Can Someone help me with the PWM frequency of this 4 wire Fan?

Can Someone help me with the PWM frequency of this 4 wire Fan?

Hi /r/engineering,

As the title states, I have a 4 wire fan (Nox Knik 80 mm) and I need to control it with a microcontroller.

The only datasheet I've found about 4 wire fans is this, which appears in a lot of websites as well.

It says that the PWM frequency should be around 25 kHz, but I wonder if using it in a lower freq (such as 1 kHz) would be a problem, because to get a 25 kHz PWM frequency with my microcontroller I have to loose quite a lot of resolution.

Does anybody have an answer or some experience working with this kind of fans?

Thanks.

Submitted February 28, 2017 at 05:11PM by jgm_315
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Can Someone help me with the PWM frequency of this 4 wire Fan?

Fellowships/Funding for Masters-Level Programs

Fellowships/Funding for Masters-Level Programs

Hello all,

I am currently finishing up a B.S. in Chemical Engineering. I've been considering getting a M.S. degree after graduating, and I've found a couple of programs that would provide the additional educational depth that I am seeking. However, almost all the programs I've found are not supported by funding.

Do you know of any external fellowships or funding that is available to Masters-level students? If it helps, I have no problem choosing a thesis-based option

Submitted February 28, 2017 at 01:44PM by JumpingHigh
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Fellowships/Funding for Masters-Level Programs

Is official notice sent out if a patent is awarded?

Is official notice sent out if a patent is awarded?

Hi all,

Recently a patent we submitted was approved. A few others and myself are the inventors, but this was done on a contract, so the assignee is the company we were in contract with.

Will I receive any official notification in regards to the patent being approved? Or is that all received by the assignee?

Thanks!

Submitted February 28, 2017 at 12:04PM by Tanky321
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Is official notice sent out if a patent is awarded?