Dimming an LED strip using a fan controller

[neonraver]

I currently have an LED strip in my case connected by 4 pin molex to the PSU. This means that the LEDs are either on or off, but it would be nice to be able to change the brightness of the LEDs.

I don't have any spare fan headers on my mobo (and I don't really want any of the associated risks of connecting a cheapo eBay LED strip to my mobo) so I thought that I could maybe control the brightness using a potentiometer. I have found this rear slot fan controller that obviously accepts a 3-pin fan. Should I be able to simply use a molex to 3-pin adapter and hook up the LED strip giving me the ability to dial down the brightness? I'm not very electricals savvy so thought I would ask before I take the £1.81 plunge...

 

[neonraver]

If I had a modular PSU I wouldn't be so bothered about disconnecting all the hardware but with mine it would be a massive faff! I didn't think there would be too much of a problem with damaging the PSU/anything connected to it but I don't know if I would want to take the risk...

 

[neonraver]

Thanks. The strips are just blue and I'm not that fussed about range of brightness, I just want to tone them down a bit and be able to turn them off completely I'll fork out the £1.88 and let you know how I get on.