Well, you've got 3 ways of doing it.
The first is to buy the TBAN-XL (T-Balancer Classic for upto 4 fans) and the analogue sensor hub (adds 2 fans) which will cost about £70 all in with sensors.
The second is to buy a TBAN-BigNG (4 fans) and a TBAN-MiniNG (2 extra fans) which will cost about £90 with sensors but these work with analogue sensors too so you can hook up a water flow guage or a light sensor (mine turns the fans on at day-break)
Finally, you can just buy 3 TBAN-MiniNG which gives you the same as the above, but in 3 small boxes rather than 1 big box and 1 small one. Again - £90 including sensors.
At this point you are thinking 'kin 'ell that's a lot more than £30 for a Hardcano 12 and it is. But the Hardcano only does 4 fans at 4 intensities and it's a piece of junk.
The way the Hardcano works is you set a temperature for each fan. From memory you can have 30, 40, 50, 60 or 70C.
50C, 60C and 70C are effectively useless as if anything other than a hard drive or the processor is exceeding 50C your room is on fire anyway.
But let's say you set the HDD to be at 50C. And you couple up the big fan in the front to that control. If the HDD measures 40C then the fan will spin at 5V. Your LED's will be very dim. If the temperature rises, then the fan stops up in a linear way, to 12V at 50C. At this point all hell breaks loose as the alarm goes off and you cannot silence it unless the temperature drops below 50C again. So you set it to 60C at which point the fan never spins over 5V as it's very unlikely to trip below the next set-point.
You lack control of the set-points and the fan speeds.
With the T-Balancer, you have pulse-width-modulation (PWM) control rather than variable voltage. PWM always supplies 12V so your LEDS are always really bright. PWM just turns the power on and off REALLY fast so the fan spins slower. In the supplied software you can decide the set-points, you decide the shape of the temperature curve and you have complete control of your fans.
I've been there, done that with automatic fan controllers and I've sold them all except for 1 TBAN-XL with the analogue sensor upgrade and I have several manual fan controllers because actually, they're fine.
