>> I have an EE major and MBA,If everything goes ok I will be finishing
> > my Ph.D till the end of 2007.Although you are right,my field is not
> > power systems.
>
>
> Uh huh... I know more PhDs that couldn't engineer their way from a paper
> bag.  Amazing how easy it is to get an advanced degree now days. Not to
> offend anyone here with an advanced degree... :-P

I know people who are better than me at the list,also they might be
self-educated,I'm fine with it,np.

Always respect to knowledge

> There are lots of reasons why I seem to be stucked on an inverter.
>
>
> Lack of knowledge and practicality is #1.

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.

> 1)As I said,all of the power inverters (ok,relax,lets just say most of
> > em) has power-cut feature.This is a good feature to have.Why should I
> > bother to build an apart module while I am able to handle most of
> > things in one design.
>
>
> "Power-cut" as you call it, has nothing to do with the inverter.  It's just
> a feature.  You can build that feature in to anything you want.  Run a line
> from the battery to an ADC on a uC, and cut the enable to a high current
> MOSFET and voila, you have "power-cut".  There are many commercial products
> available that do this.
>
> 2)I may be running other stuff (like a printer,digital satellite
> > reciever[for special purpose] or a wireless booster)
>
>
> ... If you need a printer, may I recommend an HP 460C.  It's portable, runs
> off 18V (DC), and has a battery pack.  No power inverter required!  Not much
> room in an EVO for a DS receiver, but hey, gaudy is almost back in.

A DS reciever with its LNB is maximum 3L's volume.You will get some
trouble having the broadcast neatly.

> > 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.

> 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 ?)


> The world's your oyster, give it a crack.

Are one of my fans or clients ? Have we met at BlackHAT ' 06 ?
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