# 12v dc to 220v ac inverter circuit diagram.

1. ## Re: 12v dc to 220v ac inverter circuit diagram.

Hi Analy,
Many people built the project and it worked fine except it has a square-wave output, it does not have voltage regulation and it does not turn itself off when the battery charge becomes low.
1) Use a high capacity battery.
2) Measure the outputs of the CD4047 to see that there is a 50Hz or 60Hz square-wave with a peak voltage that is the supply voltage.
3) Measure the outputs of the LM358 opamps to see the square-wave with a peak of a few volts.
4) Measure the emitters of the 2SC1061 transistors and the transistors Q3 and Q4 to see the square-wave but with about 2.5V and 1.5V peak.
5) Measure the collectors of the output transistors to see the square-wave that is about 23V p-p.

Your schematic is old. A couple of changes make the circuit more reliable. See my modified schematic.

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2. ## 12v dc to 220v ac inverter circuit diagram.

i already buy 12-0-12 transformer and it is only 10 Ampere. it is ok to use it in this circuit?because I've seen that in your modified circuit diagram the transformer primary is 10-0-10.

thank you

3. ## 12v dc to 220v ac inverter circuit diagram.

Assuming that your transformer is 12V-0-12V to 240V:
1) If your battery is fully charged at 13.2V and there is no load then the output of the inverter with a 12V-0-12V transformer will be about 222V.

2) If your battery is fully charged at 13.2V and there is a load of 120W (the max rating of your little transformer) then the output voltage will be 188V.

3) When the battery voltage drops to 11.2V and there is a load of 100W then the output voltage is 170V.

The output is a square-wave so you cannot measure its voltage on a simple voltmeter.

4. ## Re: 12v dc to 220v ac inverter circuit diagram.

Plz help me i also need of this circuit

5. ## Re: inverter circuit diagram

[awio june]I want a 12v dc to 220v ac inverter circuit diagram.please send me the simplest circuit diagram to make it practically for home appliances.
The input should be 12v dc and the output should be 220v ac,50 Hz sine wave.
Send me the circuit diagram as soon as possible.[/QUOTE]

6. ## Re: 12v dc to 220v ac inverter circuit diagram.

12V Sine wave inverter

7. ## Re: 12v dc to 220v ac inverter circuit diagram.

50W 12>220 sine wave. I did not do but other people write that works.
50W 12>220 sine wave.
Another converter, on mega8 -
http://www.remexpert.com/ipb/index.p...&showentry=129
and similar, based on tiny13
http://www.remexpert.com/ipb/index.p...&showentry=130
Output signal from tiny13 converter -

8. ## Re: 12v dc to 220v ac inverter circuit diagram.

Originally Posted by Audioguru
Hi Analy,
Many people built the project and it worked fine except it has a square-wave output, it does not have voltage regulation and it does not turn itself off when the battery charge becomes low.
1) Use a high capacity battery.
2) Measure the outputs of the CD4047 to see that there is a 50Hz or 60Hz square-wave with a peak voltage that is the supply voltage.
3) Measure the outputs of the LM358 opamps to see the square-wave with a peak of a few volts.
4) Measure the emitters of the 2SC1061 transistors and the transistors Q3 and Q4 to see the square-wave but with about 2.5V and 1.5V peak.
5) Measure the collectors of the output transistors to see the square-wave that is about 23V p-p.

Your schematic is old. A couple of changes make the circuit more reliable. See my modified schematic.
can you post your modified schematics on the 500w inverter thanks
and kindly indicate what is the transformer requirements for the circuit,,,,thanks ^_^

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9. ## Re: 12v dc to 220v ac inverter circuit diagram.

Originally Posted by useless018
can you post your modified schematics on the 500w inverter
It is in post #41.
kindly indicate what is the transformer requirements for the circuit
It is on the schematic: 10V-0-10V (20V center-tapped) to whatever output voltage you need. It will be huge, heavy and expensive.

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10. ## Re: 12v dc to 220v ac inverter circuit diagram.

Here are some of the simplest inverter circuits that you can check out. The working of the circuits are clearly given there..
-Simple low power Inverter Circuit (12V DC to 230V or 110V AC)
-Inverter circuit using 555 timer IC 12V to 220V
-Simple PWM inverter circuit diagram using PWM chip SG3524

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