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[Baron Von Spongebob]

My laptop has a power supply of 19v.  3.16 amp..

I have found a power supply which is 19v. 3.42 amp output.

Would this be ok to use..

The polarity is the same just the slight difference in amp output.

Thanks in advance .

[Ken T]

Yes. Amp output is like how much current, or how many electrons can it deliver. You don't need to use all the available current, just as much as the equipment needs to work. Like a water tap, you can just turn it on a trickle, when its capable of supplying a hose pipe at full blast

Ken

[Crazydad]

My laptop has a power supply of 19v.  3.16 amp..

I have found a power supply which is 19v. 3.42 amp output.

Would this be ok to use..

The polarity is the same just the slight difference in amp output.

Thanks in advance .

don´t know

[ians]

Yes. Amp output is like how much current, or how many electrons can it deliver. You don't need to use all the available current, just as much as the equipment needs to work. Like a water tap, you can just turn it on a trickle, when its capable of supplying a hose pipe at full blast

Ken

I agree.  As long as its 19V and at least the current requirement of your PC it will be fine (and polarity the same as you note).

[Dave-C]

I'd use that transformer / PSU... No probs

If you were to use a 5 amp for example, that could present a surge problem!

I say this because, my wife is into dolls houses, (I don't mean that she's 1/12 th the scale of other women)  They sell balanced transformers for the lights.. e.g. if you have 10 lights they advise not to use a 20 light transformer... surge will blow their delicate fillaments...  

DC

[cem_devecioglu]

My laptop has a power supply of 19v.  3.16 amp..

I have found a power supply which is 19v. 3.42 amp output.

Would this be ok to use..

The polarity is the same just the slight difference in amp output.

Thanks in advance .

Will be ok..

[TheBoy]

Be fine if its regulated to 19v (ish) - very likely as it will probably be smps.

[Ken T]

I'd use that transformer / PSU... No probs

If you were to use a 5 amp for example, that could present a surge problem!

I say this because, my wife is into dolls houses, (I don't mean that she's 1/12 th the scale of other women)  They sell balanced transformers for the lights.. e.g. if you have 10 lights they advise not to use a 20 light transformer... surge will blow their delicate fillaments...  

DC

As TB says, this is the regulated/unregulated difference. Laptop PSU's have been switchmode for a long time, which means the output will be fixed despite what current is drawn. There will be a slight change because of the volts drop across the current sensing component, but effectively nothing. Interestingly enough, the laptop circuitry takes this input DC and feeds it to another switchmode circuit, which takes care of any differences in the input, so you could vary the input voltage a bit without any problems. For example you sometimes see 20V PSU's; they will work OK. The power supply that is just a transformer, has no regulation (cause it would cost more) and the transformer output will change depending on how much you draw out of it. So if you don't have all the bulbs on, the voltage will rise, which may blow some bulbs, so the voltage will rise even further etc. If you replaced the transformer with a regulated power supply, it wouldn't matter if you had 1 or 40 bulbs on, the voltage wouldn't rise above the set level.

Ken

[Baron Von Spongebob]

Thanks for the replies..

I didnt think it would make much difference but just checking..

[Crazydad]

Thanks for the replies..

I didnt think it would make much difference but just checking..

Yes i agree, better to be safe than sorry