Electric fan help

[lastlight]

I bought some fans from a computer store in town. For the power I bought a powered usb adapter of some sort. Don't even recall what it was exactly but it was the cheapest thing in the store that came with a 12V power supply. I threw the usb bit out and the power supply connected directly to the fans right out of the box lol.

[Binare]

If it says 50/60 hz. Its an ac fan, the hz is the frequency the current is alternating at, hence Alternating Current (ac). DC (direct current) does not have a frequency. That fan requires a 12V ac transformer.

[Wayne]

Originally Posted by Binare

If it says 50/60 hz. Its an ac fan, the hz is the frequency the current is alternating at, hence Alternating Current (ac). DC (direct current) does not have a frequency. That fan requires a 12V ac transformer.

How many amps of output?

[Binare]

Anything rated atleast, or higher then the current draw of the fan. Are you sure on the specs you posted? .24mA seems pretty low to me. Probably more like .24A, double check it, if its .24A, you'll need a 12v AC transformer rated for atleast 240mA output.

[Wayne]

Yeah I checked this weekend and it is .24A. I found a 9v 400ish mA transformer. That should work but spin them slower correct. (would be quieter)

[Binare]

You got it

[ScubaSteve]

My recommendation would be to a) get a 12 VDC wallwart (or transformer as you call them), b) make sure it has atleast 1 A capabilities, c) wire them with a cheap rhiostat knob/voltage splitter and d) wire them in parallel. This will let you run them at full if you want but you can turn them down if they are too noisy, make sure they both run at the same speed (the voltage drop across the first will casue the second fan to run a bit slower and also you won't explode your wallwart because you are over drawing it (0.24A x 2 = 0.48A... more than your unit is rated for. And yes, I realize that is 0.24A at 12VDC).

Head on out to your friendly local electronics supply store and they'll help you out with finding the right part.

[Binare]

Originally Posted by ScubaSteve

My recommendation would be to a) get a 12 VDC wallwart (or transformer as you call them), b) make sure it has atleast 1 A capabilities, c) wire them with a cheap rhiostat knob/voltage splitter and d) wire them in parallel. This will let you run them at full if you want but you can turn them down if they are too noisy, make sure they both run at the same speed (the voltage drop across the first will casue the second fan to run a bit slower and also you won't explode your wallwart because you are over drawing it (0.24A x 2 = 0.48A... more than your unit is rated for. And yes, I realize that is 0.24A at 12VDC).

Head on out to your friendly local electronics supply store and they'll help you out with finding the right part.

AC NOT DC. And ya, missed the part about 2 fans, thought it was a single. So 12v AC (not DC) 480mA transformer. The one you got will be just fine though.

[Wayne]

Awesome will have them running in the next few days Thanks guys!