Scanner Power Supply

[randroid]

Gents,

 

First time posting an OT topic here but with the threads that have already been answered I can only suppose other members check this, so here goes:

 

I'm setting up a scanner for my computer.  It's an HP Scanjet 3970 that I've had for a while and the power required is 12v DC @ 340mA.  The power supply I have is 12v DC @ 1250mA.  Seem to me that the extra power is fine so long as I don't need it, sort of like the different watts in our car batteries are only used if needed.  Before I start a small fire on my desk I think it might be prudent to ask, so will the extra amps be fine to run or should I try to find a smaller capacity power supply?

 

Thanks,

 

-Randy

[Don Coatney]

You should be fine. Twelve volts DC is what it is looking for. The device will only pull enough ampes to meet its requirement and the power supply you plan on using will supply the requirement.

[randroid]

Don,

 

Thannks, that's what I thought but I sure feel safer since I asked.

 

-Randy

[BobT-47P15]

I sometimes wish I knew more about the ins and outs of those little power supply boxes. 

You see a ton of them, just by themselves, at places like thrift stores who take donations of goods from

the public.  Occasionally I find some item with no supply.....it got separated somewhere along the line....and

don't know if the item tells on its tag what volts and milliamps are needed.  So I simply ignore the item and go

on my way. 

[Don Coatney]

The output on these power supply boxes is usually listed somewhere on the unit. If you find one with a 6 volt DC output you can use it as a battery tender on your 6 volt car.

[Alshere59]

You will need to make sure the polarity is the same also. They are normally marked.