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Power adapter

S

SinNisTeR

Diamond Member
I have an electronic device that requires a 18V 3A source. Can i use a 19V 3.42A laptop power adapter to power that device?

I know that the current is ok, since it will only use what it needs, but will the 1v difference hurt it in any way?

Otherwise, where's the best place to buy a universal power adapter?
 
Originally posted by: SinNisTeR
I have an electronic device that requires a 18V 3A source. Can i use a 19V 3.42A laptop power adapter to power that device?

I know that the current is ok, since it will only use what it needs, but will the 1v difference hurt it in any way?

Otherwise, where's the best place to buy a universal power adapter?
Click to expand...

Depends on the device. If it's a simple motor, heater, or something like that, go for it. It's an electronic device, watch out. Make sure it doesn't overheat. If you're paranoid, get a voltage regulator.
 
It will work, unless the device is very sensitive to voltage and current changes, but most consumer devices aren't. The current should be ok because when you first turn it on, you will get a huge biurst of current that will be greater than 3Amps anyways. even then, if it is a consumer device, it should have some sort of over current shut off protection. As for the voltage....it should be alright because lots of devices today arte made with "dirty" voltage supplies in mind.
 
if they are both DC or both AC , then it should be fine, you didn't specify

if DC as they said above, the polarity MUST be correct
 
Originally posted by: Gibson486
It will work, unless the device is very sensitive to voltage and current changes, but most consumer devices aren't. The current should be ok because when you first turn it on, you will get a huge biurst of current that will be greater than 3Amps anyways. even then, if it is a consumer device, it should have some sort of over current shut off protection. As for the voltage....it should be alright because lots of devices today arte made with "dirty" voltage supplies in mind.
Click to expand...

You can fake it a little bit by putting a capacitor across the load. Then the current across the device won't have that spike.

Edit: Only works for a DC load
 
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