Power Supply advice required

SexyGreyFox · 24 Mar 2009 at 10:31

I've had some video splitters delivered but no power supplies with them so I've hunted around the academy and found 2 x AC 9V, 700mA and 1 x AC 9V, 1000mA power supplies.
I've tried the 700mA and it works perfectly and in one of the lecture rooms they are enjoying their lesson on both a monitor and Smartboard.
However, I've just looked at the specs on the web and it says it needs an AC 9V, 200mA supply so will the 700mA do any harm?
Would the 1000mA be OK because it does power it up?

Thanks

Bear · 24 Mar 2009 at 10:37

It will be fine, it only draws the current it needs. Being over specced is fine, being under specced is not as it would current limit.

SexyGreyFox · 24 Mar 2009 at 11:18

Thanks for that.
I was worried I might go down to the classroom and see 10 Nurses frazzled.

mattyprice4004 · 24 Mar 2009 at 11:44

Be careful, if they are cheap unregulated supplies they could output higher voltages under lower loads, I had a 12v supply for some Creative speakers that gave out 17v under no load, which dropped as more load was applied.

I don't miss my electronics course

p4radox · 24 Mar 2009 at 11:51

As long as the voltage rating is correct, the current rating just needs to be greater than or equal to what's actually being drawn.