On a recent PC build, I am having some heat issues. My plan is to add two additional intake fans to the front of the case to supplement my exhauster fan at the rear. The problem is, I only have two fan headers on the board (CPU and system1).
What I can do is use an adaptor to allow a Molex connector, from the power supply to power the two front mounted fans. The problem with this idea is they will be on or off depending on the power state with no speed control. Another option is to use a "Y" splitter to provide power to two fans from one header. This might be fine for only two fans total, but for a setup needing three fans, I think this would draw more power than the header is designed to provide.
I have a solution, and I know how it would work but would rather there was a pre-built version I could buy rather than build it...
Imagine a small box with several fan headers on it that could connect to several system fans. It has one fan cable that plugs into the board header. It then receives a feed from a Molex cable. The board will pass voltage to the box (probably pulse width modulation) and the box use transistors to open on each pulse forwarding a pulse of voltage to the motors.
This would allow several fans to be powered from the power supply, yet controlled by the board without putting any extra load on the board.
Does such a thing exist or should I get to work creating a circuit board and getting my "box" 3d printed lol.