>
>
>
> 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 ?


You can plug ANY notebook power adapter in to a standard off the shelf
inverter.

Aproperiate to run all of them from DC ? I don't want my car to be
> mess like my work room.


You didn't mention you just wanted to power a notebook computer.  If you had
said that, most people would have never replied after the first guy said "go
buy a $30 inverter at radio shack".

>
>
> > > Why do people fixate like this on THE ONE SOLUTION, when they have
> > > competent
> > > > people advising them that their solution is unworkable?
> > >
> > > This is what we call thinking wide open.Don't think of this approach
> > > as I don't know what I want - I do.The one solution you are talking
> > > about is going to be roots of another solution for the future.If I
> > > need a refrigrator at my car,what is going to happen ? Another bright
> > > solution will be coming up from competent people ? In time,My car is
> > > going to be full of competent peoples advises because I will be
> > > putting a special module for each thing I want to use.I appreciate
> > > your will to help - I really do but what kind of an investment
> > > philosophy is this ?
> >
> >
> >
> > More like thinking inside a tightly constrained box.  Sorry bud, but you
> > would be wise to just go pick up a power inverter and be done with
> it.  If
> > you're going to run a computer, get a  power supply designed for the
> > purpose.  It's going to be cheaper than anything you can build.  If you
> want
> > to run a computer, run it off DC.  "Everything" except motors run off DC
> > (some minor exceptions).  If you want a fridge, then use a cheap power
> > inverter.  Or just go to 7-11 when you need a nice cold drink.
>
> I just want to discuss something with people who knows.Eventually I
> will get what I want already.There is nothing wrong with trying
> something new.Don't personalize it.


Your solution (or idea of a solution) is like trying to parallel park an
RV.  Just not a good idea...

> What do you mean by investment philosphy?  Have you bothered to run a
> power
> > analysis to see how much power you need?  Are you going to need more
> > batteries?  More powerful alternator?  How about cabling.  Power losses?
> > EMI..
>
> What do you think ? If you read the posts above you would know that I
> still did not pick the embedded system that I am searching for up
> yet.You were doing just great till the EMI.But hey,don't you worry
> right? I am not going to ask any questions.You just take it easy.
>
>
> > Why not tap one of those power professors at your Uni for info on how to
> > build an inverter.  Google is a useful source too.  OR, you could just
> go
> > buy one of those cheap $30 units and reverse engineer it...
>
> Most of them are consisting of  2 or 3 layer pcb.It's hard to reverse
> it unless you are not familiar with what you are doing.(gaudy gotta
> try right ?)


Never seen a 3 layer board before.  Not hard to RE either.


> The world's your oyster, give it a crack.
>
> Are one of my fans or clients ? Have we met at BlackHAT ' 06 ?


Huh?  I have no idea who you are beyond this list.

But do yourself a favor and  start by not trying to design a power inverter,
but rather by reverse engineering one you can buy at Walmart, radio shack,
best buy, compusa, etc.

-- 

Shawn Wilton (b9 Systems)
http://b9Systems.com  <- New web page
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