15 20W 12-220V simple inverter project



The output of this inverter project is square wave at 2.4kohm load is about 90ma max


Load  must not include equipments with motor that operates in purely sinewave source of 50 or 60 Hz frequency .The circuit is good in lighting like cfls and incandescent lamps. but ensure first that the load must not exceed the 25W for proper operation.


Resistor is rated 5W 100ohm

transformer is 4A  220V to 12V-0-12V

for more protection, provide 2A fuse and a switch in series to the battery







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15 comments:

  1. amitJanuary 9, 2011 at 8:03 AM

    Thanks for nice and very simple inverter. now i want to know if use cfl bulb then is it flicking or light up normally ?

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  2. DH-gmJanuary 10, 2011 at 3:13 PM

    i tried it with CFL and it worked just fine. But i noticed that the lamp is not as bright as using 220 main source. It could be due to the rms voltage value is much lower than the 220V main.

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  3. UnknownFebruary 12, 2011 at 8:31 PM

    CAN IT LIGHT UP A 11WATT FLUROCENT POPRELY WITH FULL POWER.LIGHT WILLB BRIGHTER OR NOT???

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  4. DH-gmFebruary 17, 2011 at 3:47 PM

    this inverter design is one of the simplest, it can light up cfl but we cant expect that the emitted light is its full capacity because the output voltage of this inverter drops when loaded. I tried it also with cfl and encountered same problem.But the good thing is i lighted up a cfl without using the 220V main.

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  5. zaeem ahmadApril 25, 2011 at 4:20 AM

    DEAR SIR,
    I AM NEW IN ELECTRONICS,PLESE TELL ME WHICH TYPE OF TRANSISTORS ARE THIS, ARE THEY NPN OR PNP.
    SIR ALSO TELL ME THAT CAN I USE BOTH TRANSISTOR OF SAME TYPE FOR THIS CIRCUIT

    ReplyDelete
  6. DH-gmApril 25, 2011 at 7:33 AM

    zaeem
    it is NPN power transistor. You can use the same NPN transistor but be sure that the type of transistor you are using is atleast 4A current capacity.

    ReplyDelete
  7. zaeem ahmadApril 26, 2011 at 3:55 AM

    dear sir,
    sir kindly tell me can i use transformer without center tapped,
    i mean if i connect 12 volt step down transformer in reverse, is this circuit works?

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  8. DH-gmApril 28, 2011 at 6:47 AM

    I never tried using two transformer..But based on what i know, the circuit will not work using that configuration. It should be only one transformer with center tap for the circuit to work.

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  9. Kamal PokharelFebruary 22, 2012 at 11:31 PM

    Can u utilize that transformer for dual purpose i.e can we use that transfor for rectification purpose to charge the battery and inverter when needed

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  10. DH-gmFebruary 23, 2012 at 2:27 PM

    Its a good idea that you use the transformer for inverter and charging at the same time. Ill be honest with, I never tried that idea but i believe it is possible. Try using transformer with multi tap, let say primary voltage rating is 110V or 220V and secondary voltage rating +15V, +12V, 0V, -12V (multi-tap). use the 15V tap for charging

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  11. Suman MallickFebruary 28, 2012 at 10:24 AM

    Just few minutes ago..I made the circuit..
    It works..But the CFL(Phillips 20W) is flicking ..
    and the voltage at 12-0-12 transformer end is showing 9 Volts..
    I am using Exide 12V 100 AH, 2 Amps Fuse & 220/12-0-12 ,3A transformer.
    Please advice how to avoid flicking!
    Thanks in Advance.

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  12. Student E knowledgeApril 5, 2012 at 10:09 AM

    please help me for making 80watt type inverter circuit

    ReplyDelete
  13. James - nyc lens cleaningAugust 4, 2012 at 1:39 AM

    This is a nice project for a simple inverter. Can you add some photos on it? I will really appreciate it. Thanks!

    ReplyDelete
  14. AnonymousSeptember 9, 2012 at 11:16 AM

    what is the ampere hour of 12volt lead acid
    battery?

    ReplyDelete
  15. UnknownApril 21, 2013 at 5:20 AM

    whwt is the working of this project....plz i need.........

    ReplyDelete

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