AC/DC 12v Adapter Help

paul maddix · Jan 12, 2013

I have recently purchased a used p.c flt monitor with NO ADAPTER.
This states that it requires a 12v 3.8a adapter.
I have to hand a 12v 1000mA 12VA adapter.
Another I have is a 12v Max 25va.

Not knowing very much about electronics!
Can I safely use either of these, or are they likely to cause any damage to my hardware?

Frick · Jan 12, 2013

If it causes damage it is to the adapter, but nothing else. You're about 2.8A short there, which is quite a lot. It might not even work, so you need a new adapter.

St.Alia-Of-The-Knife · Jan 12, 2013

VA stands for volt amps
In your case it roughly translate into watts so the second one is around 2amps, so not enough

paul maddix · Jan 12, 2013

Thanks

St.Alia-Of-The-Knife said:
VA stands for volt amps
In your case it roughly translate into watts so the second one is around 2amps, so not enough

Thanks for the advice, I suspected that I would have to purchase a NEW ADAPTER!.

Hellraiser1981 · Jan 14, 2013

The adapters you have aren't nearly enough.
Tap into your PC's power supply until you get a new adapter. 12v 3.8A = 45.6W or VA

OneMoar · Jan 14, 2013

Hellraiser1981 said:
Tap into your PC's power supply until you get a new adapter. 12v 3.8A = 45.6W or VA

thats actually not a bad idea ... if he knew what he was doing lol

Hellraiser1981 · Jan 14, 2013

It's easy enough to fold over a stripped wire and jam it in a molex. Yellow is +12v and Black is GND
I've even powered car amps off PC PSU's lol

de.das.dude · Jan 14, 2013

just buy a new adapter for 12V, 60VA or 5Amps

or make yourself one

OneMoar · Jan 14, 2013

Hellraiser1981 said:
It's easy enough to fold over a stripped wire and jam it in a molex. Yellow is +12v and Black is GND
I've even powered car amps off PC PSU's lol

actually the correct and safe way todo it would be to use a crimp on bullet connector ...

paul maddix · Jan 14, 2013

Thanks

Thanks very much for the useful advice chaps.
I will certainly try that, I think I have an old unused PSU around somewhere too.

Frick · Jan 14, 2013

paul maddix said:
Thanks very much for the useful advice chaps.
I will certainly try that, I think I have an old unused PSU around somewhere too.

Just be careful. If you dont know your way around electronics/electricity i recommend against it.

Hellraiser1981 · Jan 14, 2013

paul maddix said:
Thanks very much for the useful advice chaps.
I will certainly try that, I think I have an old unused PSU around somewhere too.

Green wire to GND is PS-ON signal. Sure be careful, but PSU's have over current protect and doing this is very safe. Note some psu's will shut down if there is inadequate load on some rails.

Frick · Jan 14, 2013

Hellraiser1981 said:
Green wire to GND is PS-ON signal. Sure be careful, but PSU's have over current protect and doing this is very safe. Note some psu's will shut down if there is inadequate load on some rails.

how well those protection works depends on the PSU. If its a really really bad one it could be downright dangerous.

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AC/DC 12v Adapter Help

paul maddix

New Member

Frick

Fishfaced Nincompoop

St.Alia-Of-The-Knife

New Member

paul maddix

New Member

Hellraiser1981

OneMoar

There is Always Moar

Hellraiser1981

de.das.dude

Pro Indian Modder

OneMoar

There is Always Moar

paul maddix

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Frick

Fishfaced Nincompoop

Hellraiser1981

Frick

Fishfaced Nincompoop