Hello,
I just gone through some readings and come across positive voltage regulator. I do have some in hands having reference L7805CV.
Can i use these voltage regulators to connect with my fan load.
My apologise in asking these stufss which may sound silly, as im noob in circuit designs..
Alternatively i do have 1 transistor NPN S9013.
http://www.hz-dz.net/UploadFiles/200952711452305.pdf
Meanwhile i will continue my readings and geet to my PWM objective for my fans . . 
Cheers . .