JoeN:
Riva:
If you want to fade individual LED's then 4x WS2803 chips will drive 72 LED's (18 LED's per chip).Where do you even find these? I put WS2803 into Digikey, Findchips, and Jameco and no one seems to have ever heard of them.
eBay is where you find them. $2-$3 each chip depending on quantity bought http://www.ebay.co.uk/itm/5x-Worldsemi-WS2803SO-18-Channel-RGB-Constant-Current-LED-Driver-SOP-WS2803-PWM-/150721605686?pt=LH_DefaultDomain_0&hash=item2317b53036