Hi! I am wiring together LEDs to connect with my Duemilanove Arduino.
I am going to be using 2.2V LEDs at 20 milliamp. My question is, because each digital pin operates at 5 volts, i should only wire 2 LED in series off of each pin, right? Also if i put 3 parallel as i just described, will i be okay? (All of this using a 30ohm resistor for each circuit.)
Thanks for your help.
Also, If you have another/better idea of how to do this let me know.