Power Brick question

Hi Everyone

New here and all. Just want to know how Notebook makers manage to skweeze so much power into such a small a small piece of plastic? And it is sealed too. No holes or anything. No cooling at all.

Wow, they must be sooo clever.

 

I ask this question because I wanna build me one of them.

A really strong one in a sealed plastic box.

Anyone know what parts I need to buy?

Thanks
Head

 

Anyone know??

Please answer ASAP. I wanna build something tonight

I have lots of bits and pieces of striped stuf.

Thanks
Head

 

well building one as small as theirs is tricky. and if you build it chances are you will not buld in a short out detector, load limiters or thermal protectors.

now for the basics:

you will need a trnasformer to step down the 120V AC to about 36V AC then a rectifier to convert to DC, some good capacitors between the outputs to stabalize somewhat

at that point you have semi clean 36V DC power which is WAY too much for your laptop so you use a voltage regulator IC or something similar to drop your voltage to the needed voltage and then idealy a current limiter to stop the amperage from going too high if your IC does not support it. then off to some more capacitors to filter your final output and your set.

I build these al. the times for vehicle mounts and the occasional custom app I need. but be warned, they do NOT have all the safety circs you will find in a comercial model unless you sped alot of design work and make a much more complex board.

unless you have done this before DONT RUSH and do youe homework on DC power supply circuits.

 

Hi there crazycanuk

A capasitor is like a small battery...right.

Thanks
Head

 

Now I am thinking..

Damn, I wish I knew how electrons worked. I feel stupid.

I have this great idea...but kant express it.

Thanks
Head

 

Hi Everyone

I wanna build me a Power Supply. Like the ones that a Laptop uses.

Mine must be strong and also in plastic. From what I understand it is quite hard to do. And I need to know about Electrons

Anybody here know anything about Electrons??

Thanks
Head

 

Kind of, they have to be charged in the circuit to store energy but, they do other things as well.

Why do you want to build this anyway? I think you may be getting in over your head, like crazycanuk said, you should do some homework before trying to build it, especially because you're working with potentially dangerous currents.

 

Electrons are the negative particle of an atom. They orbit around the positively charged nucleus of an atom. Electrons allow for atoms to bond together and form molecules either from sharing electrons between atoms (covalent bonds) or by transferring electrons (ionic bonds). When electrons are "free" and when they move around they cause an electric current. Electrons in metals are considered to be "free" which is why metals are good conductors. In a similar way, current flows through electrolyte solutions because of the free ions in the solution behave in a similar way to free electrons in metal.

Maybe that helps, perhaps you could be more specific on what you want to know about electrons.

 

If you want to build a power supply, your best bet is to get an existing one and make a new shell for it. To actually make one, you'll need a degree in Electrical Engineering, and given that you don't know what an electron is, that's quite a ways off.

 

imo if you have to ask what a capacitor is I am pretty sure your going to need to do quite a bit of homework.. it seems that you might be trying to do something quite out of league.. you might after some hw get a older laptop power supply and modify it for your needs

 

These things are not simple to build. And if you don't get it right, there's a risk that you'll fry whatever laptop you hook it up to.

Considering you don't even know what an electron is, your odds of being able to build a working power brick are pretty much zero.

 

OK im going to come back here ... OP if you dont know BASIC circuit desgn nor components ..... dont try to build one. the high voltage side is DANGEROUS. electicity is NOT always your friend and there is enough Amperage in there to kill you which is why the voltage and amperage is stepped down so far and the " brick " is sealed up nicely.

 

May I ask why you want to built one in the first place?

 

He doesn't.

He's making posts every 2 to 30 minutes - most likely to inflate post count, so he can eventually create new threads. This is the behavior pattern that spammers use.

But in all fairness, he may not be a spammer account. He may just be insane.

 

Errr yeah, I am pretty sure I know a spammer's post behavior after banning over 300 of them. As you can see, he has no issues creating new threads.