I have done some research and from what I can find the max led lights I can have on on one pin is 25 (20 * 25 = 500) assuming that 500 mA is the most I can have on any one port. So what shields, chips resistors do I need to run 100 leds ?
my xmas list so far (i have wire snips solder solder gun......)
Arduino Uno- http://goo.gl/f5gpa
bread board - 2x http://goo.gl/zopCJ or 1x http://goo.gl/f5gpa
Arduino Wire Jumpers 70x m2m - http://goo.gl/GXNHF
100 led - http://goo.gl/xlQTx