NerdKits - DIY Marquee LED Array DisplayOur video shows green LEDs, but you can definitely use other colors. Keep in mind that the anode is the longer lead, the cathode is the shorter one (also indicated by a flat section on the plastic case, and by the triangle's tip and line on the schematic), and that current only flows from anode to cathode. Some example part numbers from Digi-Key: Red LEDs Green LEDs Yellow LEDs We also used cardbo
