for a quick project I need to use these leds (http://www.sparkfun.com/products/9850) hooked up with the 12 PWM mega pins.
the leds are 20mA 3.2 Volt
the sketch will fade all the leds at the same time using various durations for each of them
What kind of resistors I need to use? Please I need to buy them tomorrow, let me know if you have any idea..
I tried without resistors and they all work fine, but the Mega chip is burning hot so I guess I need to do something different. I have no time to use IC chips at the moment..