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AC/DC 12v Adapter Help

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#1
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?
 
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Frick

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#2
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.
 
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#3
VA stands for volt amps
In your case it roughly translate into watts so the second one is around 2amps, so not enough
 

OneMoar

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#6
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
 

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#8
just buy a new adapter for 12V, 60VA or 5Amps :)
or make yourself one :)
 

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#9
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 ...
 
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#10
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

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#11
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.
 
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#12
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

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#13
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.