Will this power suppy & PC fan work?

[SanFranTodd]

Wanting to wire up a computer fan to cool of the lighting canopy, just don't want to burn the house down!


Fan: DC12V 0.19A

Power Supply: Input 100-240V~50/60Hz 0.4A / Output DC12V/1.5A





Thanks!

[israelnajar]

Man I need a 12V/1.5A powersupply. I use the phone charges. They are anywhere from 6 to 12V and usually 300 to 900mA. I wouldn't use that charger unless you were wiring more than one fan on it. But that is just me.

[SanFranTodd]

Is it too much power? I found it in my junk drawer :D.

[Pbrown3701]

you're fine using it. I think israelnajar was suggesting that it was a "waste" of power. IT's completely safe however.

[SanFranTodd]

great, thanks guys!


I also dug this one up, if it would be a better option:

Input: 120V~ 60Hz 15W / Output: 12V 700mA



It's twice as big as the other one (in size), but I think those specs use less juice (correct?)



thanks again

[israelnajar]

If it were me I would use the 700mA one as I don't like to waste energy when at all possible. The difference in fan speed will hardly be noticed.

[ErikJL]

You're not really wasting energy as the fan determines the power drawn, not the DC supply. The 700mA supply will work just fine and would support 3 of those fans in parallel.

[smcdonn]

When they state an OUTPUT on the power supplies, the amperage is simply a MAX. The fan will pull .19 amps at 12 volts no matter what amperage the supply is rated at (assuming its rated higher than .19A).

[bebitte70]

<a href=showthread.php?s=&postid=11516534#post11516534 target=_blank>Originally posted</a> by smcdonn
When they state an OUTPUT on the power supplies, the amperage is simply a MAX. The fan will pull .19 amps at 12 volts no matter what amperage the supply is rated at (assuming its rated higher than .19A).

I agree with you 100%, just take note that usually the voltage will be slightly higher than stated when using a lower load than indicated. You are still fine using it though. I would use the 700mA PS.

[israelnajar]

That is true but you are still wasting energy with the unused juice. Don't believe me plug that same power supply into a kill-o-watt meter, with nothing connected to it. I'm pretty positive that it will be using/wasting energy.

[kgross]

Yes the higher wattage powersupply will have more wasted energy if both power supplies are built to similar efficiencies. But you will be looking at less than a watt so I don't think you could ever notice it on a power bill.

Kim

[Icefire]

That is rediculous, plug both in a kill o watt meter and they will have less than 1W in difference.

And you could be supprised as the 700mA might be way less efficient than the 1500mA and be the one taking 1W more.

[eznet2u]

<a href=showthread.php?s=&postid=11514364#post11514364 target=_blank>Originally posted</a> by israelnajar
I don't like to waste energy when at all possible.

And you own a reef tank? :) No offense, but this is not the hobby to be in...

ALL wall warts consume power when they are plugged in. The higher amperage one's are usually MORE efficient than the little ones. Check for yourself.