12V DC to 220V AC Inverter Circuit

This is a quite simple DC to AC inverter that provides 220VAC when a 12VDC power source is provided. It can be used to power very light loads like night lamps and cordless telephones, but can be modified into a powerful inverter by adding more MOSFETs. It uses 2 power IRFZ44 MOSFETs for driving the output power and the 4047 IC as an astable multivibrator operating at a frequency of around 50 Hz.

The 10 and 11 pin outputs of the IC directly drive power MOSFETs that are used in push-pull configuration. The output transformer has a 9V-0-9V, 2 Amps on the secondary and 230V on the primary. Use suitable heat-sinks for MOSFETs.

Remember that this is not a sine-wave inverter, not even a modified one. It’s just a square-wave one so you can power only light bulbs, and small power tools that do not require a frequency with a sinusoidal wave form!

Schematic of the DC to AC Inverter Circuit

schematic of 12v to 220v inverter circuit


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  • gogutu

    Salut marian,pot folosi acest invertor pentru o pompa de recirculare la centrala termica?tank you

    • msgupta54gmail-com

      this is probably Romanian Language and the English Translation will be
      “Hello Marian, this inverter can be used for a recirculation pump to heating? Tank you”

    • kumar-rakesh-itgmail-com

      May I know in which language you have replied.

  • kumar-rakesh-itgmail-com

    This circuit will not work for heavy load. If we use heavy load then mosfet get hot and CD4047 will damage.

    Do you have any idea for protected the IC CD4047 in any type of load.

  • kumar-rakesh-itgmail-com


    In above where the pin 13 of IC4047?

    • kumar-rakesh-itgmail-com

      Thanks for your reply. I have made this circuit and it is working fine.
      My last questions can I use 12-0-12 volt transformer?
      How much maximum dc voltage I can apply on this circuit?

    • T.K.Hareendran

      Pin 13 is the “oscillator output” pin of CD4047 (not required in this project). The output frequency (at 50% duty cycle) at Q and Q outputs (Pin 10 &11) is determined
      by the timing components connected to pins 1-2-3. A frequency twice that of Q is available at the Oscillator Output. Wondering why you switched to this comment box instead of going through CD4047 datasheet available everywhere on internet. The same is also available at the bottom of this article too!

    • kumar-rakesh-itgmail-com

      I meant in above circuit where the pin 13 of IC4047?
      and what is the use of that pin.

  • TheDude

    Where’s the return path to the negative terminal of the 12V dc battery?

  • TheDude

    How do I connect the Varistor and the 12V battery (I’m using a battery), it only shows where the positive side is?

  • naresh purohit

    sir i tested your circuit on bread board their was some humming noise from the circuit , as well a lot of heating due to which breadboard started melting .
    also a sound of beep was their . why it is so ?? can you guided me???

  • sharik

    i am just making a project using yours circuit its a smart power generation i just want few guidience

  • Maksud

    please information me how can i will make dc celling fan 48″.
    i don’t know about circuit and copper motor

  • Paul Richard

    Ok but i would like to know if 600 watts inverter be enough to power 32″ LED TV, one standing fan, two tubelights, music system, phone charging system??

  • Paul

    Can 600 watts inverter be changed to 3 kilowatts??


      Not easily you will need at least 48 volt batteries and the transformer will be larger than an old type oil cooled welding machine that can supply welding current for 4millimeter welding sticks!!!The transistors or mosfets will have to be BIG and about thirty per side to be safe!! Basically the inverter will be the same working but you will have to have proper protection circuits as the basic circuit will not last. I would do the phase splitting not with that little IC but a special transformer that itself will be quite big and there I would employ a driver of about 20 watts to drive the bases of the output devices. Remember that it will consume more power to drive itself than what we normally will assume.

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