Yigit Turgut wrote:

> Which part you don't understand ?
> 
> 1)What if I want to use 2 Laptops in my car with different voltage
> requirements ? Also a 20" lcd with different voltage ?
> 2)What if I decide to use a wireless router instead of using the
> mini-pci wireless as an ap ?
> 
> Aproperiate to run all of them from DC ? I don't want my car to be
> mess like my work room.

You started out asking about how to build an inverter to run one computer.
The thing (at least here, and probably on all lists with qualified people)
is that the responses are as good as the information you give, on average.
You apparently didn't describe your complete scenario: that you are
thinking about running a whole host of devices, from a general household
fridge to a wireless AP, from your inverter. 

You might have gotten different answers if you had taken the time to
explain your problem better. Your first message was really too short on
information:

> I need to convert12VDC source to 220VAC.
> 
> I am not sure which path to follow.

This is not enough :)  But even after much of the info came over, Herbert's
opinion is probably shared by most: a 1 kW inverter is not really that easy
to design. 

So you probably should start researching inverters. You probably find
circuits for lower power devices that help you understand how they work.
You also can find application notes from various semiconductor
manufacturers, maybe even some that address inverters in your power range.
Then you can start designing your own. 

If you have any problems on this path, ask questions -- clear questions
about concrete problems. Usually there are people who know the answer or
can point you to a possible one and are willing to help. But something like
the OP of this thread is not enough for receiving good answers. You ask
generic questions, you get generic answers (like "buy an inverter"). You
ask specific questions, you get specific answers (like "use part X for that
purpose" -- but the purpose needs to be specified a bit better than "an
inverter").

Gerhard

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