I need to use 5 white LEDs connected to an Arduino Duemilanove
I'm absolutely new to electronics and have no idea which resistor value I should apply to each LED. Looks like 200 ohms or 270 ohms is fine for the LEDs provided with the starter kit but for the LEDs I intent to buy, I'm not sure. See info below.
LED Ø 5 mm Intensité lumineuse >10cd (10.000mcd) 50cd@ 3,6V / 75mA Maxi: 50cd @4,2V
If someone could tell me how to calculate that value that would be great.