Newbie Question for power supply [duplicate]

I am sorry if I am asking a basic question here but have no idea what I am talking about :).

My question is this:

I have a digital camera that requires DC supply.
I have a couple of power supplies but not sure if either are any good.

On the camera it states: DC12W 5Watt Max

On power supply 1: INPUT 100-240 VAC 50/60Hz 0.5A OUTPUT +12V 1A

On power supply 2: INPUT 100-240 VAC 50/60Hz 0.8A OUTPUT +5V 4

Are either power supplies powerful enough or are they too much?

Thanks

• is it 12W or 12V on the cam? Commented Jan 23, 2015 at 18:20
• I would think it's 12V on camera, which at 5W max would be under 500mA. So the power supply 1 would work. You need to match the voltage rating, the current rating of the power supply just has to be higher than the current requirement of the camera. Commented Jan 23, 2015 at 18:22
• I assume that's 12V, so 5W gives you 5/12 = 0.42A, so any power supply that outputs 12VDC and can supply A >= 0.42A will work. Commented Jan 23, 2015 at 18:22
• Hi chaps. Thanks for trying to help me. It says DC12V and 5W MAX on cam Commented Jan 23, 2015 at 18:23
• I suggest looking at the best answer to this question: electronics.stackexchange.com/questions/34745/… Specifically the Voltage Rating and Current Rating sections. Commented Jan 23, 2015 at 18:23