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Sea-Manner-9238 t1_ja33ugj wrote

Almost… You need a 12v transformer, power supply, wall wart, or whatever you want to call it, rated for at least the total current drawn by all the fans you plan to power. (Really should shoot for at least double). So if your are running 5 fans, aim for 3A or greater on the p/s.

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Tamariniak OP t1_ja34giq wrote

So the voltage on a power supply is a constant supplied voltage and the current rating of the PSU is just its maximum current? Meaning I just have to match the voltage and get a higher (maximum supplied) current than the sum of the fans?

Also, would you happen to know how I could regulate the speed? Is 12V the slowest or the fastest? Is it safe to run the fans at a lower voltage than what their rating is?

EDIT: one more thing, at a lower voltage, would the current flowing through the fans be lower than the rating (via Ohm's law) or does the current somehow stay the same regardless of the voltage?

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Sea-Manner-9238 t1_ja367ai wrote

Yes

That should be fine, though a PWM controller might be better.

Theoretically yes? But I’m not sure if there is something funky about the way motors work.

Only one way to know for sure…

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