Full Version: Small Electricity Question With Ac Adapters
If I have one ac adapter having specs like 120v ac input, 12v dc output, 25 watts, 1200mA and hook it up to a case fan...........then say I have another ac adapter, same input and outputs, but a lower watt and a lower mah rating. Does that mean, that if I use the 25 watt ac adapter for this fan, I'm using more electricity, or does it mean, I'm only using whatever watts it takes to power that fan, and the rest is extra or what it's capable of doing for an ac adapter?
QUOTE (iwantaprojector @ Nov 30 2006, 12:32 AM) 
If I have one ac adapter having specs like 120v ac input, 12v dc output, 25 watts, 1200mA and hook it up to a case fan...........then say I have another ac adapter, same input and outputs, but a lower watt and a lower mah rating. Does that mean, that if I use the 25 watt ac adapter for this fan, I'm using more electricity, or does it mean, I'm only using whatever watts it takes to power that fan, and the rest is extra or what it's capable of doing for an ac adapter?
you got it right
here
I'm only using whatever watts it takes to power that fan, and the rest is extra or what it's capable of doing for an ac adapter?
What he said 
plus it never hurts to have excess capacity in your supply. Taking a supply to its limits makes it work harder and potentially reduces its service life.
plus it never hurts to have excess capacity in your supply. Taking a supply to its limits makes it work harder and potentially reduces its service life.
What a great place to find an answer to a question like that. Thanks!
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