/diy/ - Do It Yourself

[Anonymous No.1658015]

My monitor's powerbrick is giving up after many years and I'm looking for a replacement. This should be compatible since it's the same part number but there's something I don't understand.

My original powerbrick's label:

input: 100-240v 50/60hz 1.0 A max
output: 19v 1.7A

And the replacement is pic related.
The output checks out but the input in the replacement is 0.9A and not 1.0A. What does this mean? Will it work? Where I can learn to read these things and know what they mean?

[Anonymous No.1658019]

holly shit
it's just max current it means nothing
>Where I can learn to read these things and know what they mean?
here https://lmgtfy.com/?q=learn+about+electronics or go to a specialized school

[Anonymous No.1658020]

>>1658015
It just means it is more efficient than the old one. Output current is all that matters here, you need 19V and 1.7A, and this can give you that.

[Anonymous No.1658023]

>>1658020
>It just means it is more efficient than the old one.
No it fucking doesn't. Don't try to post about electricity if you don't know shit like all the retards on this board do.

[Anonymous No.1658024]

>>1658019
>>1658020
Ah so it means that it only takes 0.9A to produce 1.7A output while the old one took 1.0A to produce the same?

[Anonymous No.1658026]

>>1658024
correct

[Anonymous No.1658027]

>>1658026
No you fucking retard.
>>1658024
It's max current when you first connect it because of capacitors.

[Anonymous No.1658028]

>>1658023
Uses less current to produce the same output, please explain how that is not more efficient.

[Anonymous No.1658029]

>>1658027
>It's max current when you first connect it because of capacitors.

So it means that it will give only 1.0A before the capacitor charges?

[Anonymous No.1658030]

>>1658027
You have anger issues.

[Anonymous No.1658034]

>>1658023
wow , you are just retarded

if it is drawing " less current " to produced the same output :
that means you stupid fuck , that is has less Ohms and thereby LESS impedance which means that it has overcome the resistive force of the coils that make up the transformer it has a better " efficiency curve" when it gets warm.

so it does the same the job with less making it more efficient.

god damn , YOU are just fucking stupid

[Anonymous No.1658035]

>>1658034
You are a fucking retard holly shit.
You don't even know how capacitors work you fucking retard.
You don't even understand what current it is you fucking retard.
You think it's the operational current you fucking retard.
You don't even know how these power supplies work you fucking retard.

[Anonymous No.1658038]

>>1658035
you dumb mother fucker
there are no caps in that power supply
it has a rectifier in it , which are diodes

so shut the fuck up you shitty little troll

[Anonymous No.1658041]

>>1658034
https://www.youtube.com/watch?v=cX4q0e124C4
Here but I'm sure you are too retarded to understand it. Especially where the current comes from.
>>1658038
epic troll
Too bad I can't tell if you are actually serious or a troll on this board.

[Anonymous No.1658045]

>>1658041
holy shit you don't even understand basic shit
what the fuck are you posting something that has nothing to do with what OP is asking ?
you stupid little fuck ,
a switching power supply IS NOT what OP has , you STUPID FUCKING IDIOT

what OP has posted is called a full wave rectified power supply
you are posting shit that has nothing to with with OPs question or his post.
go away ,you are just fucking stupid

[Anonymous No.1658047]

>>1658045
They haven't made full wave rectified plug-in supplies in a long time.
How do you think it knows which legs to use for 110 or 220 to put out 19V unless there is at least a regulator circuit.
Even my small phone charger is a miniaturized switching power supply.

[Anonymous No.1658049]

>>1658015
Input voltage/cycles and output voltage/current are important. You can go with a higher output. I did that with my Lenovo Yoga.
Just be careful with chinese power supplies. There are cheap ones that are utter shit.
Suggest you also try the support forums and read what other anons have bought.

[Anonymous No.1658050]

>>1658049
I meant higher output max current. Output voltage is critical.

[Anonymous No.1658052]

https://www.sunpower-uk.com/glossary/what-is-inrush-current/
Here read this

>>1658045
>a switching power supply IS NOT what OP has
you are a fucking retard
don't ever post about electricity you fucking retard
even if you are a troll you are a fucking retard
go troll reddit you retarded troll

[Anonymous No.1658170]

>>1658045
>a switching power supply IS NOT what OP has , you STUPID FUCKING IDIOT
>what OP has posted is called a full wave rectified power supply
If this were true, the supply would be fucking huge. OP has a switch mode power supply, hence it's small size.

But please, keep Rustling your Jimmies. It's mellifluous.

[Anonymous No.1658172]

it won't matter. My monitor wants 4.6 volts or something retarded and I got a 5 volt adapter. Works fine.

It's only going to draw the amps it wants.

[Anonymous No.1658177]

>>1658170
the adaptor could be 15amps it doesn't matter. It will only take 1 amp and the rest will fly off into space. Fuck you guys are retarded.

Amps means "how fast" the electricity goes, you could plug a phone into a 5 amp charger, the amps just tell the phone how fast to charge it. Most adaptors aren't going to fry something if the volts and amps are with 1.0 of each other.

Fucking retarded smart fags.

[Anonymous No.1658202]

>>1658177
What are you even arguing now?

[Anonymous No.1658209]

>>1658170
it's probably a retarded troll
>>1658177
god you are retarded I hope you are a troll

[Anonymous No.1658328]

>>1658209
Must be troll. Has no concept of electric stuff.

[Anonymous No.1658330]

>>1658177
>Amps means "how fast" the electricity goes

[Anonymous No.1658339]

>>1658202
>>1658209
>>1658330
When it comes to appliances, voltage is all the matters. Too many amps doesn't matter as the appliance will only draw how many amps it wants. Your cellphone uses 1.5 amps, but you can plug it into something that has 100 amps, it doesn't matter because it will only draw 1 amp and send the rest of the amps back. Confirmed smart retards.

[Anonymous No.1658354]

>>1658339
no one asked that you retarded troll
we are not questioning that it's wrong autismo

[Anonymous No.1658357]

>>1658339
also here is the literal definition of an amp.

>Amp – an ampere is the unit for measuring electricity. The accepted standard unit used for measuring how fast an electric current flows is an example of an ampere.

The difference between voltage and amps. Voltage is volume, amps is speed. I can't believe you don't know this, it's very basic. Thats why you can plug a usb port straight into the wall. The wall has 20 amps, the usb port has a resistor in it that only allows 3-5 volts, and IT DRAWS 1-3 amps, where do the rest of the amps go? Back into the wall. The usb charging isn't drawing voltage, the wall is pushing the voltage into the device and the device blocks the extra volts, it's not blocking the extra amps, it's just taking the volts it wants at the amp speed. Volume vs speed. DURPY DURPPY DURR.

tl;dr if op needs a new power supply for his monitor and it has the same voltage that's literally all that matters, and it doesn't even need to be the same because appliances compensate for power surges to a degree.

So he need 5 volts and 1.5 amps, but his charger is 6 volts and 3.0 amps, it won't matter because the device will only draw 1.5 amps, the amps don't push through things, the voltage does.

[Anonymous No.1658361]

>>1658357
you are trying too hard autismo

[Anonymous No.1658362]

>>1658361
>lel I trolled you by not knowing how basic appliances work.
>see the tap spraying water, it's the same as a fire hose dripping. Amps don't matter lololol.

Fuck off retarded fag.


>my usb 1.0 will charge my phone as fast as a 3.0 port because same voltage, doesn't matter
>I'm brain damaged.

[Anonymous No.1658364]

>>1658362
why do you still keep trying autismo
actually it would be funnier if you aren't a troll

[Anonymous No.1658365]

>>1658364
>op asks if his new power supply will work
>some guy says yes because amps don't matter
>10 posts by fucking einsteins arguing about amps
>try to use really basic explanations why too many amps don't matter
>dumbass fag still doesn't get it

You must be really smart.

>>1658020
thread should have ended here.

[Anonymous No.1658367]

>>1658365
please tell me you are serious
this is super retarded

[Anonymous No.1658370]

>>1658367
One more time since you are actually super retarded.

If you are thirsty and you take a sip from a lake it doesn't mean you drake the whole lake because you touched it with your lips because it was only a sip.

Voltages push, amps pull. The device doesn't care about amps, ever.

[Anonymous No.1658372]

>>1658370
please, have more anecdotes?

[Anonymous No.1658373]

>>1658372
How about you explain why I'm wrong. You can only have too little amps, not too many. Can you fit a swimming pool in a drinking glass? No. Are you still going to keep pretending to be smart because your meme degree doesn't let you understand grade 8 science?

[Anonymous No.1658375]

>>1658370
>Voltages push, amps pull.

while you are right and he's a troll, this kind of nonsense doesn't make you look too good. and don't try to explain how amps pull, because they just don't.

[Anonymous No.1658409]

>>1658177
You quoted the wrong post retard.
>>1658357
>the wall has 20 amps
At 120vac or 240...depends on country
>the USB has a resistor to allow 3-5 volts
Nope.
>and IT DRAWS 1-3 amps
Nope.
>where do the rest of the amps go
Up your ass because this doesn't happen.
>The usb charging isn't drawing voltage, the wall is pushing the voltage into the device and the device blocks the extra volts, it's not blocking the extra amps, it's just taking the volts it wants at the amp speed. Volume vs speed.

The charger doesn't block fuck all it transforms first. Then it draws according to impedence or resistance of the switching circuit and the load. Amps are not speed. It's how much charge per second, or charge rate. Not how many fucking miles it can go over time you stupid twit. Voltage is energy per unit of charge. May as well make that your "speed" cause your too dumb to wiki.

Citation:
The International System of Units defines the ampere in terms of other base units by measuring the electromagnetic force between electrical conductors carrying electric current. The earlierCGS measurement systemhad two different definitions of current, one essentially the same as the SI's and the other usingelectric chargeas the base unit, with the unit of charge defined by measuring the force between two charged metal plates. The ampere was then defined as onecoulombof charge per second.[7]In SI, the unit of charge, the coulomb, is defined as the charge carried by one ampere during one second.

>the amps don't push through things, the voltage does.

Amps can push through things. It's called an inductive element. Pushes amps through airgaps if you let it.

> DURPY DURPPY DURR.
That's you. That's how you talk.

[Anonymous No.1658459]

>>1658409
FAGGOT

[Anonymous No.1658463]

>>1658028
Because it means it uses a higher voltage.

[Anonymous No.1658471]

>>1658023
>Don't try to post about electricity if you don't know shit like all the retards on this board do.

says the obvious retard

[Anonymous No.1658478]

>>1658471
you are a fucking retard

[Anonymous No.1658488]

>>1658478

[Anonymous No.1658498]

>>1658459
Exactly what I wanted.
C'mon is that all you got?

[Anonymous No.1658595]

>>1658339
>and send the rest of the amps back

Fucking hell.. Guess i've been trolled

[Anonymous No.1658664]

This thread is fucking gold.

[Anonymous No.1658755]

>>1658409
>Amps are not speed
To be precise, they are. A=C.s, it is a unit of how many Coulombs are transfered per second. Since Coulomb is constant, the less time it takes to transfer same number of coulombs the greater the current.
But since electric current is literary flow of coulombs, it's synonymous to flowrate in liquid. Also most of the equations (apart from parts of bernoulli) can be used for electric current.
I can't belive someone can be so dense to think that current can pull. Voltage is equivalet to "pressure", it can only push

[Anonymous No.1658841]

>>1658755
>A=C.s, it is a unit of how many Coulombs are transfered per second
That is not a speed. That is a rate of charge (or flow rate as you call it) . There is no distance in that expression. Electricity moves at a foot nano second approximately over cabling. Amps don't change that.

Having to size up your cabling to avoid overheating while feeding a load because of the "speed" of electricity is a retarded misnomer because people start wondering what distance has to do with it.

[Anonymous No.1658844]

>>1658841
Drift is actually proportional to current in ohmic conductors such as wires

[Anonymous No.1659130]

>>1658020
Op... It's just this

[Anonymous No.1659267]

OP here, bought the powerbrick and I'll get it tomorrow. While we are at this, can someone explain the difference with volts, watts and amps?

[Anonymous No.1659292]

>>1659267

[Anonymous No.1659359]

>>1659292
This picture raises many questions. Why do volts matter at all if it all comes down to is how much resistance lets through that many amps?

Why don't they just make everything use electricity straight from the plug and just use resistance to regulate everything?

[Anonymous No.1659368]

>>1659359
>Why don't they just make everything use electricity straight from the plug
Did you really ask that ?

[Anonymous No.1659389]

>>1659359
That fat ass neckbeard current don't move on his own. Needs a kick in the ass by voltage Chad.