In this lecture, I discuss the Light Emitting Diode (LED), and make one blink on and off in our first Arduino sketch. I also discuss the structure of an Arduino sketch, and specifically functions and variables.
Do all diodes emit light? In the start of the video, I mention that "all diodes emit light", not just LEDs. It would have been better to qualify this statement. There is a discussion going on in the Udemy forums about this, which I encourage you to read and participated if you are interested in this topic.I am looking into the literature to better understand the light emission process before I can "safely" revise this video. I hope I am not confusing you too much with this.