cool
i just started the same project
i wish to setup a saber with 4 strings of 14 parallel linked round leds, for a total of 56
i bought leds with 25-30 angle degree 5mm 20mA 3.0-3.4v (couldn't find with 45°, the best choice for sabers)
http://www.ebay.it/itm/121159310865?var=420163719904&ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
now i am thinking also about powering and linking the strings to arduino
i have seen the driver linked above: how to link it to the string and to the digital pin of arduino? we need a transistor?