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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?



marked as duplicate by Ricardo, Nick Alexeev Jan 23 '15 at 19:00

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  • \$\begingroup\$ is it 12W or 12V on the cam? \$\endgroup\$ – Eugene Sh. Jan 23 '15 at 18:20
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    \$\begingroup\$ 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. \$\endgroup\$ – I. Wolfe Jan 23 '15 at 18:22
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    \$\begingroup\$ 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. \$\endgroup\$ – Jarrod Christman Jan 23 '15 at 18:22
  • \$\begingroup\$ Hi chaps. Thanks for trying to help me. It says DC12V and 5W MAX on cam \$\endgroup\$ – Andrew Simpson Jan 23 '15 at 18:23
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    \$\begingroup\$ I suggest looking at the best answer to this question: electronics.stackexchange.com/questions/34745/… Specifically the Voltage Rating and Current Rating sections. \$\endgroup\$ – FullmetalEngineer Jan 23 '15 at 18:23

I bet that on the camera it states "DC12V" 5Watt Max. If i'm right, use the power supply 1. If it is +12V 1A rated it means it can deliver 12Watt, so you have more than enough power.

  • \$\begingroup\$ I am about to give it a go :) \$\endgroup\$ – Andrew Simpson Jan 23 '15 at 18:23
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    \$\begingroup\$ @AndrewSimpson Just make sure the polarity on the cam and the power supply is the same (the little circle-in circle marking with + and -) \$\endgroup\$ – Eugene Sh. Jan 23 '15 at 18:25

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