Arduino Simple Experiments Part 1. Fade On/Off LED <br /> <br />Just making a LED fade in and then fade out using PWM Pulse Width Modulation via the analogWrite() function <br /> <br />Arduino Leonardo Compatible Code:- <br /> <br />File : <br /> <br />experiment_part_1.ino <br /> <br />http://1drv.ms/1NfCGHe <br />.