Sorry I'm not very good at explaining things.
PWM signal is common for all fans,right? So you don't really have to worry about it. Speed (or tacho) is separate for both fans. That is what you have to think. Just look at schematic,it's pretty simple and I think it's commonly used in BM miners.
http://kuvapilvi.fi/k/yDe1.jpgThanks, i'll read up on PWM to see how the speed is transmited, since i assumed it just changed the voltage so the fan is set to a speed. This look like the speed controller is on the fan itself?
I'll also check on my GPU fan the next time i open up, since it does work with a y connector, but they're a bit different since they use a 3 pin and a 2 pin.
I also thought at first that it's simply voltage driven,but it's not that simple.That's why I asked Alteras's signal levels.This circuit has some voltage dividing,and it is driven with 3V3 logic. I left some caps out of the schematic,to make it simpler.But that's the basic circuit.
Thanks for giving me the simple version then, i'm pretty bad at circuitry, i actually skipped that part in school, haha. xD
I did a bit of reading now and found this;
http://www.newegg.ca/Product/Product.aspx?Item=N82E16812162026&cm_re=pwm_splitter-_-12-162-026-_-ProductThis show me how i can do it myself or just grab a couple since they're nice and sleeved, more professional than what i could make myself with solder and electric tape.
I still need to figure out how much power the controller can support, however. I'm basing on the S5+/S7 where the controller has a PCI-e connector just for itself, probably for all the fans a S5+ has and how many a S7 also have on a 3x setup.