100W inverter circuit - Electronic Circuits and Diagram-Electr...

http://www.circuitstoday.com/simple-100w-inverter-circuit

Hi check the quality of your inverter tra nsformer 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: February 8, 2014 at 2:33 am what is capacitor c2 rating? Reply Akeem says: February 7, 2014 at 1:44 am i want you to specify me the type of I R driver cct to trigger Mosfet power cct in order to give me 5KVA single phase inverter Thanks Reply Nitu says: February 1, 2014 at 6:17 am Can i use 12v transformer Reply Muthu says: February 16, 2014 at 8:30 am 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:

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January 24, 2014 at 1:15 am what type of capacitor c2 are my going to used and the transformer details. Reply okoye says: February 1, 2014 at 5:37 am

what type of capacitor is c2?and transformer details? Reply pranjal says: January 23, 2014 at 7:59 am I am unable to find IC CD 4047 in eagle software Reply pranjal says: January 23, 2014 at 7:56 am 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: January 23, 2014 at 5:08 am sir what transformer should i use. Reply Seetharaman says: January 26, 2014 at 9:21 am

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: December 24, 2013 at 2:43 am sir circuit was working………i want internal structure of 4047 ic ………..plz sir…. Reply pradeep says: December 14, 2013 at 3:34 am 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 .

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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 f or 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: October 8, 2013 at 8:58 am

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 Dia gram 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

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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 inverte r 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: October 28, 2013 at 7:34 am

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?

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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: February 23, 2013 at 11:40 am hello sir i need 250 watt inverter plz help meee. Reply sanaullah says: February 16, 2013 at 11:15 pm it does not work!!!!!!!!!! Reply wasimakram says: February 13, 2013 at 7:39 am Hello sir I want to make a helecoptor with remote please sent me thank u Reply WAKHEEL says: February 10, 2013 at 5:38 pm Hello. plz i need of components equivalent DATA.

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Reply WAKHEEL says: February 10, 2013 at 5:36 pm Plz . I need component equivalent data Reply Azeez says: February 9, 2013 at 5:04 am Hello sir i need 200w inverter circuit…so can u help me? Reply deva prakasam says: February 1, 2013 at 8:09 am 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: January 15, 2013 at 1:11 am 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 7a h is used or increase the battery level…. Reply stephin says: December 5, 2012 at 11:41 pm 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: December 6, 2012 at 5:56 am

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

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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: December 5, 2012 at 11:28 pm 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: November 5, 2012 at 1:53 am 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: October 14, 2012 at 8:03 am HI SIR I AM INTERESTED TO 100W INVERTER INSTERTED Reply mahi says: October 11, 2012 at 4:59 am Hello sir, I also have 12-0-12v/230, 7A transformer. Will I use it to this circuit? plz help Reply rohin says: December 6, 2012 at 5:58 am

yes you can use it. Reply kranthi says: October 2, 2012 at 4:02 am 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: December 6, 2012 at 6:01 am

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: September 12, 2012 at 9:48 am

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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: September 2, 2012 at 11:32 pm SIR, I HAVE A 35AH BATTERY,CAN REPLACE THIS WITH THE 7AH BATTERY OF COMPUTER UPS? Reply rohin says: December 6, 2012 at 6:06 am

you can replace it with no problem. wires should be 10 mm or higher Reply jafar says: September 2, 2012 at 11:23 pm 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 al l 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

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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 Nithin Pradeep says: 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 ?

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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 Nithin Pradeep says: July 4, 2012 at 6:45 am Can you please tell the current rating of the transformer……. Reply Nithin Pradeep says: 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 Nithin Pradeep says: 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 fa ce 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

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Nithin Pradeep says: June 30, 2012 at 3:21 am

what about the Duration of load(time) What is the function of the preset Reply Nithin Pradeep says: 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: August 7, 2012 at 9:18 am

yes you can Reply markut says: August 7, 2012 at 9:30 am 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..

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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

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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: November 12, 2012 at 7:53 am

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…

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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 ?

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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: February 18, 2012 at 5:05 am 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: February 17, 2012 at 8:58 am 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: February 11, 2012 at 3:55 am This circuit is fine. But may we use it to drive 200W load by using 220VA transformer? Reply Suman says: February 11, 2012 at 3:53 am This circuit is ok. But may we use it for 200W load with a 220VA transformer? Your kind help needed. Reply Udhaya says: January 31, 2012 at 4:16 am 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

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inverter. thanks in advance Reply raja says: January 29, 2012 at 3:34 am 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: January 5, 2012 at 8:42 am 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: December 25, 2011 at 3:00 pm Hi Haidar the harmonics are taken c are by the output filter capacitor C4 you can i ncrease 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: December 25, 2011 at 8:13 am hi seetharaman, this circuit can run tv? and how to reduce harmonic?

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Reply seetharaman says: December 20, 2011 at 7:02 am 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: December 19, 2011 at 7:07 pm 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: December 17, 2011 at 1:13 am hi sir,can i use transformer 12-0-12/230,75VA? hence what wattage i will get? Reply azrin says: December 15, 2011 at 6:50 am one more question.. what transformer that u used ? and can i use 12v-0-12v transformer ? Reply azrin says: December 15, 2011 at 6:44 am can this inverter turn on a TV,amplifier or fans ?? Reply seetharaman says: December 14, 2011 at 11:57 am Hi Kannan use the same inverter output for 3nos 23watts CFL lamps. Reply M.MOORTHYKANNAN says: December 14, 2011 at 2:00 am DEAR SIR, plese snd me 3 cfl inverter circuet diagram Reply shajan says: October 23, 2011 at 8:36 am i want inverter full circuit with chaeger Reply k t jayaprakash says: October 22, 2011 at 10:52 pm Dear sir,

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Please send me 3 cfl inverter circuit diagram Thanking you, Yours faithfully, k.t.jayaprakash Reply PrataP says: October 15, 2011 at 3:14 am Can you send the exact circuit diagram and its components list to my mail… Thanks Reply seetharaman says: September 21, 2011 at 11:58 am hi patil around inr500 including transformer. Reply patil jaydeep vijay says: September 21, 2011 at 5:10 am how much amount required for this project except 12v battery. Reply seetharaman says: September 12, 2011 at 6:09 pm 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: September 9, 2011 at 7:02 am i have a 9-0-9 transformer from a n 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

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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:

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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: February 20, 2011 at 6:50 am lp-100g i need data book Reply m.rizwan says: February 20, 2011 at 5:22 am 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: February 20, 2011 at 6:49 pm What is your exact problem, please clarify it. Reply neo says:

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February 11, 2011 at 12:14 am 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: February 10, 2011 at 2:43 am check mosfet pin connections Reply neo says: February 9, 2011 at 5:04 pm Hi, tried to build this circuit on breadboard, got output pulses from cd 4047 but not f rom 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: October 25, 2010 at 9:25 am 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: October 13, 2010 at 5:43 am i want to know more about this inverter…..pls forward me a block diagram and detailed writeup… Reply Seetharaman says: September 29, 2010 at 1:41 am

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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: September 28, 2010 at 10:01 am 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

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Reply adnan says: August 7, 2010 at 9:21 am on 100 watts load how much backup time will the battery give? Reply adnan says: August 7, 2010 at 9:18 am 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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